I have two motors I’m tinkering with and I pulled down both lower units and found the 35 has much lower gearing than the 25.

The 35 is a 76 model and the 25 is an 84.

I want to use the 35 power head and what I’m wondering is which lower units gearing to use for the best top end speed.

Would the lower gearing of the 35 lower unit coupled with a larger more efficient prop be the way to go, or would the higher geared 25hp lower units gears with the smaller higher pitched prop be best.

This motor will be used on a 14’ aluminum semi vee.