Yamaha Head Gasket - 18-3804 - Sierra
Replaces OEM part #
- MERCURY MARINE 27-84733M
- MERCURY MARINE 27-19138M
- MERCURY MARINE 27-19138
- YAMAHA 689-W0001-A1-00
- YAMAHA 689-11181-02-00
For: Mercury/Mariner Model 30A; S/N Code 689
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