Re: Stus-List Mechanical shaft seal options

[Della Barba, Joe via CnC-List]

My first one lasted from about 1988 to around 2012. I may have left it in a bit 
long.

Joe Della Barba
Coquina

From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Michael 
Brannon via CnC-List
Sent: Wednesday, December 18, 2019 7:03 AM
To: cnc-list@cnc-list.com
Cc: Michael Brannon 
Subject: [EXTERNAL] Re: Stus-List Mechanical shaft seal options

I asked about maintenance on the PYI seal and was told to replace the bellows 
every 5-7 years.   I’ve found that it is best to replace the unit as by that 
time the carbon seal is starting to score and requires replacement also.   The 
bellows is the weak link in the system and since failure of the bellows would 
be catastrophic I have followed this schedule.   I’ve been using the seal since 
about 1997 and have been very happy with it.

Sail Safe,

Mike

Mike Brannon
Virginia Lee 93295
C 36 CB
Virginia Beach, VA




On Dec 12, 2019, at 1:17 PM, Josh Muckley via CnC-List 
mailto:cnc-list@cnc-list.com>> wrote:

Just a week ago a dock neighbor of ours had this exact twisting action 
completely separate their bellows on a PYI seal.  The only indication of a 
problem from the helm was the fwap, fwap, fwap sound of the vent hose whipping 
around and hitting the inside of the hull.  Evidently the stainless ring a 
lightly seized to the carbon ring.  Seized together the carbon ring rotated 
with the shaft and twisted up the vent hose until the slack was out and then 
amputated the vent at its remote barb fitting.  Fortunately enough, a 
remarkably small amount of flooding occurred.  When the seal was righted in its 
orientation the leak stopped almost completely despite the circumferential 
tear.  The owner knew that the seal needed replaced and in fact was about to 
depart for the boat yard just a few hundred yards away so that they could have 
the seal replaced during the winter.  His other shaft seal looked just about as 
bad too!

On the PYI seals and others with a bellows design, the service life is 
typically 3 to 5 years before recommended replacement.  The bellows has to be 
flexible so a thinner material is used.  Of course the constant stress of 
compressing the bellows is an additional factor degrading the rubber.  In the 
case of PYI this $2 piece of hose costs ~$100.

In the case of the Lasdrop Gen 2 the $2 hose is ridged and thick to resist the 
compression of the SS spring in the seal pack.  The service interval is 8 to 10 
years.


If I was to go back to a packing style seal what would be involved?


Josh Muckley
S/V Sea Hawk
1989 C 37+
Solomons, MD

On Thu, Dec 12, 2019, 12:17 PM Len Mitchell via CnC-List 
mailto:cnc-list@cnc-list.com>> wrote:
Josh, Shawn is correct. The 6 inch or so piece of hose on the original packing 
gland. I would bet a high number of boats still have it in service. Mine was 20 
years old when I replaced it and the outer rubber layer had cracks in it. There 
isn’t a lot of water pressure on it but it gets a little twisting force. Any 
original rubber hose should be gone by now. Len

Sent from my iPad
___

Thanks everyone for supporting this list with your contributions.  Each and 
every one is greatly appreciated.  If you want to support the list - use PayPal 
to send contribution --   https://www.paypal.me/stumurray
___

Thanks everyone for supporting this list with your contributions.  Each and 
every one is greatly appreciated.  If you want to support the list - use PayPal 
to send contribution --   https://www.paypal.me/stumurray

___

Thanks everyone for supporting this list with your contributions.  Each and 
every one is greatly appreciated.  If you want to support the list - use PayPal 
to send contribution --   https://www.paypal.me/stumurray

Re: Stus-List Mechanical shaft seal options

[Michael Brannon via CnC-List]

I asked about maintenance on the PYI seal and was told to replace the bellows 
every 5-7 years.   I’ve found that it is best to replace the unit as by that 
time the carbon seal is starting to score and requires replacement also.   The 
bellows is the weak link in the system and since failure of the bellows would 
be catastrophic I have followed this schedule.   I’ve been using the seal since 
about 1997 and have been very happy with it.   

Sail Safe, 

Mike

Mike Brannon
Virginia Lee 93295
C 36 CB
Virginia Beach, VA



> On Dec 12, 2019, at 1:17 PM, Josh Muckley via CnC-List 
>  wrote:
> 
> Just a week ago a dock neighbor of ours had this exact twisting action 
> completely separate their bellows on a PYI seal.  The only indication of a 
> problem from the helm was the fwap, fwap, fwap sound of the vent hose 
> whipping around and hitting the inside of the hull.  Evidently the stainless 
> ring a lightly seized to the carbon ring.  Seized together the carbon ring 
> rotated with the shaft and twisted up the vent hose until the slack was out 
> and then amputated the vent at its remote barb fitting.  Fortunately enough, 
> a remarkably small amount of flooding occurred.  When the seal was righted in 
> its orientation the leak stopped almost completely despite the 
> circumferential tear.  The owner knew that the seal needed replaced and in 
> fact was about to depart for the boat yard just a few hundred yards away so 
> that they could have the seal replaced during the winter.  His other shaft 
> seal looked just about as bad too!  
> 
> On the PYI seals and others with a bellows design, the service life is 
> typically 3 to 5 years before recommended replacement.  The bellows has to be 
> flexible so a thinner material is used.  Of course the constant stress of 
> compressing the bellows is an additional factor degrading the rubber.  In the 
> case of PYI this $2 piece of hose costs ~$100.
> 
> In the case of the Lasdrop Gen 2 the $2 hose is ridged and thick to resist 
> the compression of the SS spring in the seal pack.  The service interval is 8 
> to 10 years.
> 
> 
> If I was to go back to a packing style seal what would be involved?
> 
> 
> Josh Muckley 
> S/V Sea Hawk 
> 1989 C 37+
> Solomons, MD 
> 
> On Thu, Dec 12, 2019, 12:17 PM Len Mitchell via CnC-List 
> mailto:cnc-list@cnc-list.com>> wrote:
> Josh, Shawn is correct. The 6 inch or so piece of hose on the original 
> packing gland. I would bet a high number of boats still have it in service. 
> Mine was 20 years old when I replaced it and the outer rubber layer had 
> cracks in it. There isn’t a lot of water pressure on it but it gets a little 
> twisting force. Any original rubber hose should be gone by now. Len
> 
> Sent from my iPad
> ___
> 
> Thanks everyone for supporting this list with your contributions.  Each and 
> every one is greatly appreciated.  If you want to support the list - use 
> PayPal to send contribution --   https://www.paypal.me/stumurray 
> 
> 
> ___
> 
> Thanks everyone for supporting this list with your contributions.  Each and 
> every one is greatly appreciated.  If you want to support the list - use 
> PayPal to send contribution --   https://www.paypal.me/stumurray
> 

___

Thanks everyone for supporting this list with your contributions.  Each and 
every one is greatly appreciated.  If you want to support the list - use PayPal 
to send contribution --   https://www.paypal.me/stumurray

Re: Stus-List Mechanical shaft seal options

[Josh Muckley via CnC-List]

I'm sold.

On Thu, Dec 12, 2019, 2:13 PM dwight veinot via CnC-List <
cnc-list@cnc-list.com> wrote:

> Nothing, no grease nothing. One hub zinc in 15 years is all i did so far.
> I do remove marine growth every haul out and I have a Spurrs rope cutter on
> the shaft about 2 inch forward of the hub
>
> On Thu, Dec 12, 2019 at 2:52 PM Josh Muckley via CnC-List <
> cnc-list@cnc-list.com> wrote:
>
>> Do you grease it?  No disassembly?  No lip seals or ball bearings?
>> That's kinda remarkable!
>>
>> The 3 blade H5 is what was recommended to me... Most likely in 16".
>>  ~2100 GBP.
>>
>> Josh
>>
>> On Thu, Dec 12, 2019, 1:48 PM dwight veinot via CnC-List <
>> cnc-list@cnc-list.com> wrote:
>>
>>> For Josh about my Bruntons Autoprop. It is the 3 blade H5. It was on
>>> Alianna when I purchased her in 2005. So far i have replaced the hub zinc
>>> once that’s all in 15 years of use in salt water. It is powered by a
>>> Universal M4-30 and has strong reverse and powers Alianna a 35 MK2 at
>>> around 14,000 pounds loaded for cruising well into seas and wind. I sail
>>> with the transmission in forward and i can see a half knot or so speed
>>> increase when it is locked in forward, for example from 6.4 to 6.9. I can
>>> use that as a “passing gear” so that boats getting passed don’t know what
>>> happened All of a sudden like. lol. And it is very quiet.
>>>
>>> On Thu, Dec 12, 2019 at 2:21 PM Josh Muckley via CnC-List <
>>> cnc-list@cnc-list.com> wrote:
>>>
>>>> I tend to agree with the caveat that we are talking about boats that
>>>> don't exceed 10 kts under motor.  Most of the manufacturers have provision
>>>> for boats less than 10 and those greater than 10.  Obviously those greater
>>>> than 10 are rare in the sailing community.
>>>>
>>>> Josh Muckley
>>>> S/V Sea Hawk
>>>> 1989 C 37+
>>>> Solomons, MD
>>>>
>>>> On Thu, Dec 12, 2019, 10:42 AM Robert Boyer via CnC-List <
>>>> cnc-list@cnc-list.com> wrote:
>>>>
>>>>> I don’t use the vent hose.  I do burp the shaft seal after a launch.
>>>>> I think having the vent hose adds an unnecessary risk and has very little,
>>>>> if any, benefit.  Just my $0.02.
>>>>>
>>>>> Bob
>>>>>
>>>>> Bob Boyer
>>>>> s/v Rainy Days
>>>>> C Landfall 38 (Hull # 230)
>>>>> (Presently in Baltimore for the summer)
>>>>> blog: dainyrays.blogspot.com
>>>>> email: dainyr...@icloud.com
>>>>>
>>>>> On Dec 11, 2019, at 5:31 PM, Marek Dziedzic via CnC-List <
>>>>> cnc-list@cnc-list.com> wrote:
>>>>>
>>>>>  For a vented PYI, you need to make sure that the vent is high enough
>>>>> above the water level or you risk getting burps of water if you need to go
>>>>> into high reverse (e.g. when docking or emergency stopping). Some use a
>>>>> bottle that collect these burps. I plumbed the vent into the sink drain. 
>>>>> As
>>>>> long as you open the drain occasionally, no issues.
>>>>>
>>>>> Marek
>>>>>
>>>>> 1994 C270 Legato
>>>>> Ottawa, ON
>>>>>
>>>>>
>>>>>  Original message 
>>>>> From: Ken Heaton via CnC-List 
>>>>> Date: 2019-12-11 10:57 (GMT-05:00)
>>>>> To: cnc-list 
>>>>> Cc: Ken Heaton 
>>>>> Subject: Re: Stus-List Mechanical shaft seal options
>>>>>
>>>>> Is yours vented?  The vent was added some years ago. With it you never
>>>>> need to burp the seal.  We don't have the vent so occasionally we do have
>>>>> to burp it.  If I ever replace it I will put the same dripless, but with
>>>>> the vent.
>>>>>
>>>>> Ken H.
>>>>>
>>>>> On Tue, 10 Dec 2019 at 13:48, Josh Muckley via CnC-List <
>>>>> cnc-list@cnc-list.com> wrote:
>>>>>
>>>>>> Alright folks,
>>>>>>
>>>>>> I'm looking for thoughts on a replacement for my PYI dripless shaft
>>>>>> seal.  It has worked fine and I'm not afraid to stick with it but I'm
>>>>>> looking for possible options or improvements.
>>>>>>
>>>>>> 

