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Description
Sierra 18-3751 Spanner Nut for Mercury & Mercruiser Engines
For IA/IB/IC & EZ Shift, MC-I, R, MR, Alpha One, Gen II, Vazer, TRS, Bravo I & IX
Interchangeable with:
- GLM
- 21120
- Mallory
- 9-72155
- Mercruiser Stern Drive
- 79448
- 52834
- 35912
- Mercury Marine
- 8M2011027
- 79448
California Residents: 
WARNING Cancer and Reproductive Harm - P65Warnings.ca.gov
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