Replace your leaky or old, tattered Mercruiser Drain Plug and Gaskets! Drain Plug replaces 10-79953A2 for #1 / R / MR Alpha / Alpha I Gen II Upper and Lower Units. Gasket replaces 311598.
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Sierra® Mercruiser Upper Gearcase Drain Plug
Sierra® Mercruiser Upper Gearcase DrainPlug Gasket
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