BoatBanter.com - View Single Post

RGrew176

Quote:

Originally Posted by

Last time I took the boat out 2 weeks ago it ran like a champ. Today
it wouldnt run over 1800 rpms. Talking about a 1990 merc 5.7 260hp -
alpha one drive. The boat starts and idles great. In throttle only it
revs as high as I dare but put it in gear and 1800 max. I think the
ditributor is good with good timing and no wires crossed. The throttle
body has full movement and peering down the carb looked like it was
wide open. The boat wasnt used much last year and of course sat all
winter. Just wondering what you would look at first?

I could get much higher rpms in reverse but probably due to the prop
taking less of a bite of water.

Any body had something similar??

Thanks

Joel

In addition to all the other great suggestions I would also pull out the fuel line pick up. I had a similar problem on an earlier boat. In my case it would get up to 2100 RPM then die or lose RPM's. In my case it was some fiberglass fibers that were in the fuel tank. They had been picked up by the screen on the end of my fuel line. It was clogged just enough to allow anything below 2000 RPM but no more. The mechanic cleared the fibers from the screen and never again was there a fuel pick up problem.