Gas smell

[Bill Sauser]

I have 255 merc cruisers and on one engine I am seeing spots of oil or gas in the water coming from exhaust and I am getting a strong smell of gas from the exhaust when I am running at 2500 rpms and above when it seem the worst. Any ideas on how to get it to run less rich on gas? Or is it another problem. I did clean the spark arresters on a recomendation that it was restricting air flow.

Thanks
New Boater

 

[fc3]

You probably need a carburetor rebuild. Odds are, it's leaking internally or the float level is too high.

 

[Bill Sauser]

I have some auto experience. Is there a kit I can get from Western Marine or on-line?

Thanks
New Boater

 

[HUMPH]

Please tell us you won't run it again until the problem is fixed?

 

[Bill Sauser]

The engine compartment does not smell of gas. There does not appear to be any leaks and the droplets in the exhuast is a very small amount the dissipaits immediately.

 

[fc3]

I ordered a kit from a Merc dealer waaaaay back when I had a boat with a carb engine. It was a standard GM Delco kit with a Mercury part number slapped on the box over the GM part number. I still have it if anyone with a late 1980s GM 350 (5.7L) needs a 4-BBL Rochester carb kit. Free to good home. Package still sealed.

Your kit might be the same as an auto kit, or might not. I have no way of telling, but it you make a mistake, boat go boom. Boom is bad.

Best regards,
Frank

 

[Bill Sauser]

Thanks Frank for the info... I will do my best to keep it from going boom. I agree boom is bad.

 

[Dick Whetstone]

I have a 1986 21 foot ski boat with a 5.0 Mercruiser. In 24 years I had to have the carb rebuilt one time. I took it to NAPA and they crossed the "tag" to a NAPA number and I bought the kit. Beware - rebuilding a four barrell quadra-jet is not a first time project.