We seam to have problem with dirty oil from the exhust at the waterline, on the stern. We know it is coming from the engine, any ideas as to the problem?
Tranquility
25D #43
sidenius@villagenet.com
dirty stern
Moderator: Jim Walsh
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Don Sargeant
Re: dirty stern
Karl,
Welcome to the club. When under power, the 25D squats in the water and the exhaust pipe is at or below the waterline. The soot from the diesel gets in the water and is dragged onto the transom. There's no way to avoid the soot from the engine. Raising the exhaust so it exits above the water would work, but be pretty difficult to do. My old folkboat was rigged that way and the transom was clean. A quick washing with MaryKate or somesuch will get the moustache off.
Don Sargeant
~~COQUINA~~
CD25D #189
Sooty too in Greenwich Cove
don@cliggott.com
Welcome to the club. When under power, the 25D squats in the water and the exhaust pipe is at or below the waterline. The soot from the diesel gets in the water and is dragged onto the transom. There's no way to avoid the soot from the engine. Raising the exhaust so it exits above the water would work, but be pretty difficult to do. My old folkboat was rigged that way and the transom was clean. A quick washing with MaryKate or somesuch will get the moustache off.
Don Sargeant
~~COQUINA~~
CD25D #189
Sooty too in Greenwich Cove
Karl Sidenius wrote: We seam to have problem with dirty oil from the exhust at the waterline, on the stern. We know it is coming from the engine, any ideas as to the problem?
Tranquility
25D #43
don@cliggott.com
-
K.Wood
Re: dirty stern
I keep a long-handled brush and biodegradable boat soap handy, and every time I return to the slip I lean over the taffrail and give her a quick scrubbing. Got to keep her looking spiffy.Karl Sidenius wrote: We seam to have problem with dirty oil from the exhust at the waterline, on the stern. We know it is coming from the engine, any ideas as to the problem?
Tranquility
25D #43
"Witness" CD25-D #182
kwoodlaw@arkansas.net
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Ken Cave
Re: dirty stern
Had the same problem in growing a mustache on the stern of the boat everytime we went anywhere.
Solved it by installing a hose over the exhaust flange-which extended the exhaust pipe about four inches.
Hasn't hurt the performance of the boat-keeps the stern clean as a whistle!
Ken Cave
Cape Dory 28 #227
bcave@whidbey.net
Solved it by installing a hose over the exhaust flange-which extended the exhaust pipe about four inches.
Hasn't hurt the performance of the boat-keeps the stern clean as a whistle!
Ken Cave
Cape Dory 28 #227
bcave@whidbey.net
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Peter Wallace
Re: dirty stern
Karl,Karl Sidenius wrote: We seam to have problem with dirty oil from the exhust at the waterline, on the stern. We know it is coming from the engine, any ideas as to the problem?
Tranquility
25D #43
I cannot speak to "dirty oil from the exaust" but if the problem is caused by carbon soot emitting from the exaust when starting the engine the FIX is to use a blend of 20% bio-diesel with your diesel fuel. Not only will this eliminate the black smoke and unpleasant odors, the Yanmar 1GM will run smoother with less noise. There are additional benifits (see SOYGOLD.COM). I purchased five gal.(approx. $30) three years ago and have had excellent results. Good luck!
LADY JANE CD25D #120
pjwallace@mediaone.net
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Don Sargeant
Re: dirty stern
Peter,
Did you change any of your fuel lines or other rubbery parts in the system? The bio-diesel route you suggest would save a lot of people a lot of ugly transoms.
Don Sargeant
~~COQUINA~
CD25D #189
Greenwich Cove
don@cliggott.com
Did you change any of your fuel lines or other rubbery parts in the system? The bio-diesel route you suggest would save a lot of people a lot of ugly transoms.
Don Sargeant
~~COQUINA~
CD25D #189
Greenwich Cove
Peter Wallace wrote:Karl,Karl Sidenius wrote: We seam to have problem with dirty oil from the exhust at the waterline, on the stern. We know it is coming from the engine, any ideas as to the problem?
Tranquility
25D #43
I cannot speak to "dirty oil from the exaust" but if the problem is caused by carbon soot emitting from the exaust when starting the engine the FIX is to use a blend of 20% bio-diesel with your diesel fuel. Not only will this eliminate the black smoke and unpleasant odors, the Yanmar 1GM will run smoother with less noise. There are additional benifits (see SOYGOLD.COM). I purchased five gal.(approx. $30) three years ago and have had excellent results. Good luck!
