Winco 16200-003 Maintenance Kit GX 610/620/670 WC5000H. Your generator requires regular maintenance. Our Winco Maintenance Kit 16200-003 GX 610/620/670 WC5000H 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 cycles buy one or several and keep your Winco Generator running throughout the season. Our maintenance kits use certified winco OEM components that are backed up by the Winco name. Simple to purchase delivered complete right to your door step.