Quicksilver - 90-Degree Reservoir Fitting Gear Lube System Plastic Construction 861150T02. Overview. Any boater who runs a MerCruiser sterndrive knows how reassuring it feels when every part of the gear lube system is tight, clean, and dependable. There's a kind of quiet trust that builds over time - the trust that your drive will stay cool, lubricated, and ready for long days on the water. This 90-degree reservoir fitting is one of those small parts that carries big responsibility. You don't no