Outboard reference

PropSlip

Gear Ratios

Browse real outboard gear-ratio reference data by manufacturer, year, horsepower, and model, then return to the PropSlip calculator with the ratio you need.

Manufacturers

Evinrude 26 years, 710 models Force 5 years, 46 models Honda 32 years, 590 models Johnson 13 years, 375 models Mariner 30 years, 1,079 models Mercury 32 years, 1,770 models Nissan 20 years, 633 models Suzuki 32 years, 831 models Tohatsu 32 years, 1,184 models Yamaha 32 years, 3,731 models