Backfiring

[John R]

Drove to the dealer this morning and told him what it was doing, he said not to let it idle for a cool down, he said when I was done mowing let it run at half to 3/4 throttle for a minute or less, then shut it off.

I came home and run it around the yard to get it hot, about 30 minutes, took it back in the shed and slowed it down to around 1/2 throttle and shut the key off, no backfire.

I guess I'm just old school on letting the any engine run at idle to stabilize the heat before shut down.

Never too old to learn.

Thanks for the help.