I am repowering my 20 foot 1999 Monark pontoon boat with a 1989 Force 85 HP, It currently has a 1999 Force 40 hp on it both have power tilt and trim.
The new motor comes with a Michigan prop P539 13 1/4 x 17 stainless prop 3 blade. I think that this prop will probably be too much prop for this...