39-21665A12 piston ring set is an OEM-spec ring kit for small-cylinder Mercury outboards (3.5–9.8 HP). It delivers the correct piston-to-cylinder wall seal, restoring compression...
39-21665A12 – Piston Ring Set – Mercury
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9.8 HP
39-21665A12 piston ring set is an OEM-spec ring kit for small-cylinder Mercury outboards (3.5–9.8 HP). It delivers the correct piston-to-cylinder wall seal, restoring compression...