25 HP Kohler Back firing

[BODA1968]

I just purchased a new riding mower with a 25 HP Kohler that back fires when I turn the machine off! Is this normal? If not, is there any quick fixes?
Thanks in advance.

Roy
Lafayette, Louisiana

[krgrn]

I had one do the same thing if I left the throttle at mid to high range. I was told you should slow the engine to the lowest throttle position before shutting down. It worked for my unit.

[Avery]

Normal. Just let it idle for awhile before you cut it off and it should stop.

[BODA1968]

Thanks for the help!

Roy

[TLS]

Let idle for about 30 seconds to a minute. Allows you to raise gate and strap machine down. Then just as you switch the ignition switch OFF, move throttle to at least 1/2.

This WILL stop the backfire.

You can also shut off at 1/2 throttle, but I don't like the "spin-down" of an engine from higher RPM.