Re: Stus-List Universal / Westerbeke Sherwood raw water pump upgrade

[Dennis C. via CnC-List]

Swapped the Sherwood out with the Orberdorfer. Only had to cut about 1/8 inch 
of the barb off the inlet elbow. Straightforward job. 

Time to go sailing. 

Dennis C.
Touché 35-1 #83
Mandeville, LA

Sent from my iPhone

> On Apr 4, 2018, at 6:58 AM, Dennis C.  wrote:
> 
> Probably but since Oberdorfer offers the 837 model with shortened barbs, I 
> think cutting one of the barbs will work fine.  Plan to install it this 
> afternoon.  Will report back.
> 
> Dennis C.
> Touche' 35-1 #83
> Mandeville, LA
> 
>> On Tue, Apr 3, 2018 at 11:16 PM, Russ & Melody via CnC-List 
>>  wrote:
>> Hi Dennis,
>> 
>> Is there room to put a nipple extender on one the elbows so it can swing 
>> above the companion?
>> 
>> (apologies to anyone who gets hit by their nanny software)
>> 
>> Cheers, Russ
>> Sweet 35 mk-1
>> 
>> 
>> At 11:20 AM 3/29/2018, you wrote:
>>> I'm still researching the correct pump.  
>>> 
>>> I've pretty much determined the issue with the Oberdorfer is the spacing 
>>> between inlet and outlet when one tries to re-use the elbows from the 
>>> Sherwood.  There isn't enough clearance for the second elbow to swing past 
>>> the first elbow.  I think installing one of the elbows then cutting a bit 
>>> off the barb on the second elbow is the solution.  The Oberdorfer 
>>> N202M-837 is simply an Oberdorfer N202M-908 with two short barb elbows and 
>>> about $70 added to the price.
>>> 
>>> The online pricing for the 908 varies significantly.  Lowest so far is 
>>> $326.
>>> 
>>> Dennis C.
>>> Touche' 35-1 #83
>>> Mandeville, LA
>> 
>>  Virus-free. www.avg.com
>> 
>> ___
>> 
>> 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 Universal / Westerbeke Sherwood raw water pump upgrade

[Dennis C. via CnC-List]

Probably but since Oberdorfer offers the 837 model with shortened barbs, I
think cutting one of the barbs will work fine.  Plan to install it this
afternoon.  Will report back.

Dennis C.
Touche' 35-1 #83
Mandeville, LA

On Tue, Apr 3, 2018 at 11:16 PM, Russ & Melody via CnC-List <
cnc-list@cnc-list.com> wrote:

> Hi Dennis,
>
> Is there room to put a nipple extender on one the elbows so it can swing
> above the companion?
>
> (apologies to anyone who gets hit by their nanny software)
>
> Cheers, Russ
> *Sweet *35 mk-1
>
>
> At 11:20 AM 3/29/2018, you wrote:
>
> I'm still researching the correct pump. Â
>
> I've pretty much determined the issue with the Oberdorfer is the spacing
> between inlet and outlet when one tries to re-use the elbows from the
> Sherwood.  There isn't enough clearance for the second elbow to swing past
> the first elbow.  I think installing one of the elbows then cutting a bit
> off the barb on the second elbow is the solution.  The Oberdorfer
> N202M-837 is simply an Oberdorfer N202M-908 with two short barb elbows and
> about $70 added to the price.
>
> The online pricing for the 908 varies significantly.  Lowest so far is
> $326.
>
> Dennis C.
> Touche' 35-1 #83
> Mandeville, LA
>
>
>
> 
>  Virus-free.
> www.avg.com
> 
> <#m_8696428075897178811_DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>
>
> ___
>
> 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 Universal / Westerbeke Sherwood raw water pump upgrade

[Russ & Melody via CnC-List]

Hi Dennis,

Is there room to put a nipple extender on one the
elbows so it can swing above the companion?

