677-45113-A0 Power Head Base Gasket for Yamaha Mariner 6B 8B | JLM Marine family-yamaha-c60tlru typically running from the fuel

typically running from the fuel tank to the engine

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

and 6H1-14303

If you store your engine seasonally

Remove the mounting bolt securing the old tensioner to the engine block or bracket

677-45113-A0 Power Head Base Gasket for Yamaha Mariner 6B 8B | JLM Marine family-yamaha-c60tlru typically running from the fuelPower 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