The tines of your rototiller are driven through a belt and transmission system, so it's important to periodically check your tiller belt for wear and tear. Since the tiller belts transfer engine torque to the transmission, they can be under strain and if your tines stop moving, you may have a broken belt. Turn off the engine, disconnect the spark plug and look to see if the belt is broken or worn and slipping. If it is, you can order original manufacturer tiller belt replacements from MTD Parts. Check out our best-selling tiller belts here or use the Part Finder on the left.