(apologies to anyone who gets hit by their nanny software)

Cheers, Russ
Sweet 35 mk-1


At 11:20 AM 3/29/2018, you wrote:

I'm still researching the correct pump. Â

I've pretty much determined the issue with the
Oberdorfer is the spacing between inlet and
outlet when one tries to re-use the elbows from
the Sherwood.  There isn't enough clearance for
the second elbow to swing past the first
elbow.  I think installing one of the elbows
then cutting a bit off the barb on the second
elbow is the solution.  The Oberdorfer
N202M-837 is simply an Oberdorfer N202M-908
with two short barb elbows and about $70 added to the price.

The online pricing for the 908 varies significantly.  Lowest so far is $326.

Dennis C.
Touche' 35-1 #83
Mandeville, LA



---
This email has been checked for viruses by AVG.
http://www.avg.com
___

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 Universal / Westerbeke Sherwood raw water pump upgrade

[Dennis C. via CnC-List]

I'm still researching the correct pump.

I've pretty much determined the issue with the Oberdorfer is the spacing
between inlet and outlet when one tries to re-use the elbows from the
Sherwood.  There isn't enough clearance for the second elbow to swing past
the first elbow.  I think installing one of the elbows then cutting a bit
off the barb on the second elbow is the solution.  The Oberdorfer N202M-837
is simply an Oberdorfer N202M-908 with two short barb elbows and about $70
added to the price.

The online pricing for the 908 varies significantly.  Lowest so far is $326.

Dennis C.
Touche' 35-1 #83
Mandeville, LA

On Thu, Mar 29, 2018 at 1:04 PM, Matthew L. Wolford via CnC-List <
cnc-list@cnc-list.com> wrote:

> I’ll need to see what I have, but I believe the pump on my Westerbeke 40
> is the brass plate version you described.  A significant problem with my
> pump is inadequate suction.  We have looked repeatedly to see if impeller
> pieces were sucked into the system (found a couple).  The suction is so
> weak that I need to do the funnel-from-on-high routine to get the system
> working after spring launch.  I also sometimes need to do the funnel
> routine after being heeled over and bouncing around in bad weather.  I
> would welcome a more powerful pump.
>
> *From:* Dennis C. via CnC-List <cnc-list@cnc-list.com>
> *Sent:* Thursday, March 29, 2018 1:01 PM
> *To:* CnClist <CnC-List@cnc-list.com>
> *Cc:* Dennis C. <capt...@gmail.com>
> *Subject:* Stus-List Universal / Westerbeke Sherwood raw water pump
> upgrade
>
> For those of us who have Universal or Westerbeke diesels that use the
> Sherwood G908 clamp mount raw water pump, here's some news.  (The
> Westerbeke number is sometimes 42175.)
>
> Changing the impeller on the Sherwood is a bit of a pain because the bolts
> come in from behind.  You can either remove the pump by removing the two
> clamps, or remove the pump case by removing the 3 bolts and lifting the
> case off.  Then you have to make sure the o-ring is properly seated upon
> reassembly.
>
> Another issue with the Sherwood is that it often leaks.  Unlike many pumps
> that have a shaft seal, the Sherwood impeller seals against a brass wear
> plate on the back of the pump.  If the wear plate, which is fairly thin,
> bows outward or has excessive wear, the pump will leak raw water.  In a
> salt water environment, this tends to have a deleterious effect on the
> engine front.
>
> I replaced the thin wear plate on my Sherwood with a thicker stainless
> wear plate that I found on eBay.  That helped reduce a nagging leak.
>
> Although I don't need it yet, I found a drop in replacement, Oberdorfer
> N202M-908.  This pump is a more traditional design with shaft seals.
> Access to the impeller is from the front by removing the cover plate.
>
> The Oberdorfer N202M pump has been around for many years and is a standard
> marine engine raw water pump.  A version is used on the good old Atomic 4. It
> fits many marine diesels by being available in several models.  The
> differences are in the mounts for attaching it to the engine.  Some
> resourceful boat owners have modified Oberdorfer N202M-16's to fit the
> clamp mount configuration.  Oberdorfer now offers the clamp mount as the
> 908 model.
>
> I found one thread on a Catalina owners site which questioned the pumping
> capacity of the Oberdorfer on an M-35 engine.  I was not able to find the
> capacities of the two pumps but found many posts from boatowners who were
> using the Oberdorfer N202 series pumps on various Westerbekes and
> Universals successfully.
>
> The other good news is the Oberdorfer is a fraction of the cost of the
> Sherwood.
>
> I'm considering replacing the Sherwood with the Oberdorfer even though the
> Sherwood is doing fineright now.
>
> Dennis C.
> Touche' 35-1 #83
> Mandeville, LA
>
> --
> ___
>
> 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 Universal / Westerbeke Sherwood raw water pump upgrade

