Re: propfor pontoon 20 ft 35 hp force
WQelcome,if you read the stickies at the top of the page and the helps on the prop store page it will help you understand better what we asre trying to do.
Best way to select a prop is to give us the year of the motor,present prop size and the present max rpm and speed.Prop size should be near the base of the blades or possibly under the prop nut.
An induction tach like a Tinytach is reasonable and easy to install.
My guess would be a 10" pitch.You shouldn't make any changes without a tach to verify the motors rpm both before and after a prop change.
