5.7 OMC breaks up after 1/2 hr

[caplbi]

I have a 1992 Chris Craft crowne with a 5.7 cobra and king cobra drive.Last week after about 1/2 hr at 4000rpms the engine started to loose power then it would regain power.Once at the dock I noticed what looked like fuel comming out of the exhaust on the water.The engine has a 4bbl Holley carb.Any suggestions?

 

[Don S]

Re: 5.7 OMC breaks up after 1/2 hr

Could be a carb problem (float sticking) could also be a fuel pump problem. See If there is a clear hose from the fuel pump that puts fuel from a leaking diaphram in the fuel pump into the carb. If there is fuel in that hose, then the fuel pump could be causing the flooding problem.