[Matthew L. Wolford via CnC-List]

I’ll need to see what I have, but I believe the pump on my Westerbeke 40 is the 
brass plate version you described.  A significant problem with my pump is 
inadequate suction.  We have looked repeatedly to see if impeller pieces were 
sucked into the system (found a couple).  The suction is so weak that I need to 
do the funnel-from-on-high routine to get the system working after spring 
launch.  I also sometimes need to do the funnel routine after being heeled over 
and bouncing around in bad weather.  I would welcome a more powerful pump. 

From: Dennis C. via CnC-List 
Sent: Thursday, March 29, 2018 1:01 PM
To: CnClist 
Cc: Dennis C. 
Subject: Stus-List Universal / Westerbeke Sherwood raw water pump upgrade

For those of us who have Universal or Westerbeke diesels that use the Sherwood 
G908 clamp mount raw water pump, here's some news.  (The Westerbeke number is 
sometimes 42175.) 

Changing the impeller on the Sherwood is a bit of a pain because the bolts come 
in from behind.  You can either remove the pump by removing the two clamps, or 
remove the pump case by removing the 3 bolts and lifting the case off.  Then 
you have to make sure the o-ring is properly seated upon reassembly.

Another issue with the Sherwood is that it often leaks.  Unlike many pumps that 
have a shaft seal, the Sherwood impeller seals against a brass wear plate on 
the back of the pump.  If the wear plate, which is fairly thin, bows outward or 
has excessive wear, the pump will leak raw water.  In a salt water environment, 
this tends to have a deleterious effect on the engine front.

I replaced the thin wear plate on my Sherwood with a thicker stainless wear 
plate that I found on eBay.  That helped reduce a nagging leak.


Although I don't need it yet, I found a drop in replacement, Oberdorfer 
N202M-908.  This pump is a more traditional design with shaft seals.  Access to 
the impeller is from the front by removing the cover plate.

The Oberdorfer N202M pump has been around for many years and is a standard 
marine engine raw water pump.  A version is used on the good old Atomic 4. It 
fits many marine diesels by being available in several models.  The differences 
are in the mounts for attaching it to the engine.  Some resourceful boat owners 
have modified Oberdorfer N202M-16's to fit the clamp mount configuration.  
Oberdorfer now offers the clamp mount as the 908 model.


I found one thread on a Catalina owners site which questioned the pumping 
capacity of the Oberdorfer on an M-35 engine.  I was not able to find the 
capacities of the two pumps but found many posts from boatowners who were using 
the Oberdorfer N202 series pumps on various Westerbekes and Universals 
successfully.

The other good news is the Oberdorfer is a fraction of the cost of the Sherwood.

I'm considering replacing the Sherwood with the Oberdorfer even though the 
Sherwood is doing fineright now.

Dennis C.
Touche' 35-1 #83
Mandeville, LA



___

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 Universal / Westerbeke Sherwood raw water pump upgrade - revised

[Dennis C. via CnC-List]

In getting a quote on the N202M-908 from Depco Pump, the reply said there
was a fitment issue with the N202M-908 with regard to the 90 degree barb
fittings.  They suggested the N202M-837 instead.

I'm thinking different barb fittings may solve that.  I think the issue is
the inlet and outlet are closer together with the Oberdorfer.  See this
thread:

http://c34.org/bbs/index.php?topic=8519.0

Also note that it looks like this owner replaced the original wear plate in
the Sherwood.  Note the tab sticking out of the gray pump.



Dennis C.