Re: Stus-List Mechanical shaft seal options

[dwight veinot via CnC-List]

Nothing, no grease nothing. One hub zinc in 15 years is all i did so far. I
do remove marine growth every haul out and I have a Spurrs rope cutter on
the shaft about 2 inch forward of the hub

On Thu, Dec 12, 2019 at 2:52 PM Josh Muckley via CnC-List <
cnc-list@cnc-list.com> wrote:

> Do you grease it?  No disassembly?  No lip seals or ball bearings?  That's
> kinda remarkable!
>
> The 3 blade H5 is what was recommended to me... Most likely in 16".  ~2100
> GBP.
>
> Josh
>
> On Thu, Dec 12, 2019, 1:48 PM dwight veinot via CnC-List <
> cnc-list@cnc-list.com> wrote:
>
>> For Josh about my Bruntons Autoprop. It is the 3 blade H5. It was on
>> Alianna when I purchased her in 2005. So far i have replaced the hub zinc
>> once that’s all in 15 years of use in salt water. It is powered by a
>> Universal M4-30 and has strong reverse and powers Alianna a 35 MK2 at
>> around 14,000 pounds loaded for cruising well into seas and wind. I sail
>> with the transmission in forward and i can see a half knot or so speed
>> increase when it is locked in forward, for example from 6.4 to 6.9. I can
>> use that as a “passing gear” so that boats getting passed don’t know what
>> happened All of a sudden like. lol. And it is very quiet.
>>
>> On Thu, Dec 12, 2019 at 2:21 PM Josh Muckley via CnC-List <
>> cnc-list@cnc-list.com> wrote:
>>
>>> I tend to agree with the caveat that we are talking about boats that
>>> don't exceed 10 kts under motor.  Most of the manufacturers have provision
>>> for boats less than 10 and those greater than 10.  Obviously those greater
>>> than 10 are rare in the sailing community.
>>>
>>> Josh Muckley
>>> S/V Sea Hawk
>>> 1989 C 37+
>>> Solomons, MD
>>>
>>> On Thu, Dec 12, 2019, 10:42 AM Robert Boyer via CnC-List <
>>> cnc-list@cnc-list.com> wrote:
>>>
>>>> I don’t use the vent hose.  I do burp the shaft seal after a launch.  I
>>>> think having the vent hose adds an unnecessary risk and has very little, if
>>>> any, benefit.  Just my $0.02.
>>>>
>>>> Bob
>>>>
>>>> Bob Boyer
>>>> s/v Rainy Days
>>>> C Landfall 38 (Hull # 230)
>>>> (Presently in Baltimore for the summer)
>>>> blog: dainyrays.blogspot.com
>>>> email: dainyr...@icloud.com
>>>>
>>>> On Dec 11, 2019, at 5:31 PM, Marek Dziedzic via CnC-List <
>>>> cnc-list@cnc-list.com> wrote:
>>>>
>>>>  For a vented PYI, you need to make sure that the vent is high enough
>>>> above the water level or you risk getting burps of water if you need to go
>>>> into high reverse (e.g. when docking or emergency stopping). Some use a
>>>> bottle that collect these burps. I plumbed the vent into the sink drain. As
>>>> long as you open the drain occasionally, no issues.
>>>>
>>>> Marek
>>>>
>>>> 1994 C270 Legato
>>>> Ottawa, ON
>>>>
>>>>
>>>>  Original message 
>>>> From: Ken Heaton via CnC-List 
>>>> Date: 2019-12-11 10:57 (GMT-05:00)
>>>> To: cnc-list 
>>>> Cc: Ken Heaton 
>>>> Subject: Re: Stus-List Mechanical shaft seal options
>>>>
>>>> Is yours vented?  The vent was added some years ago. With it you never
>>>> need to burp the seal.  We don't have the vent so occasionally we do have
>>>> to burp it.  If I ever replace it I will put the same dripless, but with
>>>> the vent.
>>>>
>>>> Ken H.
>>>>
>>>> On Tue, 10 Dec 2019 at 13:48, Josh Muckley via CnC-List <
>>>> cnc-list@cnc-list.com> wrote:
>>>>
>>>>> Alright folks,
>>>>>
>>>>> I'm looking for thoughts on a replacement for my PYI dripless shaft
>>>>> seal.  It has worked fine and I'm not afraid to stick with it but I'm
>>>>> looking for possible options or improvements.
>>>>>
>>>>> I've heard of Tides Marine making one and Sailor Sam's sells 4
>>>>> different designs by the name Last Drop.
>>>>>
>>>>> I'll be pulling and truing the shaft, rebuilding the prop, replacing
>>>>> the cutlass bearing, replacing the seal.  Anything else I'm forgetting
>>>>> while I have it apart?
>>>>>
>>>>>
>>>>> Thanks,
>>>>> Josh Muckley
>>>>> S/V Sea Hawk
>>>

Re: Stus-List Mechanical shaft seal options

[Josh Muckley via CnC-List]

Do you grease it?  No disassembly?  No lip seals or ball bearings?  That's
kinda remarkable!

The 3 blade H5 is what was recommended to me... Most likely in 16".  ~2100
GBP.

Josh

On Thu, Dec 12, 2019, 1:48 PM dwight veinot via CnC-List <
cnc-list@cnc-list.com> wrote:

> For Josh about my Bruntons Autoprop. It is the 3 blade H5. It was on
> Alianna when I purchased her in 2005. So far i have replaced the hub zinc
> once that’s all in 15 years of use in salt water. It is powered by a
> Universal M4-30 and has strong reverse and powers Alianna a 35 MK2 at
> around 14,000 pounds loaded for cruising well into seas and wind. I sail
> with the transmission in forward and i can see a half knot or so speed
> increase when it is locked in forward, for example from 6.4 to 6.9. I can
> use that as a “passing gear” so that boats getting passed don’t know what
> happened All of a sudden like. lol. And it is very quiet.
>
> On Thu, Dec 12, 2019 at 2:21 PM Josh Muckley via CnC-List <
> cnc-list@cnc-list.com> wrote:
>
>> I tend to agree with the caveat that we are talking about boats that
>> don't exceed 10 kts under motor.  Most of the manufacturers have provision
>> for boats less than 10 and those greater than 10.  Obviously those greater
>> than 10 are rare in the sailing community.
>>
>> Josh Muckley
>> S/V Sea Hawk
>> 1989 C 37+
>> Solomons, MD
>>
>> On Thu, Dec 12, 2019, 10:42 AM Robert Boyer via CnC-List <
>> cnc-list@cnc-list.com> wrote:
>>
>>> I don’t use the vent hose.  I do burp the shaft seal after a launch.  I
>>> think having the vent hose adds an unnecessary risk and has very little, if
>>> any, benefit.  Just my $0.02.
>>>
>>> Bob
>>>
>>> Bob Boyer
>>> s/v Rainy Days
>>> C Landfall 38 (Hull # 230)
>>> (Presently in Baltimore for the summer)
>>> blog: dainyrays.blogspot.com
>>> email: dainyr...@icloud.com
>>>
>>> On Dec 11, 2019, at 5:31 PM, Marek Dziedzic via CnC-List <
>>> cnc-list@cnc-list.com> wrote:
>>>
>>>  For a vented PYI, you need to make sure that the vent is high enough
>>> above the water level or you risk getting burps of water if you need to go
>>> into high reverse (e.g. when docking or emergency stopping). Some use a
>>> bottle that collect these burps. I plumbed the vent into the sink drain. As
>>> long as you open the drain occasionally, no issues.
>>>
>>> Marek
>>>
>>> 1994 C270 Legato
>>> Ottawa, ON
>>>
>>>
>>>  Original message 
>>> From: Ken Heaton via CnC-List 
>>> Date: 2019-12-11 10:57 (GMT-05:00)
>>> To: cnc-list 
>>> Cc: Ken Heaton 
>>> Subject: Re: Stus-List Mechanical shaft seal options
>>>
>>> Is yours vented?  The vent was added some years ago. With it you never
>>> need to burp the seal.  We don't have the vent so occasionally we do have
>>> to burp it.  If I ever replace it I will put the same dripless, but with
>>> the vent.
>>>
>>> Ken H.
>>>
>>> On Tue, 10 Dec 2019 at 13:48, Josh Muckley via CnC-List <
>>> cnc-list@cnc-list.com> wrote:
>>>
>>>> Alright folks,
>>>>
>>>> I'm looking for thoughts on a replacement for my PYI dripless shaft
>>>> seal.  It has worked fine and I'm not afraid to stick with it but I'm
>>>> looking for possible options or improvements.
>>>>
>>>> I've heard of Tides Marine making one and Sailor Sam's sells 4
>>>> different designs by the name Last Drop.
>>>>
>>>> I'll be pulling and truing the shaft, rebuilding the prop, replacing
>>>> the cutlass bearing, replacing the seal.  Anything else I'm forgetting
>>>> while I have it apart?
>>>>
>>>>
>>>> Thanks,
>>>> Josh Muckley
>>>> S/V Sea Hawk
>>>> 1989 C 37+
>>>> Solomons, MD
>>>> ___
>>>>
>>>> Thanks everyone for supporting this list with your contributions.  Each
>>>> and every one is greatly appreciated.  If you want to support the list -
>>>> use PayPal to send contribution --   https://www.paypal.me/stumurray
>>>>
>>>> ___
>>>
>>> Thanks everyone for supporting this list with your contributions.  Each
>>> and every one is greatly appreciated.  If you want to support the list -
>>> use PayPal 

