Sierra 18-3966 Mercury Piston Rings
Sierra high-quality piston rings for Mercury Marine engines. Sierra engine parts are backed by Sierra's unmatched manufacturer's warranty.
Interchangeable with:
California Residents: 
WARNING
Cancer and Reproductive Harm -
P65Warnings.ca.gov
Sierra 18-3918 Mercury Marine Piston Rings Sierra high-quality engine parts are designed to meet OEM specifications. Bore Size: 2.875 / Standard For 2 ring pistons Interchangeable...
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Sierra 18-3905 Johnson/Evinrude Piston Rings Sierra high-quality engine parts are designed to meet OEM specifications. Bore Size: 3.530 Interchangeable...
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Sierra 18-3922 Piston Rings Sierra high-quality engine parts are designed to meet OEM specifications. Bore Size: 3.125 / .015 Interchangeable with: GLM 14250 Mercury...
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Sierra 18-3982 Standard Piston Rings For Mercury Outboards Sierra high-quality engine parts are designed to meet OEM specifications. 18-3982 Piston Rings are for Mercury and Mariner Crossflow and...
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Sierra 18-3915 Johnson/Evinrude Piston Rings Sierra high-quality engine parts are designed to meet OEM specifications. For use on Johnson/Evinrude Outboards. Bore Size: 3.217 / ...
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Sierra 18-3998 Piston Rings Sierra high-quality engine parts are designed to meet OEM specifications. Interchangeable with: Chrysler/Force/US Marine 39-820457A2
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Sierra 18-3978 Mercury Piston Rings Sierra high-quality engine parts are designed to meet OEM specifications. Interchangeable with: Mercury Marine 39-15322M
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