Trx 3.3 re-tread shaft??

[Inflic501]

I bought an engine from an eBay seller from Rogers AR, he said it was new but today when I was putting it together I noticed that the tread on the main shaft is bad so I can't put the flywheel nut, what can I use to fix this problem??

[Nitronaught]

I'd check and see if there is any compression on that motor, open up the glow plug and shine a light in there, see any brownish coloring, or goldish coloring. An Unfired piston will have a silver coloration to it... If it looks copperish, goldish, brownish, it's been ran before...

I bet sure as all either he rebuilt it,, or just sent you a used engine, noway does a new engine have stripped threads on the crank...

Your best bet is trying to find a nut (maybe standard other than metric) that's just a tad smaller.... Last,,, you could try tapping it .5mm smaller.... But I wouldn't even go there, I'd check out the rest of that motor and if it has been ran,,, I'd be contacting the seller....

[Inflic501]

I did, he claims it was new, the inside looks new, he is going to send me a new shaft, but I was able to work the flywheel nut in, I broke the engine in today, seems its all good for now


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[1979chevy.]

Looking as there is no wear on the bearing's face I'd say it is fairly new also.
I've damaged threads before taking the nut off.

[Nitronaught]

Looking as there is no wear on the bearing's face I'd say it is fairly new also.
I've damaged threads before taking the nut off.

When buying an engine off of an Ebay deal.... I'm not trusting a bearing face.... I can't afford to and I'm not THAT trusting on Ebay deals... Takes 10 seconds to pull the glow plug and shine a light in the hole....