Looking for Better Propeller for my 1970 85HP

[smoke14]

I want to upgrade my prop to better top end prop for my 1970 85HP V4 motor. Any suggestions, currently the motor is attached to a 15' Campion Bass Boat it makes about 28mph and I would like to get in the 40mph range. The current prop is a stock aluminum prop.

 

[12vMan]

Re: Looking for Better Propeller for my 1970 85HP

To really be able to help you, a few things must be known - Is your prop stainless and in good shape, balanced etc? Is the motor sound & tight? what pitch/ diameter are you currently running?
You can increase your top end by increasing the pitch and being careful not to over-pitch. If all is good, it sounds like you may be running around a 15 pitch right now.