1. Missed the live Ask the Expert event?
    Not to worry. Check out the archived thread of the Q&A with Ken Hutcheson, President of U.S. Lawns, and the LawnSite community in the Franchising forum .

    Dismiss Notice

Engine Backfire

Discussion in 'Lawn Mowing' started by JOEWOOD, Apr 4, 2005.


    JOEWOOD LawnSite Member
    Posts: 146


    At engine shut-down...Joe :cool2:
  2. LB Landscaping

    LB Landscaping LawnSite Bronze Member
    from Maine
    Posts: 1,309

    What kind of engine?? My Kohler does the same, try letting it cool down for a couple minutes before you shut it off. I usually let my mowers run on half or low throttle while I trim and shut them off after, usually solves the problem.
  3. tx_angler

    tx_angler LawnSite Senior Member
    Posts: 278

    Yup - just what he said ^^^^^. Let is cool down for a minute or so at an idle before you turn it off. My Kaws will do the same thing.
  4. ALarsh

    ALarsh LawnSite Silver Member
    from Midwest
    Posts: 2,412

    Because the engines are shut down by cutting the power to the spark plugs. The gas keeps on flowing into the engine and lights on fire without the ignition from the spark plugs.
  5. lawnrangeralaska

    lawnrangeralaska LawnSite Senior Member
    Posts: 436

    what is wrong about your mower back firing? does it hurt the motor or something or is it just the sound of the back fire?
  6. Grubville_Man

    Grubville_Man LawnSite Member
    Posts: 8

    My Kawasaki also does it at low idle, My dealer told me to increase the engine speed a little this will burn off the fuel more quickly at shut down. Where at low idle the fuel does'nt burn off as quickly causing it to build up and backfire. That was over a year ago and it has'nt done since.

    Good Luck:
  7. ed2hess

    ed2hess LawnSite Fanatic
    Posts: 13,192

    Simply shut the engine off at FULL throttle and no more back fire! I don't want to risk shearing off the flywheel key with the backfiring. We have shut the units down at full throttle for many years and no problem so far.
  8. jarroo's lawncare

    jarroo's lawncare LawnSite Member
    Posts: 116

    my kawasaki backfired the first couple of times i used it but it quit the more i used it
  9. traman

    traman LawnSite Senior Member
    Posts: 712

    let engine idle a minite ,then hit full choke it will stop in a second ,no air no nothing .
  10. spoolinaround

    spoolinaround LawnSite Senior Member
    Posts: 331

    thats a good way to foul out the plug(s)

Share This Page