1988 O.M.C. 3.0

[j.b. travis]

I have A problem when I run the motor wide open It starts to lose mile an hour after obout 1minute also rpm. but if I back it all the way down and hit it again goes through same thing. no one thing it slowly dies down not just quite. thanx j.b.

 

[petryshyn]

Re: 1988 O.M.C. 3.0

Measure the fuel pump pressure while under load, right at the carb inlet with a tee in gauge. This will verify a fuel supply issue...(restricted filter, tank venting, anti-syphon valve, air leak, kinked hose, fuel pump etc.) Since its runs fine briefly, its sounds like the float bowl level is being lowered when under load.