Water Pump Impeller Kit – Fits Yamaha F9.9/F13.5/F15/F20 Outboard Motors (Replaces 6AH-W0078-00-00) 4-10HP This thermostat is compatible with

This thermostat is compatible with a wide array of Yamaha 4-stroke outboard engines

We strongly recommend you verify the part number or dimensions from your engine's service manual or existing part before purchasing for a 35/40 HP model

This kit is a direct replacement for Honda OEM part 19021-ZW1-003 and serves as an aftermarket cross-reference for Sierra 18-3187

The parts are functionally identical

Water Pump Impeller Kit – Fits Yamaha F9.9/F13.5/F15/F20 Outboard Motors (Replaces 6AH-W0078-00-00) 4-10HP This thermostat is compatible withProduct Details This complete Water Pump Impeller Kit provides everything needed to restore the cooling system on Yamaha 4 Stroke F9. 9, F13. 5, F15, and F20 outboard engines from 2006 to 2023. A functional impeller is critical for circulating raw water to prevent the engine from overheating, ensuring reliability and longevity. It is a direct replacement for Yamaha part numbers 6AH W0078 00 00, 6AH W0078 01 00, 6AH W0078 02 00, and Sierra interchange