On Thu, Mar 29, 2018 at 12:01 PM, Dennis C. via CnC-List <
cnc-list@cnc-list.com> wrote:

> For those of us who have Universal or Westerbeke diesels that use the
> Sherwood G908 clamp mount raw water pump, here's some news.  (The
> Westerbeke number is sometimes 42175.)
>
> Changing the impeller on the Sherwood is a bit of a pain because the bolts
> come in from behind.  You can either remove the pump by removing the two
> clamps, or remove the pump case by removing the 3 bolts and lifting the
> case off.  Then you have to make sure the o-ring is properly seated upon
> reassembly.
>
> Another issue with the Sherwood is that it often leaks.  Unlike many pumps
> that have a shaft seal, the Sherwood impeller seals against a brass wear
> plate on the back of the pump.  If the wear plate, which is fairly thin,
> bows outward or has excessive wear, the pump will leak raw water.  In a
> salt water environment, this tends to have a deleterious effect on the
> engine front.
>
> I replaced the thin wear plate on my Sherwood with a thicker stainless
> wear plate that I found on eBay.  That helped reduce a nagging leak.
>
> Although I don't need it yet, I found a drop in replacement, Oberdorfer
> N202M-908.  This pump is a more traditional design with shaft seals.
> Access to the impeller is from the front by removing the cover plate.
>
> The Oberdorfer N202M pump has been around for many years and is a standard
> marine engine raw water pump.  A version is used on the good old Atomic 4.  It
> fits many marine diesels by being available in several models.  The
> differences are in the mounts for attaching it to the engine.  Some
> resourceful boat owners have modified Oberdorfer N202M-16's to fit the
> clamp mount configuration.  Oberdorfer now offers the clamp mount as the
> 908 model.
>
> I found one thread on a Catalina owners site which questioned the pumping
> capacity of the Oberdorfer on an M-35 engine.  I was not able to find the
> capacities of the two pumps but found many posts from boatowners who were
> using the Oberdorfer N202 series pumps on various Westerbekes and
> Universals successfully.
>
> The other good news is the Oberdorfer is a fraction of the cost of the
> Sherwood.
>
> I'm considering replacing the Sherwood with the Oberdorfer even though the
> Sherwood is doing fineright now.
>
> Dennis C.
> Touche' 35-1 #83
> Mandeville, LA
>
> ___
>
> 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 Universal / Westerbeke Sherwood raw water pump upgrade

[Dennis C. via CnC-List]

For those of us who have Universal or Westerbeke diesels that use the
Sherwood G908 clamp mount raw water pump, here's some news.  (The
Westerbeke number is sometimes 42175.)

Changing the impeller on the Sherwood is a bit of a pain because the bolts
come in from behind.  You can either remove the pump by removing the two
clamps, or remove the pump case by removing the 3 bolts and lifting the
case off.  Then you have to make sure the o-ring is properly seated upon
reassembly.

Another issue with the Sherwood is that it often leaks.  Unlike many pumps
that have a shaft seal, the Sherwood impeller seals against a brass wear
plate on the back of the pump.  If the wear plate, which is fairly thin,
bows outward or has excessive wear, the pump will leak raw water.  In a
salt water environment, this tends to have a deleterious effect on the
engine front.

I replaced the thin wear plate on my Sherwood with a thicker stainless wear
plate that I found on eBay.  That helped reduce a nagging leak.

Although I don't need it yet, I found a drop in replacement, Oberdorfer
N202M-908.  This pump is a more traditional design with shaft seals.
Access to the impeller is from the front by removing the cover plate.

The Oberdorfer N202M pump has been around for many years and is a standard
marine engine raw water pump.  A version is used on the good old Atomic 4.  It
fits many marine diesels by being available in several models.  The
differences are in the mounts for attaching it to the engine.  Some
resourceful boat owners have modified Oberdorfer N202M-16's to fit the
clamp mount configuration.  Oberdorfer now offers the clamp mount as the
908 model.

I found one thread on a Catalina owners site which questioned the pumping
capacity of the Oberdorfer on an M-35 engine.  I was not able to find the
capacities of the two pumps but found many posts from boatowners who were
using the Oberdorfer N202 series pumps on various Westerbekes and
Universals successfully.

The other good news is the Oberdorfer is a fraction of the cost of the
Sherwood.

I'm considering replacing the Sherwood with the Oberdorfer even though the
Sherwood is doing fineright now.

Dennis C.
Touche' 35-1 #83
Mandeville, LA
___

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