Re: Stus-List Mechanical shaft seal options

[dwight veinot via CnC-List]

For Josh about my Bruntons Autoprop. It is the 3 blade H5. It was on
Alianna when I purchased her in 2005. So far i have replaced the hub zinc
once that’s all in 15 years of use in salt water. It is powered by a
Universal M4-30 and has strong reverse and powers Alianna a 35 MK2 at
around 14,000 pounds loaded for cruising well into seas and wind. I sail
with the transmission in forward and i can see a half knot or so speed
increase when it is locked in forward, for example from 6.4 to 6.9. I can
use that as a “passing gear” so that boats getting passed don’t know what
happened All of a sudden like. lol. And it is very quiet.

On Thu, Dec 12, 2019 at 2:21 PM Josh Muckley via CnC-List <
cnc-list@cnc-list.com> wrote:

> I tend to agree with the caveat that we are talking about boats that don't
> exceed 10 kts under motor.  Most of the manufacturers have provision for
> boats less than 10 and those greater than 10.  Obviously those greater than
> 10 are rare in the sailing community.
>
> Josh Muckley
> S/V Sea Hawk
> 1989 C 37+
> Solomons, MD
>
> On Thu, Dec 12, 2019, 10:42 AM Robert Boyer via CnC-List <
> cnc-list@cnc-list.com> wrote:
>
>> I don’t use the vent hose.  I do burp the shaft seal after a launch.  I
>> think having the vent hose adds an unnecessary risk and has very little, if
>> any, benefit.  Just my $0.02.
>>
>> Bob
>>
>> Bob Boyer
>> s/v Rainy Days
>> C Landfall 38 (Hull # 230)
>> (Presently in Baltimore for the summer)
>> blog: dainyrays.blogspot.com
>> email: dainyr...@icloud.com
>>
>> On Dec 11, 2019, at 5:31 PM, Marek Dziedzic via CnC-List <
>> cnc-list@cnc-list.com> wrote:
>>
>>  For a vented PYI, you need to make sure that the vent is high enough
>> above the water level or you risk getting burps of water if you need to go
>> into high reverse (e.g. when docking or emergency stopping). Some use a
>> bottle that collect these burps. I plumbed the vent into the sink drain. As
>> long as you open the drain occasionally, no issues.
>>
>> Marek
>>
>> 1994 C270 Legato
>> Ottawa, ON
>>
>>
>>  Original message 
>> From: Ken Heaton via CnC-List 
>> Date: 2019-12-11 10:57 (GMT-05:00)
>> To: cnc-list 
>> Cc: Ken Heaton 
>> Subject: Re: Stus-List Mechanical shaft seal options
>>
>> Is yours vented?  The vent was added some years ago. With it you never
>> need to burp the seal.  We don't have the vent so occasionally we do have
>> to burp it.  If I ever replace it I will put the same dripless, but with
>> the vent.
>>
>> Ken H.
>>
>> On Tue, 10 Dec 2019 at 13:48, Josh Muckley via CnC-List <
>> cnc-list@cnc-list.com> wrote:
>>
>>> Alright folks,
>>>
>>> I'm looking for thoughts on a replacement for my PYI dripless shaft
>>> seal.  It has worked fine and I'm not afraid to stick with it but I'm
>>> looking for possible options or improvements.
>>>
>>> I've heard of Tides Marine making one and Sailor Sam's sells 4 different
>>> designs by the name Last Drop.
>>>
>>> I'll be pulling and truing the shaft, rebuilding the prop, replacing the
>>> cutlass bearing, replacing the seal.  Anything else I'm forgetting while I
>>> have it apart?
>>>
>>>
>>> Thanks,
>>> Josh Muckley
>>> S/V Sea Hawk
>>> 1989 C 37+
>>> Solomons, MD
>>> ___
>>>
>>> Thanks everyone for supporting this list with your contributions.  Each
>>> and every one is greatly appreciated.  If you want to support the list -
>>> use PayPal to send contribution --   https://www.paypal.me/stumurray
>>>
>>> ___
>>
>> Thanks everyone for supporting this list with your contributions.  Each
>> and every one is greatly appreciated.  If you want to support the list -
>> use PayPal to send contribution --   https://www.paypal.me/stumurray
>>
>> ___
>>
>> Thanks everyone for supporting this list with your contributions.  Each
>> and every one is greatly appreciated.  If you want to support the list -
>> use PayPal to send contribution --   https://www.paypal.me/stumurray
>>
>> ___
>
> Thanks everyone for supporting this list with your contributions.  Each
> and every one is greatly appreciated.  If you want to support the list -
> use PayPal to send contribution --   https://www.paypal.me/stumurray
>
> --
Sent from Gmail Mobile
___

Thanks everyone for supporting this list with your contributions.  Each and 
every one is greatly appreciated.  If you want to support the list - use PayPal 
to send contribution --   https://www.paypal.me/stumurray

Re: Stus-List Mechanical shaft seal options

[Josh Muckley via CnC-List]

I tend to agree with the caveat that we are talking about boats that don't
exceed 10 kts under motor.  Most of the manufacturers have provision for
boats less than 10 and those greater than 10.  Obviously those greater than
10 are rare in the sailing community.

Josh Muckley
S/V Sea Hawk
1989 C 37+
Solomons, MD

On Thu, Dec 12, 2019, 10:42 AM Robert Boyer via CnC-List <
cnc-list@cnc-list.com> wrote:

> I don’t use the vent hose.  I do burp the shaft seal after a launch.  I
> think having the vent hose adds an unnecessary risk and has very little, if
> any, benefit.  Just my $0.02.
>
> Bob
>
> Bob Boyer
> s/v Rainy Days
> C Landfall 38 (Hull # 230)
> (Presently in Baltimore for the summer)
> blog: dainyrays.blogspot.com
> email: dainyr...@icloud.com
>
> On Dec 11, 2019, at 5:31 PM, Marek Dziedzic via CnC-List <
> cnc-list@cnc-list.com> wrote:
>
>  For a vented PYI, you need to make sure that the vent is high enough
> above the water level or you risk getting burps of water if you need to go
> into high reverse (e.g. when docking or emergency stopping). Some use a
> bottle that collect these burps. I plumbed the vent into the sink drain. As
> long as you open the drain occasionally, no issues.
>
> Marek
>
> 1994 C270 Legato
> Ottawa, ON
>
>
>  Original message 
> From: Ken Heaton via CnC-List 
> Date: 2019-12-11 10:57 (GMT-05:00)
> To: cnc-list 
> Cc: Ken Heaton 
> Subject: Re: Stus-List Mechanical shaft seal options
>
> Is yours vented?  The vent was added some years ago. With it you never
> need to burp the seal.  We don't have the vent so occasionally we do have
> to burp it.  If I ever replace it I will put the same dripless, but with
> the vent.
>
> Ken H.
>
> On Tue, 10 Dec 2019 at 13:48, Josh Muckley via CnC-List <
> cnc-list@cnc-list.com> wrote:
>
>> Alright folks,
>>
>> I'm looking for thoughts on a replacement for my PYI dripless shaft
>> seal.  It has worked fine and I'm not afraid to stick with it but I'm
>> looking for possible options or improvements.
>>
>> I've heard of Tides Marine making one and Sailor Sam's sells 4 different
>> designs by the name Last Drop.
>>
>> I'll be pulling and truing the shaft, rebuilding the prop, replacing the
>> cutlass bearing, replacing the seal.  Anything else I'm forgetting while I
>> have it apart?
>>
>>
>> Thanks,
>> Josh Muckley
>> S/V Sea Hawk
>> 1989 C 37+
>> Solomons, MD
>> ___
>>
>> Thanks everyone for supporting this list with your contributions.  Each
>> and every one is greatly appreciated.  If you want to support the list -
>> use PayPal to send contribution --   https://www.paypal.me/stumurray
>>
>> ___
>
> Thanks everyone for supporting this list with your contributions.  Each
> and every one is greatly appreciated.  If you want to support the list -
> use PayPal to send contribution --   https://www.paypal.me/stumurray
>
> ___
>
> Thanks everyone for supporting this list with your contributions.  Each
> and every one is greatly appreciated.  If you want to support the list -
> use PayPal to send contribution --   https://www.paypal.me/stumurray
>
>
___

