red line:

[altodd1]

I am revving out at 5600rpm and only doing 41 mph.  I'm running a four blade 13x13 prop.  Any suggestions? Alf

[ktdust]

Take a look in the forum at old 'prop' posts. There is a lot of input to increase top speed or get a better hole shot.

[Capt Rick]

The engine is designed to turn to 6000 rpm. so it should  reach at least 5700 rpm at loaded W.O.T..

Capt Rick

[cdlollar]

Alf,
It really depends on what you are looking for, more hole shot or more top end speed, sadly you can't have both but you can typically find a happy medium.

I will check mine, I am 99% sure it's a 13x13 3 blade and I am very happy with it...will run around 47-48mph @ 5700rpm with a decent hole shot. I do know my prop has had some cupping work done to it. At 4000rpm the boat runs 35mph on the spot..Easy to set speedo with the tach.

I have never pushed the motor to 6K as Rick mentioned as I am happy running with it just running 45mph (just fast enough to stay I'm front of a storm rolling in)...and most of the time don't go much over 35mph to conserve fuel and to keep from having to listen to my wife complain that I am going too fast.

[tryme]

i changed my prop to the acme from the stock oj prop.  immediately had a better hole shot.  and went from 5500 rpm topped out to 6000.  never checked the MPH difference at top end but i wanted less effort getting out of the water.  big difference and so worth the acme prop.