Mercury - Drain Screw Gasket Yamaha Replacement Marine Sealing Washer 8M0162524. Overview. There are some parts you never think about until the moment you need them - and when you do, you want the right one. A drain screw gasket might seem small, almost forgettable, but anyone who has ever watched a bead of gear oil creep down a skeg after a long run knows just how important it really is. The Mercury 8M0162524 Drain Screw Gasket brings the kind of quiet reliability you count on when you're maint