What Pitch Should I Use?

[ctz71]

I recently bought a 1996 Procraft V-150B with a 90 hp mercury (I bought the boat used). The boat tops out at 42 mph, on GPS, with a 21 pitch prop. It is a little sluggish out of the hole, but i feel like it should be a little faster than it is. Does anyone have any suggestions as to why I'm only running 42 mph, or any prop suggestions?

 

[Barnacle_Bill]

Re: What Pitch Should I Use?

What RPM are you running at WOT?

 

[Silvertip]

Re: What Pitch Should I Use?

IF the engine is running at 5500 RPM at wide open throttle, then your speed is spot on (41.8 mph according to the prop calculator) and assuming about a 12% slip. A vented prop would help hole shot and not affect top end. Making sure the engine is tuned properly is also a necessity before looking at props. If the engine isn/t making full power a different prop simply masks the problem. Make sure the trottles are opening all the way as well.