Recently changed my 24' Walkaround from a Volvo Penta 1.6 single prop to a DuoProp. I changed just the lower to a DP 1.78 Gear Ratio. The specs are as follows....
Stock Numbers:
Single Prop SX 1.6-
WOT---4500 RPMs 36MPH.
14.5 x 19p SS Prop
The Boat was always a disaster with Top speed and...