Moisture from breather

[hellrazor3114]

First of all hello everyone Im new here.
Ok just recently I purchased my first boat its a 1988 Beretta Supersport 191c,
with the chevy 305. the first day out it ran fine, but on the second day it would run out fine then periodically die out, threwout the rpm range. So I took it home figuring a carb or fuel problem. I changed the oil and the fuel seperator, took her out again and she still acted up I took the cover off and noticed that there is moisture coming from the crank case breather into the aircleaner stalling the engine. After removing the breather lines from the filter it ran out great. What could be causing this moisture.

 

[chiefalen]

Re: Moisture from breather

No water in the oil?

 

[Mkos1980]

Re: Moisture from breather

I dont have that problem, but I do know that with temps here in the low 40's at night and going out boating the next day I get alot of condensation during the first half hour. mM oil looks good I know my breather is milky and valve covers but by days end all is burned off and clean.

 

[hellrazor3114]

Re: Moisture from breather

ok when I drained the oil there was no water in it just the faint smell of fuel, I did also install a 160deg thermostat because there wasnt one in it, and my temp still doesnt get off the peg. The aircleaner is a small metal one that doesnt look that helpfull, Is there a way that I can put say a standard air cleaner on it and just put the valve cover vents on like some of the older cars got.

 

[JustJason]

Re: Moisture from breather

its probably not moisture. Its just a little crankcase smoke.

The air cleaner is a us coast guard approve flame arrestor. Its designed to keep your boat from blowing up so don't mess with it or change it to some automotive setup.
That being said they do get clogged up over time. If you take yours off and look through the fins you should be able to see daylight, if you don't yours is clogged, and could be part of the reason you have a running problem.
You can clean them out with some degreaser and the garden hose.

 

[hellrazor3114]

Re: Moisture from breather

thanks for the advice on how not to blow my self up . I am used to the usual problems with automotive and not boats, I do know that it is moisture because when you remove the air cleaner and look on the inside of it where the vent lines come it there is a considerable amout of milky colored bubbles, and when I remove the vent lines from the cleaner it runs good.

 

[chiefalen]

Re: Moisture from breather

Fuel in the oil.

Bad seat on the float pin in the carb, float not floating no more?

Fuel pump leaking fuel into the oil?

 

[JustJason]

Re: Moisture from breather

if you have milky oil in the breather tubes then you should (or will eventually) be getting water in the oil.
I'd have a look at the intake manifold gaskets. a slight leak will drip water down into the valley. and It will quickly evaporate, but still eventually put water in the oil.
Pulling those tubes off shouldn't really effect the way the engine runs. You can fart down the carb all day long and it won't change anything.
Did you have a look at your arrestor yet?

 

[chiefalen]

Re: Moisture from breather

You wouldn't see a milky oil if it were fuel in it. But you would smell it.

Could be 2 different problems.