Propeller

[lardeau67]

Hello I want to know what is the best ratio of helix I install on my Hunter 30.
Yanmar 2GM and transmission ratio 2.62

Currently I have a 15 inch with a pitch of 12 and it is too slow.

 

[Ian McGain]

you need to change your engine and not your prop.

If your complaint is speed over water, I suggest you need to change your engine, and not your prop. This is what I have on my 1979 30' Hunter, and I estimate, I gained less than one knot in the upgrade from the OEM two bladed prop.