677-45113-A0 Power Head Base Gasket for Yamaha Mariner 6B 8B | JLM Marine family-yamaha-c60tlru but typically every 2–3 years

but typically every 2–3 years or when you experience hard starting

typically running from the fuel tank to the engine

Includes a complete water pump repair kit

but it is designed for use with the existing water pump housing (6AW-44311-01-00)

This kit is a direct replacement for Mercury OEM part numbers 8M0090558 and 8M0232733

677-45113-A0 Power Head Base Gasket for Yamaha Mariner 6B 8B | JLM Marine family-yamaha-c60tlru but typically every 2–3 yearsPower Head Base Gasket Fits Yamaha Mariner 6B 8B 2 Stroke Outboards This aftermarket powerhead base gasket is precision engineered for Yamaha Mariner 6 HP and 8 HP 2 stroke outboard models (6B, 8B). Designed specifically for units with serial numbers starting with 677, this gasket ensures a reliable seal between the powerhead and block, critical for maintaining compression and preventing oil fuel leaks. Direct replacement for OEM part numbers: 677