Backfire

Discussion in 'Lawn Mowing' started by Dingo, Mar 21, 2000.

  1. osc

    osc LawnSite Senior Member
    Posts: 502

    Actually, I had a kohlor rep tell me to idle the engine all the way down for a minute "and then" rev it to half throttle just before shutting off. My Kohlor will still backfire if I shut it off at low idle. If do ot the way the rep says, then I get no backfire. None of my Kaw's seem to backfire.
     
  2. MowerUp

    MowerUp LawnSite Member
    from NC
    Posts: 61

    I have a 25 hp Kohler that does this. My mechanic told me to push it back to half throttle and cut it off. THis works!<br>
     
  3. cantoo

    cantoo LawnSite Silver Member
    Posts: 2,910

    Kohler's manual on my 20 hp says to shut it off at 1/2 throttle... If in doubt read the manual for shut down procedures. I'm not sure on the Kawi's
     
  4. Charles

    Charles Moderator Staff Member
    Posts: 7,835

    My new 23 kohler. Backfires no matter what you do. Not everytime but most of the time. I idle it down and it still backfires. But was told this was natural.
     
  5. McLawn

    McLawn LawnSite Member
    Posts: 8

    If you shut down at 1/2 throttle you will not have a problem.
     
  6. Fishbige

    Fishbige Guest
    Posts: 0

    As soon as you turn the key off, push the throtle wide open & it won't backfire.
     
  7. Alan

    Alan Member
    Posts: 1,185

    For what it's worth, my 25 Kohler (Exmark Lazer Z) would backfire like you describe. I switched to Amsoil synthetic oil and the backfire stopped. I theorize that their claims about running cooler on synthetic oils is true and the reduced temperature makes the difference. Incidentally, the synthetic oil is getting once a season changes and is not cooking into a thick black goo in 250 hours of use. Guess it stands the heat just like they claim too.
     

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