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Go Back   SailNet Community > On Board > Gear & Maintenance > Fuel in oil - where to start?
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Thread: Fuel in oil - where to start? Reply to Thread
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Topic Review (Newest First)
08-07-2013 02:48 AM
Capt Len
Re: Fuel in oil - where to start?

For fear of water coming back into the manifold at rest , I installed a solenoid type valve on the bottom of the aqua lift. Gets its power thru oil pressure switch from key and closes. Dumps to bilge when no pressure. Anti siphon is necessary regardless and an RV type black water valve at the transom for those big following seas under sail.
08-06-2013 04:30 PM
Skagit
Re: Fuel in oil - where to start?

Quote:
Originally Posted by hellosailor View Post
skagit, when you question the exhaust design, is this a production boat or a backyard builder's home special?
Hard to say. Looks production, but the boat is 40 years old, so who knows what's been done to it. It's not a good setup regardless...it just defies too much of the proper exhaust theory I've read about. There's just no room before it goes uphill, and it's ALL uphill from that little 6" bend. I'm going to do a dry riser so I can get at least 12" of vertical and inject the water on the downhill side, appx. 18" before the water lift. Also going to add a new water lift, since the one in there is probably original.

Quote:
Originally Posted by aa3jy View Post
Is there an anti siphone valve set up above the exhaust loop? If so is it working?
No. No anti-siphon anywhere. That's another thing on the list. Even if that's not the problem, it's a good way to...you know...not sink, which is always the #1 goal of a sailing trip. That would go between the seacock and the water pump, right?

Quote:
Originally Posted by bratzcpa View Post
Hey there Skagit. Where are you working on your project? Located at home on the hard . . . or Somers or Dayton? It would be fun to pop by and take a look sometime.

Regards,

markb
Hey Mark! Welcome back to cold country! I'll PM you and we can set up a time to get together. I'd like to know how your trip went.
08-06-2013 03:52 PM
sony2000
Re: Fuel in oil - where to start?

"Everyone is talking at me and I don't hear a word they say" Midnight Cowboy.
Water in the oil, 90% chance it is from the float needle valve leaking. After the valve is rebuilt, all the other problems should be less, or go away.
08-06-2013 03:32 PM
bratzcpa
Re: Fuel in oil - where to start?

Hey there Skagit. Where are you working on your project? Located at home on the hard . . . or Somers or Dayton? It would be fun to pop by and take a look sometime.

Regards,

markb
08-06-2013 03:20 PM
aa3jy
Re: Fuel in oil - where to start?

Is there an anti siphone valve set up above the exhaust loop? If so is it working?
08-06-2013 03:14 PM
hellosailor
Re: Fuel in oil - where to start?

skagit, when you question the exhaust design, is this a production boat or a backyard builder's home special?
08-06-2013 03:12 PM
Skagit
Re: Fuel in oil - where to start?

In case anyone's following this...here's the latest.

Took the head and exhaust manifold off, both look sound. I'm 99% sure I'm the victim of a poorly designed exhaust system. With the exception of about 6" of downhill exhaust pipe, the entire exhaust system is above the manifold discharge. With the static level of the water in the pipe, I figure I have less than a pint of capacity before I've got water backing up into places it shouldn't be (valve seats). Given the slow starting and long cranking required (before the carb rebuild), I think I was backing water up into the engine, hence the water in the oil.

I plan to build a proper exhaust riser with an injection elbow and get to going!
07-17-2013 05:05 PM
Skagit
Re: Fuel in oil - where to start?

Quote:
Originally Posted by hellosailor View Post
Paste says no, lab says yes...OTOH I'm glad that what I remembered (milky oil is water contamination) has been upheld. OTOH...sorry to hear that. I guess that also means the paste is good for gross contamination, i.e. separate layers of water, rather than water that is mixed in nicely.
Yeah, the paste just doesn't have the sensitivity to pick up small amounts of water in emulsion. Lab results came back as 5% water. That's after 10 min of running.
07-17-2013 05:03 PM
Skagit
Re: Fuel in oil - where to start?

Quote:
Originally Posted by Mechsmith View Post
If you are raw water cooled where did antifreeze come from? If not raw water cooled you should have some evidence in the heat exchanger. Either loss of coolant or muck in it.
PO winterized with antifreeze...only so many places it can come from and all are expensive. Going to pull the engine in the next few weeks and see what we got.
07-16-2013 08:52 PM
Mechsmith
Re: Fuel in oil - where to start?

If you are raw water cooled where did antifreeze come from? If not raw water cooled you should have some evidence in the heat exchanger. Either loss of coolant or muck in it.
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