I have a Craftsman self propelled walk behind lawn mower with a Honda 5.5 hp engine with blade brake clutch (BBC). I need to replace the drive belt. In order to replace the drive belt the BBC needs to be removed. There is a center bolt through the BBC that holds the BBC to the rotating shaft. Question...How do you prevent the shaft from rotating when removing the retaining bolt. Is there a "piston lock" device on the engine to temporary seize movement? Is there another way to stop the rotation? thanks