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Notes Johnson 10 HP 10 2-Stroke 1968–1979 307949
The plug can remain in the engine
Locate the existing oil pressure sensor on the engine block
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 Notes Johnson 10 HP 10Product 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
