Sierra International 18-2244 Marine Drain Plug
Sierra Mercruiser Upper Gearcase Drain Plug. Replace your leaky or old, tattered Mercruiser Drain Plug! Drain Plug replaces 10-79953A2 for #1 / R / MR Alpha / Alpha I Gen II Upper and Lower Units. Pick yours up now! Sierra Mercruiser Upper Gearcase Drain Plug