LADY JANE CD25D #120
don@cliggott.com
-
Peter Wallace
Re: dirty stern
Don,Don Sargeant wrote: Peter,
Did you change any of your fuel lines or other rubbery parts in the system? The bio-diesel route you suggest would save a lot of people a lot of ugly transoms.
Don Sargeant
~~COQUINA~
CD25D #189
Greenwich Cove
I have not noticed any degradation of the fuel feed system all though material compatibility is a concern when using high percent blends. I have had zero problems using 20/25% blends. Again, check out the spec. sheet on soygold.com.
Peter
Don Sargeant wrote:Peter Wallace wrote:Karl,Karl Sidenius wrote: We seam to have problem with dirty oil from the exhust at the waterline, on the stern. We know it is coming from the engine, any ideas as to the problem?
Tranquility
25D #43
I cannot speak to "dirty oil from the exaust" but if the problem is caused by carbon soot emitting from the exaust when starting the engine the FIX is to use a blend of 20% bio-diesel with your diesel fuel. Not only will this eliminate the black smoke and unpleasant odors, the Yanmar 1GM will run smoother with less noise. There are additional benifits (see SOYGOLD.COM). I purchased five gal.(approx. $30) three years ago and have had excellent results. Good luck!
LADY JANE CD25D #120
pjwallace@mediaone.net
-
Larry DeMers
Re: dirty stern -Good Idea Here
Ken,
Our Cd30 has the infamous moustache..a mark of the Volvos we use usually. I have done several things to limit the problem effectively. I lowered the bow of the boat to it's Designed waterline by adding 270 lbs of sand bags to the area behind the head holding tank. This worked miracles on about 1 dozen fronts (ie: Alcohol stove lighting is easier, water drains better from the boat scuppers on the toe rail etc.). We also noticed that we now get a thin moustache about maybe an inch in thickness after running hard for many hours. Formerly, we had a completely blackened lower half of the transom after say 5 hours of 2100 rpm running into some wind and waves).
Your idea of extending the exhaust outlet 4-6 inches seems like a good one to try. I would only be concerned about the increased back-pressure to the engine that this tube will make. It is probably not worth worrying about though.
To remove the black soot..and quickly too, we use a product called Starbrite! Black Streak Remover. It's a standard product in the catalogs, and works using chelation of the offending carbon.
Works real well on the transom blackening as well as those black streaks down the sides at every toe rail opening.
Cheers!
Larry DeMers
s/v DeLaMer
Cape Dory 30
demers@sgi.com
Our Cd30 has the infamous moustache..a mark of the Volvos we use usually. I have done several things to limit the problem effectively. I lowered the bow of the boat to it's Designed waterline by adding 270 lbs of sand bags to the area behind the head holding tank. This worked miracles on about 1 dozen fronts (ie: Alcohol stove lighting is easier, water drains better from the boat scuppers on the toe rail etc.). We also noticed that we now get a thin moustache about maybe an inch in thickness after running hard for many hours. Formerly, we had a completely blackened lower half of the transom after say 5 hours of 2100 rpm running into some wind and waves).
Your idea of extending the exhaust outlet 4-6 inches seems like a good one to try. I would only be concerned about the increased back-pressure to the engine that this tube will make. It is probably not worth worrying about though.
To remove the black soot..and quickly too, we use a product called Starbrite! Black Streak Remover. It's a standard product in the catalogs, and works using chelation of the offending carbon.
Works real well on the transom blackening as well as those black streaks down the sides at every toe rail opening.
Cheers!
Larry DeMers
s/v DeLaMer
Cape Dory 30
Ken Cave wrote:
Had the same problem in growing a mustache on the stern of the boat everytime we went anywhere.
Solved it by installing a hose over the exhaust flange-which extended the exhaust pipe about four inches.
Hasn't hurt the performance of the boat-keeps the stern clean as a whistle!
Ken Cave
Cape Dory 28 #227
demers@sgi.com
-
Don Sargeant
Re: dirty stern -Good Idea Here
Larry,
Following your lead (no pun intended) I put 75lbs of lead billets in my chain locker (that's all I had) and got rid of the famous 25D grass skirt, but it didn't affect the moustache. I'll try starbrite...
Don Sargeant
~~COQUINA~~
CD25D #189
No longer doing the hula in Greenwich Cove
don@cliggott.com
Following your lead (no pun intended) I put 75lbs of lead billets in my chain locker (that's all I had) and got rid of the famous 25D grass skirt, but it didn't affect the moustache. I'll try starbrite...
