Yamaha Props and Rpms

[Pursuit2550]

I have a 91 Pursuit 2550 w/twin 150 Yamahas running 19 props. I took it out this weekend for the 1st time since buying it and got 48mph@5200rpms. Should I just leave it alone or go with a 17 prop. I had about 100gals of fuel me, my wife and 2 kids. I ran the boat by myself ad them with them no change. Advice.

Thanks

 

[steelespike]

Re: Yamaha Props and Rpms

I believe the 150 is rated at 5,000 rpm.Your running 5,200 with family and 100 gals of gas.Seems good to me.The 17 would improve hole shot and add 3 to 400 rpm.putting you at 5,600.Of course you could throttle back a little.
Most say a 2 stroke likes to rev but I'm conservative.
You might try fine tuning the setup by raising the motor vertically a little one hole at a time.you might gain some rpm and speed and won't cost anything.

 

[jevery]

Re: Yamaha Props and Rpms

Are we talking F150 4 Strokes or V150 2 Strokes?

 

[Pursuit2550]

Re: Yamaha Props and Rpms

93 Yamaha 150 2-stroke. I dont know much about these engines but dont mostlly all 2-strokes rev at 5500 . My 93 Johnson 225 max rpms was 5500, so I thought that the Yamahas being v6 would also rev 5500. Also my holeshot is awesome you gun it and the boat jumps out and planes fast.

Thanks

 

[jevery]

Re: Yamaha Props and Rpms

Yamaha's website shows 4500-5500 WOT for the 2 stroke 150's. Sounds like you're in the sweet spot to me.