What is correct pitch/prop for my Yamaha 4 stroke 150 HP set up?

[buzzsaw]

I was at the Grays Bay landing today and spoke with a seemingly knowledgeable guy who had a similar boat as mine and was wondering what set up I was running/top speed etc... I told him I had Crystal Pierz set it up and they picked out the prop for me. I have a 1850 Crestliner Sportfish w/Yamaha 150 HP four stroke motor.... he said I should have atleast a 23 pitch and a prop with larger blades.... he also stated something about the fact that the prop should fit evenly with it's housing and that mine had a fairly large gap and the prop looked small.... my prop is 13 1/4 x 21. What can anybody who knows something tell me???

[tomfromblaine]

some things these guys are gonna want to know is what rpm are you at when at W.O.T. and trimmed up,what is your MPH how long does it take you to plane out and are you trimmed down when you try to get on plane.. finally don't put to much stock into the guy at the boat launch, the people at the dealerships have factory recomended pitches for different motors to help you get the "all-a-round perfomance" prop but you can certainly fine tune that for your needs. and on the other hand dealerships DO make mistakes.

[Hooked On a Feeling]

Buzz...

You need to find your WOT Rpm's (Wide Open Throttle), check your max RPM's for your motor and adjust from there, if your higher on the RPM scale you can use a higher pitch prop, if your on the lower of the RPM's you need to go down in prop pitch. I assume you have an aluminum prop? You can increase hole shot, top-end & bow lift with a stainless prop. I have the same boat and went stainless, best money I've spent on the boat. What I really liked with the stainless is the bow lift it gives, seems your riding on top of waves instead of thru waves. If you go stainless, just remember that stainless will approx. run about 200 RPM's less than an aluminum at the same pitch.

P.S. My prop looks small but "buzzzes" very nice.

Hooked

[buzzsaw]

I'm planning taking it out Wednesday after work for a spin...

[walleyewizard]

Hooked... I have the same motor with stainless prop. Just wondering what your top end is and how slow can you troll?