Water Pump Impeller Repair Kit – Fits Mercury/Mariner 15 HP Outboards (Replaces 8M0070780, 42038Q3) family-yamaha-15mlhy Close the engine's seacock to

Close the engine's seacock to prevent water from entering the exhaust system

can extend the valve's lifespan significantly

7L COMPETITION SKI 4-Stroke 1987-1995 87-91019A2 GM 350 V-8 MerCruiser 5

Tighten the mounting bolts to the manufacturer's specified torque in the correct sequence

Water Pump Impeller Repair Kit – Fits Mercury/Mariner 15 HP Outboards (Replaces 8M0070780, 42038Q3) family-yamaha-15mlhy Close the engine's seacock toWater Pump Impeller Repair Kit Fits Mercury Mariner 15 HP Outboards (Replaces 8M0070780, 42038Q3) This water pump impeller repair kit is designed for Mercury and Mariner 15 HP two stroke outboard motors. It provides all the necessary components to replace a worn or damaged impeller in the lower unit water pump assembly, restoring cooling system performance and preventing engine overheating. This kit is a direct replacement for Mercury part numbers