Sierra Washers For Mercury/Mercruiser I/O, Part #18-4270-9
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• Chrysler/Force/US Marine: 12-36001
• Mallory: 9-78138
• Mercruiser Stern Drive: 12-36001
• Mercury Marine: 12-36001
- Replacement part perfectly matches OEM design
- Manufactured with marine-grade materials
- Reliable construction resists corrosion
- For Mercury/Mercruiser I/O engines