Thanks everyone for supporting this list with your contributions.  Each and 
every one is greatly appreciated.  If you want to support the list - use PayPal 
to send contribution --   https://www.paypal.me/stumurray

Re: Stus-List Mechanical shaft seal options

[Josh Muckley via CnC-List]

Just a week ago a dock neighbor of ours had this exact twisting action
completely separate their bellows on a PYI seal.  The only indication of a
problem from the helm was the fwap, fwap, fwap sound of the vent hose
whipping around and hitting the inside of the hull.  Evidently the
stainless ring a lightly seized to the carbon ring.  Seized together the
carbon ring rotated with the shaft and twisted up the vent hose until the
slack was out and then amputated the vent at its remote barb fitting.
Fortunately enough, a remarkably small amount of flooding occurred.  When
the seal was righted in its orientation the leak stopped almost completely
despite the circumferential tear.  The owner knew that the seal needed
replaced and in fact was about to depart for the boat yard just a few
hundred yards away so that they could have the seal replaced during the
winter.  His other shaft seal looked just about as bad too!

On the PYI seals and others with a bellows design, the service life is
typically 3 to 5 years before recommended replacement.  The bellows has to
be flexible so a thinner material is used.  Of course the constant stress
of compressing the bellows is an additional factor degrading the rubber.
In the case of PYI this $2 piece of hose costs ~$100.

In the case of the Lasdrop Gen 2 the $2 hose is ridged and thick to resist
the compression of the SS spring in the seal pack.  The service interval is
8 to 10 years.


If I was to go back to a packing style seal what would be involved?


Josh Muckley
S/V Sea Hawk
1989 C 37+
Solomons, MD

On Thu, Dec 12, 2019, 12:17 PM Len Mitchell via CnC-List <
cnc-list@cnc-list.com> wrote:

> Josh, Shawn is correct. The 6 inch or so piece of hose on the original
> packing gland. I would bet a high number of boats still have it in service.
> Mine was 20 years old when I replaced it and the outer rubber layer had
> cracks in it. There isn’t a lot of water pressure on it but it gets a
> little twisting force. Any original rubber hose should be gone by now. Len
>
> Sent from my iPad
> ___
>
> Thanks everyone for supporting this list with your contributions.  Each
> and every one is greatly appreciated.  If you want to support the list -
> use PayPal to send contribution --   https://www.paypal.me/stumurray
>
>
___

Thanks everyone for supporting this list with your contributions.  Each and 
every one is greatly appreciated.  If you want to support the list - use PayPal 
to send contribution --   https://www.paypal.me/stumurray

Stus-List Mechanical shaft seal options

[Len Mitchell via CnC-List]

Josh, Shawn is correct. The 6 inch or so piece of hose on the original packing 
gland. I would bet a high number of boats still have it in service. Mine was 20 
years old when I replaced it and the outer rubber layer had cracks in it. There 
isn’t a lot of water pressure on it but it gets a little twisting force. Any 
original rubber hose should be gone by now. Len

Sent from my iPad
___

Thanks everyone for supporting this list with your contributions.  Each and 
every one is greatly appreciated.  If you want to support the list - use PayPal 
to send contribution --   https://www.paypal.me/stumurray

Re: Stus-List Mechanical shaft seal options

[Shawn Wright via CnC-List]

I think he means the short piece of hose that goes from the hull tube
flange to the seal carrier (just guessing at the names here). I suspect the
biggest risk is if the seal is too tight and binds, it can place too much
twist force on the hose, spinning it off or cracking it.

Another short piece of hose I know needs to be replaced on my 35-2 is
between the two water tanks under the settee - looks really old and
brittle, but also a real bear to replace in such a tight space. And of
course the tank filler hose disappears behind the fixed seatbacks, along
with the AC wiring. I've already ordered new 14/3 wire and will be
abandoning the old paper insulated AC wires asap.
--
Shawn Wright
shawngwri...@gmail.com
S/V Callisto, 1974 C 35
https://www.facebook.com/SVCallisto


On Wed, Dec 11, 2019 at 9:28 PM Josh Muckley via CnC-List <
cnc-list@cnc-list.com> wrote:

> I'm not sure I understand what $2 hose you are talking about?
>
> Josh
>
> On Wed, Dec 11, 2019, 8:16 PM Len Mitchell via CnC-List <
> cnc-list@cnc-list.com> wrote:
>
>> How many boats still have the original $2 piece of rubber hose in service
>> after 30 plus years? I bet the number is high. I haven’t heard of anyone
>> sinking due to a shaft seal hose breakdown but why risk it for $2. Len
>>
>> Sent from my mobile device.
>> ___
>>
>> Thanks everyone for supporting this list with your contributions.  Each
>> and every one is greatly appreciated.  If you want to support the list -
>> use PayPal to send contribution --   https://www.paypal.me/stumurray
>>
>> ___
>
> Thanks everyone for supporting this list with your contributions.  Each
> and every one is greatly appreciated.  If you want to support the list -
> use PayPal to send contribution --   https://www.paypal.me/stumurray
>
>
___

Thanks everyone for supporting this list with your contributions.  Each and 
every one is greatly appreciated.  If you want to support the list - use PayPal 
to send contribution --   https://www.paypal.me/stumurray

Re: Stus-List Mechanical shaft seal options

[Robert Boyer via CnC-List]

I don’t use the vent hose.  I do burp the shaft seal after a launch.  I think 
having the vent hose adds an unnecessary risk and has very little, if any, 
benefit.  Just my $0.02.

Bob

Bob Boyer
s/v Rainy Days
C Landfall 38 (Hull # 230)
(Presently in Baltimore for the summer)
blog: dainyrays.blogspot.com
email: dainyr...@icloud.com

> On Dec 11, 2019, at 5:31 PM, Marek Dziedzic via CnC-List 
>  wrote:
> 
>  For a vented PYI, you need to make sure that the vent is high enough above 
> the water level or you risk getting burps of water if you need to go into 
> high reverse (e.g. when docking or emergency stopping). Some use a bottle 
> that collect these burps. I plumbed the vent into the sink drain. As long as 
> you open the drain occasionally, no issues. 
> 
> Marek 
> 
> 1994 C270 Legato 
> Ottawa, ON 
> 
> 
>  Original message 
> From: Ken Heaton via CnC-List 
> Date: 2019-12-11 10:57 (GMT-05:00)
> To: cnc-list 
> Cc: Ken Heaton 
> Subject: Re: Stus-List Mechanical shaft seal options
> 
> Is yours vented?  The vent was added some years ago. With it you never need 
> to burp the seal.  We don't have the vent so occasionally we do have to burp 
> it.  If I ever replace it I will put the same dripless, but with the vent.
> 
> Ken H.
> 
>> On Tue, 10 Dec 2019 at 13:48, Josh Muckley via CnC-List 
>>  wrote:
>> Alright folks,
>> 
>> I'm looking for thoughts on a replacement for my PYI dripless shaft seal.  
>> It has worked fine and I'm not afraid to stick with it but I'm looking for 
>> possible options or improvements.
>> 
>> I've heard of Tides Marine making one and Sailor Sam's sells 4 different 
>> designs by the name Last Drop.
>> 
>> I'll be pulling and truing the shaft, rebuilding the prop, replacing the 
>> cutlass bearing, replacing the seal.  Anything else I'm forgetting while I 
>> have it apart? 
>> 
>> 
>> Thanks, 
>> Josh Muckley 
>> S/V Sea Hawk 
>> 1989 C 37+
>> Solomons, MD
>> ___
>> 
>> Thanks everyone for supporting this list with your contributions.  Each and 
>> every one is greatly appreciated.  If you want to support the list - use 
>> PayPal to send contribution --   https://www.paypal.me/stumurray
>> 
> ___
> 
> Thanks everyone for supporting this list with your contributions.  Each and 
> every one is greatly appreciated.  If you want to support the list - use 
> PayPal to send contribution --   https://www.paypal.me/stumurray
> 
___

Thanks everyone for supporting this list with your contributions.  Each and 
every one is greatly appreciated.  If you want to support the list - use PayPal 
to send contribution --   https://www.paypal.me/stumurray

Re: Stus-List Mechanical shaft seal options

[Josh Muckley via CnC-List]

I'm not sure I understand what $2 hose you are talking about?

Josh

On Wed, Dec 11, 2019, 8:16 PM Len Mitchell via CnC-List <
cnc-list@cnc-list.com> wrote:

> How many boats still have the original $2 piece of rubber hose in service
> after 30 plus years? I bet the number is high. I haven’t heard of anyone
> sinking due to a shaft seal hose breakdown but why risk it for $2. Len
>
> Sent from my mobile device.
> ___
>
> Thanks everyone for supporting this list with your contributions.  Each
> and every one is greatly appreciated.  If you want to support the list -
> use PayPal to send contribution --   https://www.paypal.me/stumurray
>
>
___

Thanks everyone for supporting this list with your contributions.  Each and 
every one is greatly appreciated.  If you want to support the list - use PayPal 
to send contribution --   https://www.paypal.me/stumurray

Re: Stus-List Mechanical shaft seal options

[Shawn Wright via CnC-List]

Interesting discussion. I have the old school packing, which seemed fine
after we bought her and launched in June. But I do see a fair amount of
salt crystals behind the engine, so I now wonder how much it drips. Access
is pretty tight, but I will try to have a look next time we're motoring for
a while.

