Well Guys,

I'd looove to get my hands on a new TH .75 to turn over; er, if it was free. Anybody want to send me one? I promise I'll return it. I won't even start it up. I'll just put a 14" prop on it and see if I can turn it through compression.

I have a real hard time believing they came out of the factory so tight they couldn't be turned through compression. Someone said they were afraid they'd break something if they forced it through compression. OK, but that's an opinion, not a fact. But what the hey, if it breaks, back it goes as defective.

As far as 40 Amps battery capability goes, that's not a lot of current. A couple of hundred is more like it in order to run a heavy-duty starter on a stubborn engine. My heavy-duty starter, on a lawn tractor battery will spin a G38; it ought to spin a TH .75.

One can relieve the piston to cylinder clearance without disassembling the engine. Fox used to sell Lustrox for quick break in of some of his high performance engines, including the ABCs. Lustrox was jeweler's rouge AFAIK. I'll bet Duke laughed his arse off at the markup in that deal.

Taking all of the replies into consideration, I can see when one would preheat the head/cylinder, on an individual-engine basis. I'll never argue with a method that several people say worked for them.

Peace,

CR