no power

[carsflame]

hi everyone today had boat on water first good run this year 3 hours twin 4.3 low hours i could not get engines over 3000 rpm, fuel is good, motors tuned, motors run very good i bought boat from repo center when got boat one propeller was bent i rebuilt it, i measured the props same size one turns clockwise .one turns counter clockwise boat was very hard to get to plane i think the prop pitch is right help if can thx dave

[mmwjr]

Dave what outdrives do you have? Alpha, Bravo I, II, III?

Does the engines hit 3000 rpm before you run out of throttle?
Right now I am thinking either wrong prop pitch or wrong drive gear ratio. Do you know the prop dia and pitch, should be stamped on them? Drive ratio?

[carsflame]

good morning all i no right now is the prop is 7 inch across boat still in water drives are bravo i think 2 not 3 3000 rpm is all it has i am going back there on weekend i take boat out of water get numbers off prop

[mmwjr]

If only 7 inches they are not BII's as it swings around a 18" prop. The issue would be with the wrong pitch.

Post some picture of the drives if you can or engine cal that showing S/Ns

[carsflame]

ya prop is 22p 173/4 can only get 3000 rpm out of both engines

[mmwjr]

Dave your other post said 21 not 22 and since you listed that number first without saying (p) I took it as the diameter as this is the normal way prop sizes are listed, dia, pitch.

Seem like you need to drop the pitch from 22 to 17 but let's see what other with the same set up say