18-3916 - Rings .015 oversize , 3 Rings Only

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Sierra Marine

18-3916 Piston Rings .015 OS Mercury 39-78811A12
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Sierra Marine Piston Rings .015in Os (4) is equivalent to parts:

Sierra Marine is the market leader for aftermarket marine engine parts. Sierra products cover every major engine brand. Sierra offers a comprehensive product line and an unsurpassed customer satisfaction warranty covering parts and labor.