This kit converts any 3.5hp 4-Stroke Mercury outboards to 5hp. It includes the 5hp carburetor as well as an aluminium propeller to take advantage of the extra horsepower.
The propeller is actually slightly smaller than the stock 3.5hp plastic propeller, however because it doesn't flex like a plastic one it provides more overall power. If you already have an aluminium propeller, you can simply order this 5hp carburetor: Mercury 3.5 to 5hp Upgrade Carburetor
