Chopper II | 20-25 HP RIGHT-HAND | Mercury Racing Propeller | 43592A61 | Discontinued

A: Hi Jeff,

A chopper II can except a prop shaft diameter of .696, 10 spline, this would be a two stroke. The hub needs to be modified to fit a 20/30 HP four stroke.

I called Mercury propellers and they indicated that the 20 - 25 four stroke's have the 14 spline prop and a smaller prop shaft, .600 diameter.

Mercury offers a Black Max Aluminum Prop. (25-30 HP 4 stroke) in the following;
10" dia. x 8P
9.75 " dia. x 9.5P
9.5" dia. x 11P
9.25 dia. x 12.5P

or a Vengence (25-30 HP 4 stroke) in the following;
9.8" dia. x 9.5P
9.5" dia. x 11P

The Vengence is not a performance prop like the chcpper.

Please let me know if I can be of further assistance.

Thanks,
Jim Merten Jr. Answer provided by:  supportbh1 (2/23/2018)