prop size

[markrose]

I have a 150hp johnson 1991 on a 19ft robala what a good size prop?

 

[ob]

Re: prop size

The one that will allow your engine to attain its max wide open throttle rpms with an average load aboard.I'm guessing that a 15X17 would be a good place to start.Only a water test can confirm final prop selection.Insure that the engine height set-up is optimal.This will reduce drag and exhaust back pressure.Lower unit anti-ventilation plate at or just above the "mean" bottom of hull surface.

 

[mjbf15]

Re: prop size

I hope I'm not overstepping my bounds here, but try http://www.michiganwheel.com/MIWheel/propit/main.htm <br />It seems like for your boat they suggest 14-1/4x19 to 14-1/4x21

 

[JB]

Re: prop size

Going to prop forum

 

[markrose]

Re: prop size

thanks for the info, sorry about posting in the wrong section, i really think this forum will help in the future.