Water Pump Impeller Repair Kit – Fits Mercury/Mariner 15 HP Outboards (Replaces 8M0070780, 42038Q3) 310HP 5 to 20 HP

5 to 20 HP

visible cracks on the impeller blades

ensure the steering lock isn't engaged and try gently wiggling the steering wheel or tiller while turning the key

ensuring it is seated correctly and all seals are in place

Water Pump Impeller Repair Kit – Fits Mercury/Mariner 15 HP Outboards (Replaces 8M0070780, 42038Q3) 310HP 5 to 20 HPProduct Details This Water Pump Impeller Repair Kit is engineered for Mercury and Mariner 15 HP two stroke outboard motors. It includes all the essential components to service the lower unit water pump assembly, addressing a worn or damaged impeller to restore engine cooling performance. This kit is a direct replacement for Mercury part numbers 8M0070780, 42038T3, and Quicksilver aftermarket number 42038Q3. Installation Location: Lower unit gearcase.