ORIGINAL: ShoestringRacer

yeah you've got some rust on that crankshaft. That is really no big deal but if there is rust at the crankpin and it makes the conrod not move smooth it is a problem. And your bearings have to be free spinning. With the cooling head off does the crank spin nice and free? It looks like the engine could be a little gummed up if it has been sitting long it may not spin free nice and smooth. it isnt uncommon for a crank to have some rust on it but if your bearing are rusted it is a problem.

It's funny just tonight I completely disassembled an old O.S. .15 Hyper engine that was sitting for 6+ years - it was gummed up badly and covered with sand from running on the beach. (I have pics and vid that I didnt load yet) If your T-15 were mine I would completely disassemble it and clean it up good as new but if you don't know how to do that (you really need a torch to get the bearings out, etc.) you can still clean it up by taking the carb off and spraying some automotive carb cleaner in there, the head and back, that will get the gunk out of the bearings but ideally you want them removed to clean them, but you can still spray it and let it sit then blast it with compressed air and/or automotive brake cleaner, then oil it up with after run oil (auto transmission fluid) I've taken bearings out that were nearly frozen with gunk and let them sit in some carb cleaner and returned them to good as new service. Of course you could just try to fire it up and see what you can get out of it too.

I think that T-15 is a threaded shaft engine and if you were to switch to the G3.0 that is a pilot shaft engine so you need to convert with some parts. (maybe there is also a threaded crank G3.0 I'm not sure) If you have the car I linked below it has 12 tooth CB and they use a needle bearing which is a different set-up than the new MT2's which use 2 regular style bearings in the clutch bell, the bearings are not interchangeable.

It looks like this is the car you have:

http://www.hpiracing.com/kitinfo/10401/