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Remove the old gasket and thoroughly clean any residue from both mating surfaces
Mercury/MerCruiser Applications: Compatible with most V6 and V8 gasoline engines from 1992 to present
as well as OMC Cobra stern drives produced between 1986 and 1993 (excluding cone clutch models)
Other signs include a weak water stream from the tell-tale outlet
Lower Unit Drain Plug Kit – Fits Mercury/MerCruiser (Replaces 8M0058389, 79953Q04) 90-175HP Remove the old gasket andProduct Details This Sea Sierra Lower Unit Drain Plug Kit is designed for Mercury and MerCruiser lower units that utilize a 3 8 16 threaded drain fill screw. It is broadly compatible with most Mercury & Mariner outboard models, excluding the Verado series, and fits a wide range of MerCruiser sterndrives, including MC 1, Alpha One (Gen I & II), TR, and TRS models. The kit serves as a direct interchange for several part numbers, including Mercury
