671tib lost rpms

[captcrunch]

Boat ran great until went to go shark fishing today, couldn't get above 2000 rpm, changed fuel filters no difference. Anyone ha e any suggestions what to look for next

[racclarkson@gmail.com]

Boat ran great until went to go shark fishing today, couldn't get above 2000 rpm, changed fuel filters no difference. Anyone ha e any suggestions what to look for next

Bottom?

[captcrunch]

Bottom was done maybe 6 weeks ago boat ran great last week for offshore tuna fishing

[racclarkson@gmail.com]

Bottom was done maybe 6 weeks ago boat ran great last week for offshore tuna fishing

Depending on where you’re located, warming water temperatures and condition of paint, six weeks can be a long time. How about growth on the props? Dirty props can be 80% of the drag on my boat, for ey. I think you have to eliminate the bottom if nothing sticks out on motors.

[jim rosenthal]

Both engines or just one? Both sounds like the bottom, growth on the wheels, or a combination. One could be a fuel issue or something wrapped around a shaft, perhaps.

[Pascal]

After the filters (secondaries too?) I d check the wheels. Doesn’t take much barnacle growth to affect performance. Don’t know where you are but down here on FL 6 weeks will do it. Usually something wrapped on a prop would cause a vibration but not always

Any smoke on start up, underway? Any sheen on the water ?

Doesn’t have to be both engines. One weak engines could prevent the other from reaching full RPM