10-79953Q04 Oil Drain Plug Kit 3/8-16 for Mercury Mariner MerCruiser Outboard Marine Outdrive Lower Unit GearCase Lube Drain and Fill Hole Screw and Seal Sierra 18-2244 79953Q2 79953A2
It is used on 3/8 - 16 oil drain plug and fill hole on all Mercruiser stern drives, Mercury and Mariner outboards except the verado series.
The part number is replaced by 10-79953Q2, 10-79953A2, 18-2244, 10-79953Q04.
It is made of high quality material with rubber coated stainless steel that fits for all of Mercury, Mariner outboards and MerCruiser stern drives with 3/8-16 gearcase drain/fill screw holes, prevent gear oil leaking.
The package included 2 pack oil drain plug and seal gasket.
Change oil seal gasket every time you change your gearcase oil. It's designed to “crush” under torque so it's a one time use washer. Replacement gaskets for the Mercury's lower unit drain and vent plugs.