Sierra 18-2945 Drain Plug Gasket

The Sierra 18-2945 gear housing drain screw gasket is engineered to seal 3/8-16 drain and fill screws on Mercury Marine lower units and seawater pumps. Constructed from composite fiber material for resistance to petroleum-based lubricants and marine environments. Direct replacement for Mercury Marine OEM part numbers 12-19183 and 12-20260, and OMC Johnson Evinrude 307552. Sold as a pair. Compatible with all MerCruiser sterndrives and most Mercury Mariner outboard engines ranging from 6 to 250 horsepower. Ensures leak-free sealing during gear oil changes and routine maintenance.