Water Pump Impeller Kit – Fits Yamaha F75-F100 (Replaces 61A-W0078-A3-00, 61A-W0078-A2-00, 61A-W0078-A4-00) Onan as well as a range

as well as a range of D3 series diesel engines

This action will slowly and evenly draw the impeller out of the housing

Start the engine at idle and confirm a steady stream of water from the tell-tale outlet

Unbolt and remove the old

Sierra 18-3258

Water Pump Impeller Kit – Fits Yamaha F75-F100 (Replaces 61A-W0078-A3-00, 61A-W0078-A2-00, 61A-W0078-A4-00) Onan as well as a rangeProduct Details This aftermarket Water Pump Impeller Kit is engineered for Yamaha F75, F80, F90, and F100 4 stroke outboard engines manufactured between 1999 and 2013. It provides a reliable, direct fit solution for maintaining your engine's cooling system and preventing overheating. This kit serves as a direct cross reference for Yamaha part numbers 61A W0078 A3 00, 61A W0078 A2 00, and 61A W0078 A4 00, as well as aftermarket equivalents like Sierra