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Old 04-13-2010, 03:36 PM
Gray Beard
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Default RE: Stuck Prop nut

String or thin rope is one of the old school ways. Another was filling the head/cylinder with oil/fuel and when you bring it up to TDC it holds the piston. The piston stop has been around as long as these two old methods and so far I have never seen any rod/piston or crank damage at all. When the piston is brought up to the stop you do not slam the wrench back and forth to remove the nut, it is one steady smooth turn. It doesn't even remove the carbon off the piston. String in a four stroke can get hung up in the valves, the piston stop is the best way. Easy to make or just go buy one. Jambing the crank/rod from the back plate?? That's the long way around the block.