Stus-List Diesel question (Franklin Schenk)

[Will Harney via CnC-List]

Frank, a couple more things to add to your check list for diagnosing smoke at 
cruising speed: One is poor fuel quality or gunk (water, diesel and algae) in 
your tank. Changing fuel and replacing filters is an easy way to rule this out. 
The second is a rusted exhaust mixer on Yanmar GM series engines. They clog up 
and cause back pressure especially in salt water. The back pressure causes poor 
combustion and black smoke. You can get a stainless steel replacement mixer on 
eBay.

Cheers,

Will Harney
Disco Volante
C 35-2 #351
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Re: Stus-List Diesel question

[Franklin Schenk via CnC-List]

I agree on the black smoke due to poor combustion of the diesel fuel.  However, 
I doubt that the lubrication oil would enter the combustion chamber unless the 
rings are badly worn.  With only a few hundred hours on the engine they should 
be as good as new.  I once had an oil change and the guy put in twice the 
proper amount of oil.  I went on a trip the next day and drove about 800 miles 
before I checked the oil level.  There was no damage to the engine.
Frank 

On Sunday, May 1, 2016 10:29 PM, Neil Gallagher via CnC-List 
 wrote:
 

 Tom,

One thing you might try is to  is to see what type of smoke you're 
getting.  Burning lubricating oil tends to be blue/white, which 
indicates your might have excess oil splashed up from the crankcase to 
the cylinder walls.  Some splash is normal, that's the way the rings are 
lubricated, but if the oil level is too high you could get burning.  If 
it's black smoke, it indicates poor combustion and unburned fuel, which 
can happen when a diesel is overloaded, or some other kind of fuel 
injection issue.

Neil Gallagher
Weatherly, 35-1
Glen Cove, NY


On 5/1/2016 9:59 PM, Tom Buscaglia via CnC-List wrote:
> Alera is my second C, but my first diesel.  My prior 35MK 1 had an Atomic4.
>
> I have been checking oil on my Yanmar about as often as I did on the A4, like 
> once a season.  Last summer I learned the error of my ways.  But I over 
> compensated for the low oil level and overfilled the engine.
>
> Our engine only had 489 hours and was in excellent condition.  I just changed 
> the oil today, but before that we did a sail.  I notice at at cripuising RPS 
> she was smoking pretty bad.
>
> Is this from overfilling or you you all think I did some real damage?
>
> Minor error or major disaster...
>
> Tom Buscaglia
> S/V Alera
> 1990 C 37+/40
> Vashon WA
> P 206.463.9200
>
>
>
> ___
>
> This list is supported by the generous donations of our members. If you like 
> what we do, please help us pay for our costs by donating. All Contributions 
> are greatly appreciated!
>


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Re: Stus-List Diesel question

[Neil Gallagher via CnC-List]

Tom,

One thing you might try is to  is to see what type of smoke you're 
getting.  Burning lubricating oil tends to be blue/white, which 
indicates your might have excess oil splashed up from the crankcase to 
the cylinder walls.  Some splash is normal, that's the way the rings are 
lubricated, but if the oil level is too high you could get burning.   If 
it's black smoke, it indicates poor combustion and unburned fuel, which 
can happen when a diesel is overloaded, or some other kind of fuel 
injection issue.


Neil Gallagher
Weatherly, 35-1
Glen Cove, NY


On 5/1/2016 9:59 PM, Tom Buscaglia via CnC-List wrote:

Alera is my second C, but my first diesel.  My prior 35MK 1 had an Atomic4.

I have been checking oil on my Yanmar about as often as I did on the A4, like 
once a season.  Last summer I learned the error of my ways.  But I over 
compensated for the low oil level and overfilled the engine.

Our engine only had 489 hours and was in excellent condition.  I just changed 
the oil today, but before that we did a sail.  I notice at at cripuising RPS 
she was smoking pretty bad.

Is this from overfilling or you you all think I did some real damage?

Minor error or major disaster...

Tom Buscaglia
S/V Alera
1990 C 37+/40
Vashon WA
P 206.463.9200



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Re: Stus-List Diesel question

[Franklin Schenk via CnC-List]

Only time will tell.  If it starts using a lot of oil you know that there is 
damage to the engine.  I would check the oil each time you go out to see if it 
is burning oil.  If the oil level does not change you were just burning off the 
excess oil.  BTW, how much did you over fill on the oil?
Frank 

On Sunday, May 1, 2016 8:59 PM, Tom Buscaglia via CnC-List 
 wrote:
 

 Alera is my second C, but my first diesel.  My prior 35MK 1 had an Atomic4.

I have been checking oil on my Yanmar about as often as I did on the A4, like 
once a season.  Last summer I learned the error of my ways.  But I over 
compensated for the low oil level and overfilled the engine.

Our engine only had 489 hours and was in excellent condition.  I just changed 
the oil today, but before that we did a sail.  I notice at at cripuising RPS 
she was smoking pretty bad.

Is this from overfilling or you you all think I did some real damage?  

Minor error or major disaster...

Tom Buscaglia
S/V Alera 
1990 C 37+/40
Vashon WA
P 206.463.9200



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Re: Stus-List Diesel question

[Josh Muckley via CnC-List]

Minor

I can't remember where I heard it but as I understand it mid to low is
better than full.   I guess these (Yanmar 3GM/HM) engines are more likely
to carry over oil into the combustion as the oil level goes up.

Same thing happens when you overfill cars and my lawnmower.  My lawnmower
runs fine except on certain hills it starts blowing all sorts of smoke.

I had a co-worker who was having all types of engines problems and smoke on
his classic camaro.  Dealership final found that the dipstick was too
short.  Evidently, some time in the car's history, someone changed out the
dipstick.  Kinda weird.

Josh Muckley
S/V Sea Hawk
1989 C 37+
Solomons, MD
On May 1, 2016 10:00 PM, "Tom Buscaglia via CnC-List" 
wrote:

> Alera is my second C, but my first diesel.  My prior 35MK 1 had an
> Atomic4.
>
> I have been checking oil on my Yanmar about as often as I did on the A4,
> like once a season.  Last summer I learned the error of my ways.  But I
> over compensated for the low oil level and overfilled the engine.
>
> Our engine only had 489 hours and was in excellent condition.  I just
> changed the oil today, but before that we did a sail.  I notice at at
> cripuising RPS she was smoking pretty bad.
>
> Is this from overfilling or you you all think I did some real damage?
>
> Minor error or major disaster...
>
> Tom Buscaglia
> S/V Alera
> 1990 C 37+/40
> Vashon WA
> P 206.463.9200
>
>
>
> ___
>
> This list is supported by the generous donations of our members. If you
> like what we do, please help us pay for our costs by donating. All
> Contributions are greatly appreciated!
>
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This list is supported by the generous donations of our members. If you like 
what we do, please help us pay for our costs by donating. All Contributions are 
greatly appreciated!

Stus-List Diesel question

[Tom Buscaglia via CnC-List]

Alera is my second C, but my first diesel.  My prior 35MK 1 had an Atomic4.

I have been checking oil on my Yanmar about as often as I did on the A4, like 
once a season.  Last summer I learned the error of my ways.  But I over 
compensated for the low oil level and overfilled the engine.

Our engine only had 489 hours and was in excellent condition.  I just changed 
the oil today, but before that we did a sail.  I notice at at cripuising RPS 
she was smoking pretty bad.

Is this from overfilling or you you all think I did some real damage?  

Minor error or major disaster...

Tom Buscaglia
S/V Alera 
1990 C 37+/40
Vashon WA
P 206.463.9200



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