79/80 Mercruiser 140 181 cid stumbling

[estebany]

Steady running until I try to open up, either slowly or quickly from 3000+ RPM, then starts to stumble and quits. Starts right back up without a problem. New pump, replaced fuel lines, installed water separator, engine and carburetor rebuilt 20 hours ago. Seems to starve for fuel. Electronic ignition, spark plugs (split fires)look and are new. Thank you.

 

[Bondo]

Re: 79/80 Mercruiser 140 181 cid stumbling

Sounds like you've figured out Why... "Seems to starve for fuel" <br /><br />I'd be looking at the Carb again...<br />Could be the accellerator pump, or Float levels....

 

[akriverrat]

Re: 79/80 Mercruiser 140 181 cid stumbling

or filters and lines from tank.

 

[estebany]

Re: 79/80 Mercruiser 140 181 cid stumbling

Thanks for the quick help. I neglected to mention this only happens under load. Out of gear, she goes to 4200 RPM slow or easy without a problem. I too am leaning to carburetion problems. About how much for a rebuilt?

 

[estebany]

Re: 79/80 Mercruiser 140 181 cid stumbling

Problem found in gas tank filter. Blew line(a little resistance)and motor runs just fine. Thanks for the help. Something to add to the check list.