Part #28-8630, Tiller Drive Belt, 1/2 X 34-In. This drive belt (part number 28-8630) is for tillers. Drive belt 28-8630 connects the motor pulley to the drive system. Disconnect the spark plug before repair. Wear work gloves to protect your hands during the repair.... - Part #28-8630, Tiller Drive Belt, 1/2 X 34-In.