I have one TH .75 engine that shot the front bearing twice in less than 5 gallons of fuel.

Finally replaced those bearings with aftermarket and haven't had any problems.

Never had an issue with any of the 7 other TH .75 engines I've had.

If you want to know about the TH .75, do a search. There's a TON of info on this engine. Just takes a little time to read through it all.