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This Belt Tensioner Pulley is designed for a range of MerCruiser inboard and stern drive engines
Install the new impeller by sliding it onto the driveshaft
Remove the mounting bolts securing the old pump to the engine bracket
The parts are functionally identical
This kit is a direct replacement for Honda OEM part 19021-ZW1-003 and serves as an aftermarket cross-reference for Sierra 18-3187
Water Pump Impeller Kit – Fits Yamaha F9.9/F13.5/F15/F20 Outboard Motors (Replaces 6AH-W0078-00-00) 4-10HP This Belt Tensioner Pulley isProduct 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
