The Mercury Marine Drain Screw Gasket 19183K02 by Wakeboss is an essential maintenance component for your marine engine. This versatile gasket is specifically designed for use with 3/8-16 drain/fill screws found on gearcases and drives across all MerCruiser engines and most Mercury/Mariner outboards. Each package includes a set of 4 gaskets, providing excellent value for routine maintenance needs. Note that these gaskets are not compatible with Verado engines or Japanese-origin Mercury/Mariner outboards. Keep your vessel's maintenance up to date with these reliable replacement gaskets, ensuring proper sealing during oil changes and fluid maintenance procedures. Perfect for boat owners and marine mechanics who demand quality components for their marine engine maintenance.