--
Shawn Wright
shawngwri...@gmail.com
S/V Callisto, 1974 C 35
https://www.facebook.com/SVCallisto


On Wed, Dec 11, 2019 at 3:35 PM CHARLES SCHEAFFER via CnC-List <
cnc-list@cnc-list.com> wrote:

> FWIW, I think the dripless seals are overrated.  I've had my boat 18 years
> with the packing from the previous owner and I've never tightened the
> packing gland.  After a relaunch, a Yanmar engine mechanic cautioned me
> from tightening the packing nut for three days after a launch.  He said
> wait three days for the boat to return to floating geometry and it worked.
> It leaks for a few days after launch and then returns to spec, dripping
> slightly during run and no drip when shaft is still.   Since I haven't
> taken it apart I can't say what it is, but as an HVAC mechanic who worked
> on many large pumps with carbon ring seals w SS springs, leaks were usually
> caused when carbon rings cracked.  Carbon is brittle and they were either
> tight or leaking and didn't allow you to tighten the gland nut like old
> style packing.
>
> If I ever replace the packing on my boat it will probably be with the
> synthetic stuff that still allows me to tighten the packing nut.
>
> Chuck
>
>
>
> On December 11, 2019 at 11:11 AM Josh Muckley via CnC-List <
> cnc-list@cnc-list.com> wrote: e
> Yep vented.
>
> The PYI and Lasdrop seals rated the highest in a practical sailor review.
> The lasdrop gen 2 has the ability to store a spare seal on the shaft and
> the rated service life is 8 to 10 years.
>
> I'm leaning towards the Lasdrop Gen 2 for my installation though I'm
> tempted to keep the PYI.  The new bellows kit is 1/3 of the price of the
> new lasdrop seal.
>
> https://www.practical-sailor.com/issues/26_22/features/4431-1.html
>
> I'm also considering a new auto prop instead of paying to get my max-prop
> rebuilt.
>
> Josh
>
> On Wed, Dec 11, 2019, 10:56 AM Ken Heaton < kenhea...@gmail.com> wrote:
>
> Is yours vented?  The vent was added some years ago. With it you never
> need to burp the seal.  We don't have the vent so occasionally we do have
> to burp it.  If I ever replace it I will put the same dripless, but with
> the vent.
>
> Ken H.
>
> On Tue, 10 Dec 2019 at 13:48, Josh Muckley via CnC-List <
> cnc-list@cnc-list.com> wrote:
>
> Alright folks,
>
> I'm looking for thoughts on a replacement for my PYI dripless shaft seal.
> It has worked fine and I'm not afraid to stick with it but I'm looking for
> possible options or improvements.
>
> I've heard of Tides Marine making one and Sailor Sam's sells 4 different
> designs by the name Last Drop.
>
> I'll be pulling and truing the shaft, rebuilding the prop, replacing the
> cutlass bearing, replacing the seal.  Anything else I'm forgetting while I
> have it apart?
>
>
> Thanks,
> Josh Muckley
> S/V Sea Hawk
> 1989 C 37+
> Solomons, MD
> ___
>
> Thanks everyone for supporting this list with your contributions.  Each
> and every one is greatly appreciated.  If you want to support the list -
> use PayPal to send contribution --https://www.paypal.me/stumurray
>
> ___
>
> Thanks everyone for supporting this list with your contributions. Each and
> every one is greatly appreciated. If you want to support the list - use
> PayPal to send contribution -- https://www.paypal.me/stumurray
>
>
>
> ___
>
> Thanks everyone for supporting this list with your contributions.  Each
> and every one is greatly appreciated.  If you want to support the list -
> use PayPal to send contribution --   https://www.paypal.me/stumurray
>
>
___

Thanks everyone for supporting this list with your contributions.  Each and 
every one is greatly appreciated.  If you want to support the list - use PayPal 
to send contribution --   https://www.paypal.me/stumurray

Re: Stus-List Mechanical shaft seal options

[Marek Dziedzic via CnC-List]

What you describe sounds like a PYI shaft retention collar. I think it is a 
great addition to the PYI dripless, because it can grab the shaft quite well 
(as opposed to the retention screws that are supposed to tap into the shaft 
through the original collar). I know of people who use an extra hose clamp for 
the same purpose. Not as good but saves you about $30. I have the retention 
collar.

Marek

From: CnC-List On Behalf Of WILLIAM WALKER via CnC-List
Sent: 11 December, 2019 19:32
To: cnc-list@cnc-list.com
Cc: WILLIAM WALKER 
Subject: Re: Stus-List Mechanical shaft seal options


Josh,
   I don't have my PSS manual here in Ohio, but basically it is a two part ring 
that clamps around the shaft and carries two o rings inside.
It also acts to prevent shaft from going out the back of the boat if the shaft 
coupler let's go.
I have never actually used the replacement o rings, but did re install it 
several years ago when replaced my shaft and coupler.
Bill


On Wednesday, December 11, 2019 Josh Muckley via CnC-List 
mailto:cnc-list@cnc-list.com>> wrote:
Bill,

I'm curious how that works having a spare seal?

As far as I can tell, the primary failure mechanism for the PYI is the bellows. 
 It's hard to keep a spare of one of those.

The Lasdrop Gen 2 has a semi rigid hose instead of a bellows and terminates 
with a SS plate which stays stationary.  The carbon ring is mounted to the 
shaft in a manner which does not damage the shaft.  This leaves the carbon ring 
as the rotating piece.  In the gen 2 the rotating part attached to the shaft is 
also a spring pack which is how compression is maintained.  Since it is a 
spring it is also less prone to relaxing over time such as a typical bellows 
system.

Josh



On Wed, Dec 11, 2019, 2:21 PM WILLIAM WALKER via CnC-List 
mailto:cnc-list@cnc-list.com>> wrote:

Josh,
   The PYI seal also is capable of storing a spare seal on the shaft in front 
of the seal.  I have one.
Bill Walker
C & C 36
Evening Star
Pentwater, Michigan


On Wednesday, December 11, 2019 Josh Muckley via CnC-List 
mailto:cnc-list@cnc-list.com>> wrote:
Yep vented.

The PYI and Lasdrop seals rated the highest in a practical sailor review.  The 
lasdrop gen 2 has the ability to store a spare seal on the shaft and the rated 
service life is 8 to 10 years.

I'm leaning towards the Lasdrop Gen 2 for my installation though I'm tempted to 
keep the PYI.  The new bellows kit is 1/3 of the price of the new lasdrop seal.

https://www.practical-sailor.com/issues/26_22/features/4431-1.html

I'm also considering a new auto prop instead of paying to get my max-prop 
rebuilt.

Josh

On Wed, Dec 11, 2019, 10:56 AM Ken Heaton 
mailto:kenhea...@gmail.com>> wrote:
Is yours vented?  The vent was added some years ago. With it you never need to 
burp the seal.  We don't have the vent so occasionally we do have to burp it.  
If I ever replace it I will put the same dripless, but with the vent.

Ken H.

On Tue, 10 Dec 2019 at 13:48, Josh Muckley via CnC-List 
mailto:cnc-list@cnc-list.com>> wrote:
Alright folks,

I'm looking for thoughts on a replacement for my PYI dripless shaft seal.  It 
has worked fine and I'm not afraid to stick with it but I'm looking for 
possible options or improvements.

I've heard of Tides Marine making one and Sailor Sam's sells 4 different 
designs by the name Last Drop.

I'll be pulling and truing the shaft, rebuilding the prop, replacing the 
cutlass bearing, replacing the seal.  Anything else I'm forgetting while I have 
it apart?


Thanks,
Josh Muckley
S/V Sea Hawk
1989 C 37+
Solomons, MD
___

Thanks everyone for supporting this list with your contributions.  Each and 
every one is greatly appreciated.  If you want to support the list - use PayPal 
to send contribution --   https://www.paypal.me/stumurray

___

Thanks everyone for supporting this list with your contributions.  Each and 
every one is greatly appreciated.  If you want to support the list - use PayPal 
to send contribution --  https://www.paypal.me/stumurray
___

Thanks everyone for supporting this list with your contributions.  Each and 
every one is greatly appreciated.  If you want to support the list - use PayPal 
to send contribution --   https://www.paypal.me/stumurray
___

Thanks everyone for supporting this list with your contributions.  Each and 
every one is greatly appreciated.  If you want to support the list - use PayPal 
to send contribution --  https://www.paypal.me/stumurray
___

Thanks everyone for supporting this list with your contributions.  Each and 
every one is greatly appreciated.  If you want to support the list - use PayPal 
to send contribution --   https://www.paypal.me/stumurray

Stus-List Mechanical shaft seal options

[Len Mitchell via CnC-List]

How many boats still have the original $2 piece of rubber hose in service after 
30 plus years? I bet the number is high. I haven’t heard of anyone sinking due 
to a shaft seal hose breakdown but why risk it for $2. Len

Sent from my mobile device. 
___

Thanks everyone for supporting this list with your contributions.  Each and 
every one is greatly appreciated.  If you want to support the list - use PayPal 
to send contribution --   https://www.paypal.me/stumurray

Re: Stus-List Mechanical shaft seal options

[WILLIAM WALKER via CnC-List]

