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Go Back   SailNet Community > On Board > Gear & Maintenance > Engines > Diesel
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Diesel This is a new forum dedicated to diesel engines and their applicable accessories.


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  #11  
Old 07-09-2013
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Re: M25 what is this and where does the hose go?

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Originally Posted by Stu Jackson View Post
On our M25, we simply routed the breather hose down to a peanut butter jar, drilled a hole for the hose and then a bunch more smaller ones to vent it. Any oil drops into the jar with full atmospheric pressure all around. Simple.
that is what I was thinking of doing. Simple and I wont be dripping oil on the engine that is then burning off like now. A lot simpler than tapping a hole in the air box also.
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Re: M25 what is this and where does the hose go?

One more thing, if you guys are seeing a liquid oil discharge, not just the little tiny amount of aerosol vapor oil discharge, then you have an issue somewhere in your engine. There should be just a very small amount, barely visible, of smoke like vapor coming out of the tube, more than that is an indicator of positive pressure in the crankcase, which is, as I stated above, a problem. I recommend that you use the fuel and oil products for diesel engines that help them run cleaner, and I can highly recommend the Lucas oil treatment that goes in your engine oil. This stuff really does work, and it keeps the oil viscosity up where it should be at all operating temps, and does not make the oil thick like peanut butter when it is cold. This helps protect your valve guides and seals, rings, and cylinder walls, and your bottom end bearings, and all of those things are kind of necessary to have a good running long lasting engine.

These little engines will truly last longer than your boat if you take care of them, but if you do not, they will make good anchors if you melt them down.
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Re: M25 what is this and where does the hose go?

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Originally Posted by SSBN506 View Post
that is what I was thinking of doing. Simple and I wont be dripping oil on the engine that is then burning off like now. A lot simpler than tapping a hole in the air box also.
Are you getting a lot of oil out of the tube now?
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Re: M25 what is this and where does the hose go?

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Originally Posted by mark2gmtrans View Post
Are you getting a lot of oil out of the tube now?
I cant tell, if you look at the picture of my engine you can se that part of the engine is a bit darker then the rest. The jar option would tell me if it is leaking to much I assume.

http://vision-networking.ca/m25.jpg
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Re: M25 what is this and where does the hose go?

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Originally Posted by SSBN506 View Post
I cant tell, if you look at the picture of my engine you can se that part of the engine is a bit darker then the rest. The jar option would tell me if it is leaking to much I assume.

http://vision-networking.ca/m25.jpg
I would say you have a point there, put the jar on it, but make sure the lid has one other hole in it, to let air out so that it is not pressured up with the heat from the oil vapor. Let us know how much you actually are getting in there, my guess is that it is not much, the engine you have in the photos is not a dripping mess as far as I can tell. When you have the engine running and it leaves puddles like a puppy then you know you have a big problem, a tiny amount of oil vapor over a long period of time will discolor the paint, so you probably have no big problems.
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