propeller on a mercury 150hp optimax

[civicsi1279]

I recently purchased this boat with an optimax on it. it has a 4 bade prop but want to go to the traditional 3 blade but cant find the proper prop that should go on. I was looking on craigslist and found a 14.25x24p stainless steel. does anyone know if this is ok with my engine. if not does anyone know the proper size for this engine.

 

[Barnacle_Bill]

What are your WOT RPMs with the 4 blade prop? Why do you want to go with a 3? Most people go from a 3 to a 4 for a better hole shot.

 

[civicsi1279]

im only at 4600 rpm with the 4 blade

 

[Barnacle_Bill]

You need to go down in pitch. Figure 200 RPM per 1" change to get you to your recommended RPMs at WOT.