Josh,
   I don't have my PSS manual here in Ohio, but basically it is a two part ring 
that clamps around the shaft and carries two o rings inside. 
It also acts to prevent shaft from going out the back of the boat if the shaft 
coupler let's go.
I have never actually used the replacement o rings, but did re install it 
several years ago when replaced my shaft and coupler.
Bill
On Wednesday, December 11, 2019 Josh Muckley via CnC-List 
 wrote:
Bill,
I'm curious how that works having a spare seal?
As far as I can tell, the primary failure mechanism for the PYI is the bellows. 
 It's hard to keep a spare of one of those.
The Lasdrop Gen 2 has a semi rigid hose instead of a bellows and terminates 
with a SS plate which stays stationary.  The carbon ring is mounted to the 
shaft in a manner which does not damage the shaft.  This leaves the carbon ring 
as the rotating piece.  In the gen 2 the rotating part attached to the shaft is 
also a spring pack which is how compression is maintained.  Since it is a 
spring it is also less prone to relaxing over time such as a typical bellows 
system. 
Josh 



On Wed, Dec 11, 2019, 2:21 PM WILLIAM WALKER via CnC-List 
 wrote:


Josh,
   The PYI seal also is capable of storing a spare seal on the shaft in front 
of the seal.  I have one.
Bill Walker
C & C 36
Evening Star
Pentwater, Michigan
On Wednesday, December 11, 2019 Josh Muckley via CnC-List 
 wrote:
Yep vented.
The PYI and Lasdrop seals rated the highest in a practical sailor review.  The 
lasdrop gen 2 has the ability to store a spare seal on the shaft and the rated 
service life is 8 to 10 years.
I'm leaning towards the Lasdrop Gen 2 for my installation though I'm tempted to 
keep the PYI.  The new bellows kit is 1/3 of the price of the new lasdrop seal.
https://www.practical-sailor.com/issues/26_22/features/4431-1.html

I'm also considering a new auto prop instead of paying to get my max-prop 
rebuilt.
Josh
On Wed, Dec 11, 2019, 10:56 AM Ken Heaton  wrote:

Is yours vented?  The vent was added some years ago. With it you never need to 
burp the seal.  We don't have the vent so occasionally we do have to burp it.  
If I ever replace it I will put the same dripless, but with the vent.
Ken H.
On Tue, 10 Dec 2019 at 13:48, Josh Muckley via CnC-List  
wrote:

Alright folks,
I'm looking for thoughts on a replacement for my PYI dripless shaft seal.  It 
has worked fine and I'm not afraid to stick with it but I'm looking for 
possible options or improvements.
I've heard of Tides Marine making one and Sailor Sam's sells 4 different 
designs by the name Last Drop.
I'll be pulling and truing the shaft, rebuilding the prop, replacing the 
cutlass bearing, replacing the seal.  Anything else I'm forgetting while I have 
it apart? 

Thanks, Josh Muckley S/V Sea Hawk 1989 C 37+Solomons, 
MD___

Thanks everyone for supporting this list with your contributions.  Each and 
every one is greatly appreciated.  If you want to support the list - use PayPal 
to send contribution --   https://www.paypal.me/stumurray



___

Thanks everyone for supporting this list with your contributions.  Each and 
every one is greatly appreciated.  If you want to support the list - use PayPal 
to send contribution --  https://www.paypal.me/stumurray

___

Thanks everyone for supporting this list with your contributions.  Each and 
every one is greatly appreciated.  If you want to support the list - use PayPal 
to send contribution --   https://www.paypal.me/stumurray


___

Thanks everyone for supporting this list with your contributions.  Each and 
every one is greatly appreciated.  If you want to support the list - use PayPal 
to send contribution --  https://www.paypal.me/stumurray

___

Thanks everyone for supporting this list with your contributions.  Each and 
every one is greatly appreciated.  If you want to support the list - use PayPal 
to send contribution --   https://www.paypal.me/stumurray

Stus-List Mechanical shaft seal options

[Robert Abbott via CnC-List]

I have a stuffing boxrepacked 10 years ago with a synthetic 
packingsame as Chuckdry when shaft not spinning, drip when 
motoring...have not tightened the packing since installing.


Can't even imagine when I have to ever replace the synthetic stuffing.


Rob Abbott
AZURA
C 32 - #277
Halifax, N.S.

On 12/11/2019 7:34 PM, CHARLES SCHEAFFER via CnC-List wrote:
FWIW, I think the dripless seals are overrated.  I've had my boat 18 
years with the packing from the previous owner and I've never 
tightened the packing gland.  After a relaunch, a Yanmar engine 
mechanic cautioned me from tightening the packing nut for three days 
after a launch. He said wait three days for the boat to return to 
floating geometry and it worked.  It leaks for a few days after launch 
and then returns to spec, dripping slightly during run and no drip 
when shaft is still.   Since I haven't taken it apart I can't say what 
it is, but as an HVAC mechanic who worked on many large pumps with 
carbon ring seals w SS springs, leaks were usually caused when carbon 
rings cracked.  Carbon is brittle and they were either tight or 
leaking and didn't allow you to tighten the gland nut like old style 
packing.


If I ever replace the packing on my boat it will probably be with the 
synthetic stuff that still allows me to tighten the packing nut.


Chuck




___

Thanks everyone for supporting this list with your contributions.  Each and 
every one is greatly appreciated.  If you want to support the list - use PayPal 
to send contribution --   https://www.paypal.me/stumurray

Re: Stus-List Mechanical shaft seal options

[CHARLES SCHEAFFER via CnC-List]

FWIW, I think the dripless seals are overrated.  I've had my boat 18 years with 
the packing from the previous owner and I've never tightened the packing gland. 
 After a relaunch, a Yanmar engine mechanic cautioned me from tightening the 
packing nut for three days after a launch.  He said wait three days for the 
boat to return to floating geometry and it worked.  It leaks for a few days 
after launch and then returns to spec, dripping slightly during run and no drip 
when shaft is still.   Since I haven't taken it apart I can't say what it is, 
but as an HVAC mechanic who worked on many large pumps with carbon ring seals w 
SS springs, leaks were usually caused when carbon rings cracked.  Carbon is 
brittle and they were either tight or leaking and didn't allow you to tighten 
the gland nut like old style packing.  

If I ever replace the packing on my boat it will probably be with the synthetic 
stuff that still allows me to tighten the packing nut.

Chuck



> On December 11, 2019 at 11:11 AM Josh Muckley via CnC-List 
>  wrote: e
> Yep vented.
> 
> The PYI and Lasdrop seals rated the highest in a practical sailor review. 
>  The lasdrop gen 2 has the ability to store a spare seal on the shaft and the 
> rated service life is 8 to 10 years.
> 
> I'm leaning towards the Lasdrop Gen 2 for my installation though I'm 
> tempted to keep the PYI.  The new bellows kit is 1/3 of the price of the new 
> lasdrop seal.
> 
> https://www.practical-sailor.com/issues/26_22/features/4431-1.html
> 
> I'm also considering a new auto prop instead of paying to get my max-prop 
> rebuilt.
> 
> Josh
> 
> On Wed, Dec 11, 2019, 10:56 AM Ken Heaton < kenhea...@gmail.com 
> mailto:kenhea...@gmail.com > wrote:
> 
> > > Is yours vented?  The vent was added some years ago. With 
> it you never need to burp the seal.  We don't have the vent so occasionally 
> we do have to burp it.  If I ever replace it I will put the same dripless, 
> but with the vent.
> > 
> > Ken H.
> > 
> > On Tue, 10 Dec 2019 at 13:48, Josh Muckley via CnC-List < 
> > cnc-list@cnc-list.com mailto:cnc-list@cnc-list.com > wrote:
> > 
> > > > > Alright folks,
> > > 
> > > I'm looking for thoughts on a replacement for my PYI dripless 
> > > shaft seal.  It has worked fine and I'm not afraid to stick with it but 
> > > I'm looking for possible options or improvements.
> > > 
> > > I've heard of Tides Marine making one and Sailor Sam's sells 
> > > 4 different designs by the name Last Drop.
> > > 
> > > I'll be pulling and truing the shaft, rebuilding the prop, 
> > > replacing the cutlass bearing, replacing the seal.  Anything else I'm 
> > > forgetting while I have it apart? 
> > > 
> > > 
> > > Thanks, 
> > > Josh Muckley 
> > > S/V Sea Hawk 
> > > 1989 C 37+
> > > Solomons, MD
> > > ___
> > > 
> > > Thanks everyone for supporting this list with your 
> > > contributions.  Each and every one is greatly appreciated.  If you want 
> > > to support the list - use PayPal to send contribution --
> > > https://www.paypal.me/stumurray
> > > 
> > > 
> > > > > 
> > > ___
> 
> Thanks everyone for supporting this list with your contributions. Each 
> and every one is greatly appreciated. If you want to support the list - use 
> PayPal to send contribution -- https://www.paypal.me/stumurray
> 
> 


___

Thanks everyone for supporting this list with your contributions.  Each and 
every one is greatly appreciated.  If you want to support the list - use PayPal 
to send contribution --   https://www.paypal.me/stumurray

Re: Stus-List Mechanical shaft seal options

[Marek Dziedzic via CnC-List]

For a vented PYI, you need to make sure that the vent is high enough above the 
water level or you risk getting burps of water if you need to go into high 
reverse (e.g. when docking or emergency stopping). Some use a bottle that 
collect these burps. I plumbed the vent into the sink drain. As long as you 
open the drain occasionally, no issues.

