Winco 16200-005 Maintenance Kit GX 630/690 Gasoline Units. Your generator requires regular maintenance. The Winco Maintenance Kit 16200-005 GX 630/690 gasoline units provides all of the necessary products to ensure your generator is ready when you need it most. Every kit includes a NAPA Air Filter, a Bosch Spark Plug (some kits include 2), NAPA 10W-30 Motor Oil, and a Mechanic’s Cloth. Oil filter and Sta-Bil included certain kits. Use this maintenance kit for regular scheduled maintenance...