Kohler Courage 20 knock

I was moving and heard a tone change then a knock. I shut her down and looked everything over. The oil was low but not empty. I topped it off and started it up. Now there is a knock. I parked it and pulled the motor apart. It looks like there is a counterweight attached to the crankshaft and it seems to have a bit of play.


:help: Please tell me if it is fixable or worth the effort. :help:

I don't have much experience on engines. I've rebuild a couple of 5 HP Briggs in my youth.

Thanks