Marek

1994 C270 Legato
Ottawa, ON


 Original message 
From: Ken Heaton via CnC-List 
Date: 2019-12-11 10:57 (GMT-05:00)
To: cnc-list 
Cc: Ken Heaton 
Subject: Re: Stus-List Mechanical shaft seal options

Is yours vented?  The vent was added some years ago. With it you never need to 
burp the seal.  We don't have the vent so occasionally we do have to burp it.  
If I ever replace it I will put the same dripless, but with the vent.

Ken H.

On Tue, 10 Dec 2019 at 13:48, Josh Muckley via CnC-List 
mailto:cnc-list@cnc-list.com>> wrote:
Alright folks,

I'm looking for thoughts on a replacement for my PYI dripless shaft seal.  It 
has worked fine and I'm not afraid to stick with it but I'm looking for 
possible options or improvements.

I've heard of Tides Marine making one and Sailor Sam's sells 4 different 
designs by the name Last Drop.

I'll be pulling and truing the shaft, rebuilding the prop, replacing the 
cutlass bearing, replacing the seal.  Anything else I'm forgetting while I have 
it apart?


Thanks,
Josh Muckley
S/V Sea Hawk
1989 C 37+
Solomons, MD
___

Thanks everyone for supporting this list with your contributions.  Each and 
every one is greatly appreciated.  If you want to support the list - use PayPal 
to send contribution --   https://www.paypal.me/stumurray

___

Thanks everyone for supporting this list with your contributions.  Each and 
every one is greatly appreciated.  If you want to support the list - use PayPal 
to send contribution --   https://www.paypal.me/stumurray

Re: Stus-List Mechanical shaft seal options

[Josh Muckley via CnC-List]

Bill,

I'm curious how that works having a spare seal?

As far as I can tell, the primary failure mechanism for the PYI is the
bellows.  It's hard to keep a spare of one of those.

The Lasdrop Gen 2 has a semi rigid hose instead of a bellows and terminates
with a SS plate which stays stationary.  The carbon ring is mounted to the
shaft in a manner which does not damage the shaft.  This leaves the carbon
ring as the rotating piece.  In the gen 2 the rotating part attached to the
shaft is also a spring pack which is how compression is maintained.  Since
it is a spring it is also less prone to relaxing over time such as a
typical bellows system.

Josh




On Wed, Dec 11, 2019, 2:21 PM WILLIAM WALKER via CnC-List <
cnc-list@cnc-list.com> wrote:

> Josh,
>The PYI seal also is capable of storing a spare seal on the shaft in
> front of the seal.  I have one.
> Bill Walker
> C & C 36
> Evening Star
> Pentwater, Michigan
> --
> On Wednesday, December 11, 2019 Josh Muckley via CnC-List <
> cnc-list@cnc-list.com> wrote:
> Yep vented.
>
> The PYI and Lasdrop seals rated the highest in a practical sailor review.
> The lasdrop gen 2 has the ability to store a spare seal on the shaft and
> the rated service life is 8 to 10 years.
>
> I'm leaning towards the Lasdrop Gen 2 for my installation though I'm
> tempted to keep the PYI.  The new bellows kit is 1/3 of the price of the
> new lasdrop seal.
>
> https://www.practical-sailor.com/issues/26_22/features/4431-1.html
>
> I'm also considering a new auto prop instead of paying to get my max-prop
> rebuilt.
>
> Josh
>
> On Wed, Dec 11, 2019, 10:56 AM Ken Heaton  wrote:
>
> Is yours vented?  The vent was added some years ago. With it you never
> need to burp the seal.  We don't have the vent so occasionally we do have
> to burp it.  If I ever replace it I will put the same dripless, but with
> the vent.
>
> Ken H.
>
> On Tue, 10 Dec 2019 at 13:48, Josh Muckley via CnC-List <
> cnc-list@cnc-list.com> wrote:
>
> Alright folks,
>
> I'm looking for thoughts on a replacement for my PYI dripless shaft seal.
> It has worked fine and I'm not afraid to stick with it but I'm looking for
> possible options or improvements.
>
> I've heard of Tides Marine making one and Sailor Sam's sells 4 different
> designs by the name Last Drop.
>
> I'll be pulling and truing the shaft, rebuilding the prop, replacing the
> cutlass bearing, replacing the seal.  Anything else I'm forgetting while I
> have it apart?
>
>
> Thanks,
> Josh Muckley
> S/V Sea Hawk
> 1989 C 37+
> Solomons, MD
> ___
>
> Thanks everyone for supporting this list with your contributions.  Each
> and every one is greatly appreciated.  If you want to support the list -
> use PayPal to send contribution --   https://www.paypal.me/stumurray
>
> ___
>
> Thanks everyone for supporting this list with your contributions.  Each
> and every one is greatly appreciated.  If you want to support the list -
> use PayPal to send contribution --  https://www.paypal.me/stumurray
>
> ___
>
> Thanks everyone for supporting this list with your contributions.  Each
> and every one is greatly appreciated.  If you want to support the list -
> use PayPal to send contribution --   https://www.paypal.me/stumurray
>
>
___

Thanks everyone for supporting this list with your contributions.  Each and 
every one is greatly appreciated.  If you want to support the list - use PayPal 
to send contribution --   https://www.paypal.me/stumurray

Re: Stus-List Mechanical shaft seal options

[WILLIAM WALKER via CnC-List]

Josh,
   The PYI seal also is capable of storing a spare seal on the shaft in front 
of the seal.  I have one.
Bill Walker
C & C 36
Evening Star
Pentwater, Michigan
On Wednesday, December 11, 2019 Josh Muckley via CnC-List 
 wrote:
Yep vented.
The PYI and Lasdrop seals rated the highest in a practical sailor review.  The 
lasdrop gen 2 has the ability to store a spare seal on the shaft and the rated 
service life is 8 to 10 years.
I'm leaning towards the Lasdrop Gen 2 for my installation though I'm tempted to 
keep the PYI.  The new bellows kit is 1/3 of the price of the new lasdrop seal.
https://www.practical-sailor.com/issues/26_22/features/4431-1.html

I'm also considering a new auto prop instead of paying to get my max-prop 
rebuilt.
Josh
On Wed, Dec 11, 2019, 10:56 AM Ken Heaton  wrote:

Is yours vented?  The vent was added some years ago. With it you never need to 
burp the seal.  We don't have the vent so occasionally we do have to burp it.  
If I ever replace it I will put the same dripless, but with the vent.
Ken H.
On Tue, 10 Dec 2019 at 13:48, Josh Muckley via CnC-List  
wrote:

Alright folks,
I'm looking for thoughts on a replacement for my PYI dripless shaft seal.  It 
has worked fine and I'm not afraid to stick with it but I'm looking for 
possible options or improvements.
I've heard of Tides Marine making one and Sailor Sam's sells 4 different 
designs by the name Last Drop.
I'll be pulling and truing the shaft, rebuilding the prop, replacing the 
cutlass bearing, replacing the seal.  Anything else I'm forgetting while I have 
it apart? 

Thanks, Josh Muckley S/V Sea Hawk 1989 C 37+Solomons, 
MD___

Thanks everyone for supporting this list with your contributions.  Each and 
every one is greatly appreciated.  If you want to support the list - use PayPal 
to send contribution --   https://www.paypal.me/stumurray



___

Thanks everyone for supporting this list with your contributions.  Each and 
every one is greatly appreciated.  If you want to support the list - use PayPal 
to send contribution --  https://www.paypal.me/stumurray

___

Thanks everyone for supporting this list with your contributions.  Each and 
every one is greatly appreciated.  If you want to support the list - use PayPal 
to send contribution --   https://www.paypal.me/stumurray

Re: Stus-List Mechanical shaft seal options

[Josh Muckley via CnC-List]

Yep vented.

The PYI and Lasdrop seals rated the highest in a practical sailor review.
The lasdrop gen 2 has the ability to store a spare seal on the shaft and
the rated service life is 8 to 10 years.

I'm leaning towards the Lasdrop Gen 2 for my installation though I'm
tempted to keep the PYI.  The new bellows kit is 1/3 of the price of the
new lasdrop seal.

https://www.practical-sailor.com/issues/26_22/features/4431-1.html

I'm also considering a new auto prop instead of paying to get my max-prop
rebuilt.

Josh

On Wed, Dec 11, 2019, 10:56 AM Ken Heaton  wrote:

> Is yours vented?  The vent was added some years ago. With it you never
> need to burp the seal.  We don't have the vent so occasionally we do have
> to burp it.  If I ever replace it I will put the same dripless, but with
> the vent.
>
> Ken H.
>
> On Tue, 10 Dec 2019 at 13:48, Josh Muckley via CnC-List <
> cnc-list@cnc-list.com> wrote:
>
>> Alright folks,
>>
>> I'm looking for thoughts on a replacement for my PYI dripless shaft
>> seal.  It has worked fine and I'm not afraid to stick with it but I'm
>> looking for possible options or improvements.
>>
>> I've heard of Tides Marine making one and Sailor Sam's sells 4 different
>> designs by the name Last Drop.
>>
>> I'll be pulling and truing the shaft, rebuilding the prop, replacing the
>> cutlass bearing, replacing the seal.  Anything else I'm forgetting while I
>> have it apart?
>>
>>
>> Thanks,
>> Josh Muckley
>> S/V Sea Hawk
>> 1989 C 37+
>> Solomons, MD
>> ___
>>
>> Thanks everyone for supporting this list with your contributions.  Each
>> and every one is greatly appreciated.  If you want to support the list -
>> use PayPal to send contribution --   https://www.paypal.me/stumurray
>>
>>
___

Thanks everyone for supporting this list with your contributions.  Each and 
every one is greatly appreciated.  If you want to support the list - use PayPal 
to send contribution --   https://www.paypal.me/stumurray

Re: Stus-List Mechanical shaft seal options

[Marek Dziedzic via CnC-List]

I would vote for the PIY Dripless. It works and there is nothing like a dry 
bilge. You don’t need to burp it ever (I have the vented version).

