Lower Unit Oil Drain Plug – Fits Mercury/Mercruiser 40-115 HP (Replaces 10-79953Q2, 10-79953A2, 18-2244) GMC 54 mm (6" × 2"

54 mm (6" × 2" × 0

or Sierra 18-8816

The plug can remain in the engine

reconnect all linkages and fuel lines

ensure the plug is screwed in tightly

Lower Unit Oil Drain Plug – Fits Mercury/Mercruiser 40-115 HP (Replaces 10-79953Q2, 10-79953A2, 18-2244) GMC 54 mm (6" × 2"Product Details This Marine Lower Unit Oil Drain Plug is a direct fit replacement for a range of Mercury and Mercruiser outboard engines and stern drives. It is designed for 40 115 HP outboards as well as Bravo and Alpha One Gen 2 stern drive models, providing a reliable seal for your gearcase. It serves as a direct cross reference for multiple manufacturer part numbers, including Mercury 10 79953Q2, 10 79953A2, Sierra 18 2244, GLM 22420, and Mallory