Hit a semi-buried stump in the new yard, now it sounds like the blade is hitting the housing. If I bent something it it fixable?

Hi,
A bent blade is fairly easily replaceable; a bent crankshaft is replaceable, but a bit more difficult.
To check crank, remove plug and tilt with plug (hole) or air filter up, depress safety bail and pull engine over. A wobble will be fairly obvious to an observer.
Peace,
Clarke