Don Sargeant
~~COQUINA~~
CD25D #189
No longer doing the hula in Greenwich Cove
Larry DeMers wrote: Ken,
Our Cd30 has the infamous moustache..a mark of the Volvos we use usually. I have done several things to limit the problem effectively. I lowered the bow of the boat to it's Designed waterline by adding 270 lbs of sand bags to the area behind the head holding tank. This worked miracles on about 1 dozen fronts (ie: Alcohol stove lighting is easier, water drains better from the boat scuppers on the toe rail etc.). We also noticed that we now get a thin moustache about maybe an inch in thickness after running hard for many hours. Formerly, we had a completely blackened lower half of the transom after say 5 hours of 2100 rpm running into some wind and waves).
Your idea of extending the exhaust outlet 4-6 inches seems like a good one to try. I would only be concerned about the increased back-pressure to the engine that this tube will make. It is probably not worth worrying about though.
To remove the black soot..and quickly too, we use a product called Starbrite! Black Streak Remover. It's a standard product in the catalogs, and works using chelation of the offending carbon.
Works real well on the transom blackening as well as those black streaks down the sides at every toe rail opening.
Cheers!
Larry DeMers
s/v DeLaMer
Cape Dory 30
Ken Cave wrote:
Had the same problem in growing a mustache on the stern of the boat everytime we went anywhere.
Solved it by installing a hose over the exhaust flange-which extended the exhaust pipe about four inches.
Hasn't hurt the performance of the boat-keeps the stern clean as a whistle!
Ken Cave
Cape Dory 28 #227
don@cliggott.com
-
Larry DeMers
Re: dirty stern -Good Idea Here
Starbrites Black Streak Remover is normally like $11-12/spray bottle. It's on sale now at Boat/US for $5.99, and is worth every penny! It also works well on the black streaks that drain down from our coamings and mid-ship cleat openings.
I have run into perhaps 20 people now, that have added weight to the bow of their CD's, and it has made big differences for them all. Saddly, it does not prevent the black moustache from happening, although it did lessen it on our boat. I am going to try the extended exhaust pipe trick (using a piece of hose 6-8 in. long). I don't think the increased back pressure will make much difference in engine performance, but we will see.
Cheers!
Larry DeMers
s/v DeLaMer
Cape Dory 30
demers@sgi.com
I have run into perhaps 20 people now, that have added weight to the bow of their CD's, and it has made big differences for them all. Saddly, it does not prevent the black moustache from happening, although it did lessen it on our boat. I am going to try the extended exhaust pipe trick (using a piece of hose 6-8 in. long). I don't think the increased back pressure will make much difference in engine performance, but we will see.
Cheers!
Larry DeMers
s/v DeLaMer
Cape Dory 30
Don Sargeant wrote: Larry,
Following your lead (no pun intended) I put 75lbs of lead billets in my chain locker (that's all I had) and got rid of the famous 25D grass skirt, but it didn't affect the moustache. I'll try starbrite...
Don Sargeant
~~COQUINA~~
CD25D #189
No longer doing the hula in Greenwich Cove
Larry DeMers wrote: Ken,
Our Cd30 has the infamous moustache..a mark of the Volvos we use usually. I have done several things to limit the problem effectively. I lowered the bow of the boat to it's Designed waterline by adding 270 lbs of sand bags to the area behind the head holding tank. This worked miracles on about 1 dozen fronts (ie: Alcohol stove lighting is easier, water drains better from the boat scuppers on the toe rail etc.). We also noticed that we now get a thin moustache about maybe an inch in thickness after running hard for many hours. Formerly, we had a completely blackened lower half of the transom after say 5 hours of 2100 rpm running into some wind and waves).
Your idea of extending the exhaust outlet 4-6 inches seems like a good one to try. I would only be concerned about the increased back-pressure to the engine that this tube will make. It is probably not worth worrying about though.
To remove the black soot..and quickly too, we use a product called Starbrite! Black Streak Remover. It's a standard product in the catalogs, and works using chelation of the offending carbon.
Works real well on the transom blackening as well as those black streaks down the sides at every toe rail opening.
Cheers!
Larry DeMers
s/v DeLaMer
Cape Dory 30
Ken Cave wrote:
Had the same problem in growing a mustache on the stern of the boat everytime we went anywhere.
Solved it by installing a hose over the exhaust flange-which extended the exhaust pipe about four inches.
Hasn't hurt the performance of the boat-keeps the stern clean as a whistle!
Ken Cave
Cape Dory 28 #227
demers@sgi.com