i had a bit of a nose in crash. i took my engine apart to clean and inspect it. now i tried to put a new prop on. when i tightened it down the prop would not move. it seemed to tighten too close to the crank case now. i have also noticed that there is lateral movement of the crankshaft. that is it moves fore and aft about 1/32" maybe. is this movement normal? i never noticed it doing that before. it is an evolution .40 engine. not the nt version but the one that came with the trainer.