The 18-3931 piston rings offer a reliable replacement ring set for many Johnson / Evinrude outboard engines with a standard bore (2.188"). This set helps restore proper...
18-3931 – Piston Ring Set – Johnson / Evinrude
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compression rings
39-96170A4 – Piston Ring Set – Mercury
39-96170A4 piston ring set delivers a high-quality replacement ring set designed for Mercury outboard engines. These rings restore compression, reduce blow-by, and help return...