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Crankshaft Nut Removal 1800 1970

I've done this before. One time drove my 140 about a block to the gas station with no grill and no radiator and had them use their air wrench. No longer have that option. I've also just read the "stuff-the-rope-into-the cylinder-through-the-plug-hole" method. That scares me.

My own pancake compressor probably doesn't have the oomph to do this. Is there some other way, using a big breaker bar, without having to pull the starter and jam the flywheel? I have a double pulley, so I imagine I can devise some sort of grooved holder and combine it with a pie clamp to keep things from rotating. Or maybe there's a way to do it by jogging the engine with a stout socket in place and the breaker bar against the floor ...or chained to it. But then I can't even remember if it's a RH or LH thread...or what the tightening torque might be if i do get it off. And that latter sound like a disaster looking for a place to happen.

Just getting tired of the oil all over the engine and want to replace the seal. Anyone invented this wheel before? Also, what else should I look for while I'm in there?






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