The catastrophic failure is as probable as with the normal stuffing box (the 
hose connecting the logshaft and the seal can break regardless of type (if you 
don’t inspect it often enough (every few years??).

Marek

1994 #122 ”Legato”
Ottawa, ON



From: CnC-List On Behalf Of David Knecht via CnC-List
Sent: 10 December, 2019 14:49
To: CnC discussion list CnC 
Cc: David Knecht 
Subject: Re: Stus-List Mechanical shaft seal options

I second David’s comment. I had a dripless on my first boat and stuffing box on 
current boat.  The only thing I have had to do with my stuffing box since 
repacking 5 years ago is tighten it slightly twice.  It is less effort than a 
dripless (no burping) and has much less (zero?) possibility of a catastrophic 
failure.  Dave

S/V Aries
1990 C 34+
New London, CT

[cid:image001.png@01D5AFAD.B481DBF0]


From: CnC-List 
mailto:cnc-list-boun...@cnc-list.com>> On Behalf 
Of Josh Muckley via CnC-List
Sent: Tuesday, December 10, 2019 12:47 PM
To: C List mailto:cnc-list@cnc-list.com>>
Cc: Josh Muckley mailto:muckl...@gmail.com>>
Subject: Stus-List Mechanical shaft seal options

Alright folks,

I'm looking for thoughts on a replacement for my PYI dripless shaft seal.  It 
has worked fine and I'm not afraid to stick with it but I'm looking for 
possible options or improvements.

I've heard of Tides Marine making one and Sailor Sam's sells 4 different 
designs by the name Last Drop.

I'll be pulling and truing the shaft, rebuilding the prop, replacing the 
cutlass bearing, replacing the seal.  Anything else I'm forgetting while I have 
it apart?


Thanks,
Josh Muckley
S/V Sea Hawk
1989 C 37+
Solomons, MD
___

Thanks everyone for supporting this list with your contributions.  Each and 
every one is greatly appreciated.  If you want to support the list - use PayPal 
to send contribution --   https://www.paypal.me/stumurray

___

Thanks everyone for supporting this list with your contributions.  Each and 
every one is greatly appreciated.  If you want to support the list - use PayPal 
to send contribution --   https://www.paypal.me/stumurray

Re: Stus-List Mechanical shaft seal options

[schiller via CnC-List]

I have had both stuffing boxes and dripless on both of my C's.  I just 
changed over our C 35-3 to a dripless and would not go back.  Both a 
standard stuffing box and dripless have the same basic weaknesses being 
the hose.


My last years of Engineering was in the Aerospace Hydraulics business.  
We used carbon/steel and bronze/tungsten carbide seals for our electric 
motor pumps.  These ran at much higher speeds than out propeller shafts.


I have had both vented and non-vented dripless shaft seals.  I only 
burped the seal at launch on the spring and found it easier than 
adjusting the packing nut with the stuffing box leaked.  The dripless on 
out C 35-3 is the vented variety and I have never burped it.


Neil Schiller
1983 C 35-3, #028, "Grace"
Whitehall, Michigan
WLYC

On 12/10/2019 2:48 PM, David Knecht via CnC-List wrote:
I second David’s comment. I had a dripless on my first boat and 
stuffing box on current boat.  The only thing I have had to do with my 
stuffing box since repacking 5 years ago is tighten it slightly twice. 
 It is less effort than a dripless (no burping) and has much less 
(zero?) possibility of a catastrophic failure.  Dave


S/V Aries
1990 C 34+
New London, CT


On Dec 10, 2019, at 1:39 PM, David Risch via CnC-List 
mailto:cnc-list@cnc-list.com>> wrote:


I have used a traditional stuffing box with the synthetic packing for 
years.  Stuff is incredible and dryer than I ever imagined.   Simpler 
is better…

*/David F. Risch/*
*/(401) 419-4650/*
*From:*CnC-List <mailto:cnc-list-boun...@cnc-list.com>>*On Behalf Of*Josh Muckley via 
CnC-List

*Sent:*Tuesday, December 10, 2019 12:47 PM
*To:*C List mailto:cnc-list@cnc-list.com>>
*Cc:*Josh Muckley mailto:muckl...@gmail.com>>
*Subject:*Stus-List Mechanical shaft seal options
Alright folks,
I'm looking for thoughts on a replacement for my PYI dripless shaft 
seal.  It has worked fine and I'm not afraid to stick with it but I'm 
looking for possible options or improvements.
I've heard of Tides Marine making one and Sailor Sam's sells 4 
different designs by the name Last Drop.
I'll be pulling and truing the shaft, rebuilding the prop, replacing 
the cutlass bearing, replacing the seal.  Anything else I'm 
forgetting while I have it apart?

Thanks,
Josh Muckley
S/V Sea Hawk
1989 C 37+
Solomons, MD
___

Thanks everyone for supporting this list with your contributions. 
 Each and every one is greatly appreciated.  If you want to support 
the list - use PayPal to send contribution -- 
https://www.paypal.me/stumurray



___

Thanks everyone for supporting this list with your contributions.  Each and 
every one is greatly appreciated.  If you want to support the list - use PayPal 
to send contribution --   https://www.paypal.me/stumurray



___

Thanks everyone for supporting this list with your contributions.  Each and 
every one is greatly appreciated.  If you want to support the list - use PayPal 
to send contribution --   https://www.paypal.me/stumurray

Re: Stus-List Mechanical shaft seal options

[David Knecht via CnC-List]

I second David’s comment. I had a dripless on my first boat and stuffing box on 
current boat.  The only thing I have had to do with my stuffing box since 
repacking 5 years ago is tighten it slightly twice.  It is less effort than a 
dripless (no burping) and has much less (zero?) possibility of a catastrophic 
failure.  Dave

S/V Aries
1990 C 34+
New London, CT



> On Dec 10, 2019, at 1:39 PM, David Risch via CnC-List  
> wrote:
> 
> I have used a traditional stuffing box with the synthetic packing for years.  
> Stuff is incredible and dryer than I ever imagined.   Simpler is better…
>  
> David F. Risch
> (401) 419-4650
>  
> From: CnC-List  On Behalf Of Josh Muckley via 
> CnC-List
> Sent: Tuesday, December 10, 2019 12:47 PM
> To: C List 
> Cc: Josh Muckley 
> Subject: Stus-List Mechanical shaft seal options
>  
> Alright folks,
>  
> I'm looking for thoughts on a replacement for my PYI dripless shaft seal.  It 
> has worked fine and I'm not afraid to stick with it but I'm looking for 
> possible options or improvements.
>  
> I've heard of Tides Marine making one and Sailor Sam's sells 4 different 
> designs by the name Last Drop.
>  
> I'll be pulling and truing the shaft, rebuilding the prop, replacing the 
> cutlass bearing, replacing the seal.  Anything else I'm forgetting while I 
> have it apart? 
>  
>  
> Thanks, 
> Josh Muckley 
> S/V Sea Hawk 
> 1989 C 37+
> Solomons, MD
> ___
> 
> Thanks everyone for supporting this list with your contributions.  Each and 
> every one is greatly appreciated.  If you want to support the list - use 
> PayPal to send contribution --   https://www.paypal.me/stumurray

___

Thanks everyone for supporting this list with your contributions.  Each and 
every one is greatly appreciated.  If you want to support the list - use PayPal 
to send contribution --   https://www.paypal.me/stumurray

Re: Stus-List Mechanical shaft seal options

[David Risch via CnC-List]

I have used a traditional stuffing box with the synthetic packing for years.  
Stuff is incredible and dryer than I ever imagined.   Simpler is better…

David F. Risch
(401) 419-4650

From: CnC-List  On Behalf Of Josh Muckley via 
CnC-List
Sent: Tuesday, December 10, 2019 12:47 PM
To: C List 
Cc: Josh Muckley 
Subject: Stus-List Mechanical shaft seal options

Alright folks,

I'm looking for thoughts on a replacement for my PYI dripless shaft seal.  It 
has worked fine and I'm not afraid to stick with it but I'm looking for 
possible options or improvements.

I've heard of Tides Marine making one and Sailor Sam's sells 4 different 
designs by the name Last Drop.

I'll be pulling and truing the shaft, rebuilding the prop, replacing the 
cutlass bearing, replacing the seal.  Anything else I'm forgetting while I have 
it apart?


Thanks,
Josh Muckley
S/V Sea Hawk
1989 C 37+
Solomons, MD
___

Thanks everyone for supporting this list with your contributions.  Each and 
every one is greatly appreciated.  If you want to support the list - use PayPal 
to send contribution --   https://www.paypal.me/stumurray

Stus-List Mechanical shaft seal options

[Josh Muckley via CnC-List]

Alright folks,

I'm looking for thoughts on a replacement for my PYI dripless shaft seal.
It has worked fine and I'm not afraid to stick with it but I'm looking for
possible options or improvements.

I've heard of Tides Marine making one and Sailor Sam's sells 4 different
designs by the name Last Drop.

I'll be pulling and truing the shaft, rebuilding the prop, replacing the
cutlass bearing, replacing the seal.  Anything else I'm forgetting while I
have it apart?


Thanks,
Josh Muckley
S/V Sea Hawk
1989 C 37+
Solomons, MD
___

Thanks everyone for supporting this list with your contributions.  Each and 
every one is greatly appreciated.  If you want to support the list - use PayPal 
to send contribution --   https://www.paypal.me/stumurray