Description
SIERRA Yamaha 6/8 HP Exhaust Chamber Gasket – 18-99112 is a fit-specific sealing gasket for the exhaust chamber on selected small Yamaha two-cylinder outboards.
Catalog coverage includes selected 6 HP applications from 1986-2000 and 8 HP applications from 1984-2009. Match the engine model and OE gasket number before disassembly.
Key Features
- Fits selected Yamaha 6 HP outboards
- Fits selected Yamaha 8 HP outboards
- Seals the exhaust chamber joint during reassembly
- Replaces specified Yamaha 6G1-series gasket numbers
- Suitable for exhaust-chamber service when the original gasket is disturbed
Specifications
- Manufacturer Part Number: 18-99112
- Product Type: Exhaust chamber gasket
- Application: Selected Yamaha 6 HP / 8 HP outboards
- 6 HP Coverage: Selected 1986-2000 models
- 8 HP Coverage: Selected 1984-2009 models
Interchange / Cross Reference
- Yamaha 6G1-41112-00-00
- Yamaha 6G1-41112-01-00
- Yamaha 6G1-41112-A1-00
Verify the exact engine model/year and OE gasket number before ordering.

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