I hit something in the yard and my mower isn't working properly! I do not think the shaft is bent (not vibrating) BUT it seems as if the blade has dropped it's scraping the ground. It starts with some difficulty pulling the rope but is running full throttle and I assume unsafe to use until it's been checked out and whatever I did to it is fixed. I really can't afford a new one, want this fixed it at all possible. Thanks, this is an ASAP need, the grass is TALL!