Keep your outboard's cooling system operating at peak efficiency with the Mercury Impeller Key 8M0173458. This replacement hardware is critical for securing the cooling-water impeller to the driveshaft, ensuring reliable water flow to prevent engine overheating. Mercury parts and accessories are engineered and tested to provide the best fit and function for your specific outboard model.
- Fits Mercury 6-15hp TwoStroke and 10hp Magnum/Marathon/SeaPro models
- Secures the cooling-water impeller for reliable operation
- Includes precision-fit impeller key and required washer
- Essential component for water pump service and maintenance
- Mercury parts ensure the best fit, function, and performance
