First full day with new Lazer

Discussion in 'Lawn Mowing' started by Lawn-Scapes, May 24, 2001.

  1. Lawn-Scapes

    Lawn-Scapes LawnSite Silver Member
    Posts: 2,810

    So far so I'm pretty pleased.

    I have a couple of questions though...

    It's a 25hp Kohler and it backfires just about every time I shut it down. I read the Kawis do this alot. Is this unusual for Kohler? Is it just a break in thing that will get better?

    The hydrolics seem to me to be pretty noisy... forwards, backwards...always hear 'em working. Much more pronounced than my previous Gravely ZTR. Normal?

    Last job of the day my customer comes out so I drive over and shut the machine off. Chit-chat a bit... show off the new machine. I go to start up the mower... Nothing! Just a very faint click. Ask the customer for a hammer, tap on the starter and it started... thank God!
    What's up with that? Break in thing again?
  2. 65hoss

    65hoss LawnSite Fanatic
    Posts: 6,360

    Don't know about the kohlers. The ones I have don't backfire much, but they have many hours on them by now.

    Yep, the hydros are noisy. You don't really notice them at full power, but lower rpms you can really hear them scream.

    Sounds like a starter problem. I would probably call the dealer and see if they have a new one in stock, and have them replace it.
  3. joshua

    joshua LawnSite Bronze Member
    Posts: 1,226

    let the machine cool down for a minute before shuting it down, thats why its making the noise afte you turn the key off. i can still hear the hydrolics working on mine after 400 hours, just normal to me, it makes me feel better though because i know their working. not sure on the last one of why it wouldn't start.
  4. Lawn-Scapes

    Lawn-Scapes LawnSite Silver Member
    Posts: 2,810

    That's the thing... they're pretty loud even at full power. On the Gravely I had to lower the throttle to hear them. I'll have to see if I can find someone else with one to compare.....

  5. David Gretzmier

    David Gretzmier LawnSite Gold Member
    Posts: 3,645

    my kohler backfired for a while when it was new, after 100 hours or so it mysteriously stopped. after 950 hours, mysteriously stopped alltogether. rebuild. dave g
  6. Cutter1

    Cutter1 LawnSite Bronze Member
    Posts: 1,251

    The hydro's get quieter after you put some hours on it. My dealer always said to make sure you turn the mower off with atleast half throttle or it will back fire. Not sure if this helps you, but maybe it will
  7. John DiMartino

    John DiMartino LawnSite Silver Member
    Posts: 2,555

    The kohler 25 always backfires,if its a command pro,shut it off at wide open throttle,if its a command,let it idle for 30 seconds,and it should shut down quietly.The starter not engaging-Id demand a new one,its already getting corrosion,and dirty contacts inside.The hydros,cant help you with,check out another one if you can.
  8. Skolnick's Landscaping

    Skolnick's Landscaping LawnSite Member
    Posts: 19

    I have the toro z-master with the 25 koler and 118 hours on it and it has never once not back fired i was told by a few people that you have to put it to half throttle then shut it off. i tried that and it still back fired i found that putting it to low idle gives it a quiter back fire and with the starter problem sounds like a bad cellenoid.
  9. Mowman

    Mowman LawnSite Senior Member
    Posts: 553

    I have a 20HP Kolher Command on my Walker. It has 750 hr's on it and if I don't let it idle for a few minutes it ALWAYS will backfire. I've learned to let it idle and cool down a bit and it WILL NOT backfire. Try it and see if it solves your problem. 2-3 minutes should be enough time. Hope this help your engine problem. As far as the hydro's I will admit I have no CLUE, as Walker Mowers are a whole different design compared to other ZTR's.
    Good Luck,
  10. eggy

    eggy LawnSite Senior Member
    Posts: 947

    I have a 25 hp kohler also, the key to mine at least is to let it cool down, we load the mower bring it down to idle , close the gate ...then shut the mower down its kinda like cooling down your body after a nice run....same idea... :cool:

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