Testing a Propulse adjustable pitch prop for 40 through 60hp outboards with a 13 spline propeller shaft. I had the motor raised a little bit to high to get the best performance out of it.
They ajust in pitch from 12 to 16p. I reckon there well worth the money for the performance they give. They can handle a fair bit of engine height before they let go. And they come in handy for when an extra mate or 2 jumps in for a fish as well, you can just drop the pitch back a bit rather than having to have an extra prop. It would take less than 10 minutes to change the pitch