25 HP Kohler Back firing

Discussion in 'Mechanic and Repair' started by BODA1968, Jul 6, 2004.

  1. BODA1968

    BODA1968 LawnSite Member
    Posts: 2

    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.

    Lafayette, Louisiana
  2. krgrn

    krgrn LawnSite Member
    Posts: 10

    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.
  3. Avery

    Avery LawnSite Bronze Member
    Posts: 1,389

    Normal. Just let it idle for awhile before you cut it off and it should stop.
  4. BODA1968

    BODA1968 LawnSite Member
    Posts: 2

    Thanks for the help!

  5. TLS

    TLS LawnSite Fanatic
    Posts: 7,937

    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.

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