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Mercury/MerCruiser Plug Assembly - 79953A04 / 79953Q04 Lower Unit Gear Lube Drain and Fill Hole Screw and Seal 79953Q04 is used with 3/8 - 16 drain/fill hole screw on all MerCruiser sterndrives, Mercury and Mariner outboards except the Verado series. This assembly is designed to seal or plug various ports, openings, or drains in the engine or drive system to prevent leaks, keep contaminants out, and ensure proper functioning of the engine and related components. Fits: Alpha One 1983-1990 (SN 622557 - 0F386995) Alpha One Gen 2 (SN 0D469859 & Above)
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🇺🇸 Ship from USA · On Agora since 2026
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