The Sierra 18-2919 Water Pump Gasket seals the water pump to the gear housing on applicable Mercury / Mariner Outboards and Mercruiser MR / Alpha One drive applications. It replaces Mercury / Mercruiser 27-42631, 27-426311 and 27-8M0204678.
Sierra 18-2919 is a gasket designed to seal the water pump to the gear housing assembly in various Mercury and Mariner outboard motors. This gasket is compatible with a range of engine models, including:
Need help with fitment? Contact us with your engine model and serial number and we'll help check suitability.
What is Sierra 18-2919?
Sierra 18-2919 is an aftermarket water pump gasket for Mercury Outboard & Mercruiser Drive applications.
Which part numbers cross-reference Sierra 18-2919?
This listing cross-references Mercruiser 27-426311, Mercury 27-42631, Mercury 27-426311 and GLM 31050. See the Cross References & Alternative Products section above for linked alternatives where available.
How can I check whether Sierra 18-2919 fits my Mercury Outboard & Mercruiser Drive application?
Contact us with your engine model and serial number and we'll help check suitability.
Australian Dollars
