What size prop for my mariner?

[murphoir]

I have a 20hp mariner short shaft approx 86+ and I need to replace the prop. I have the option of between 9 to 15 inch pitches and was wondering what this meant and what one is best for me. I would like to be able to pull a kneeboard behind (and wakeboard if it goes well enough). If anyone has any suggestions then they would be most appreciated. Many thanks Murphoir...

 

[WillyBWright]

Re: What size prop for my mariner?

You're going to want a lower pitch for towing probably 11p max. I assume you're using your 12' Inflatable, will the transom tolerate towing? What prop is on it now?