kohler 20 hp knocks on start-up/ shut down

[jar2188]

2011 troy built bronco knocks when first started and as you shut it off, otherwise runs fine!! mows an acre just fine! any ideas?? thanks, joe!

 

[geelee]

check the engine mounting bolts, they are probably loose.

 

[jar2188]

check the engine mounting bolts, they are probably loose.

thanks! will give them a check!! joe!