Keep the boat propeller clean and free from dents

Any marine growth on the blades of your propeller will reduce its efficiency, and burn more fuel. Similarly, any nicks or dents in the leading edge of each blade will cost you power. If the propeller is badly damaged, it will need to be professionally repaired, but small nicks can be filed or hammered out at home. (Make sure the engine is unable to be turned over or started if you are handling the prop)