I have a Ariens self propelled lawnmower that I happend to hit a iron marker(pipe) with. When the blade hit the pipe, the lawnmower jolted and the engine stopped. I took a look and the blade still intact except for a nick on the edge. I replaced the flywheel key because it got broken when it hit the pipe. the engine turns on but it vibrates in such a way the looks like the shaft might be out of aligment. is there a way to check the aligment? and if so, can it be reset? or is the mower finished?
How are you certain it is the shaft? How did you measure the runout? What was the result?
For all the times I have hit things with lawnmowers - it is the blade / blade arm that gets bent and I have had reasonable success with straightening the blade / blade arm...
yes there is a way to straighten the crankshaft ,you will have to remove the engine from the mower, you can buy one or take it to a lawn mower repair shop if you buy one it comes with instructions