Honda Impeller - 19210-ZV4-013. Restore strong, consistent cooling water flow with the genuine Honda impeller, part number 19210-ZV4-013. The impeller is a key wear item inside the water pump, responsible for moving cooling water through the engine. Replacing it on schedule helps your Honda outboard maintain proper operating temperature and reduces overheating risk in both saltwater and freshwater use.. Key Features. Genuine Honda water pump impeller for cooling system service. Helps maintain proper cooling water flow and stable operating temperatures. Ideal for preventative maintenance and seasonal service intervals. Supports long-term reliability in harsh marine environments. OEM fit and function for compatible Honda applications. Fitment. Honda BF9.9AH. Honda BF9.9AK. Honda BF9.9AM. Honda BF15AH. Honda BF15AK. Honda BF15AM. Why It Matters. Impellers wear over time from heat, sand, silt, and normal use. A worn impeller can reduce water flow, leading to weak telltale output and overhe