Need some help, 25 Kohler Trouble

Discussion in 'Lawn Mowing' started by Keith, May 28, 2001.

  1. Keith

    Keith LawnSite Gold Member
    Messages: 3,979

    Hey guys. To those who have had a blown head gasket on a 25 Kohler, how did it act when this happened? After five lawns today mine started sputtering and backfiring and in general just running rough.

    The warranty either ends today or tomorrow :angry: I was hoping someone could give some insight on what their Kohler did when this happened.

  2. Keith

    Keith LawnSite Gold Member
    Messages: 3,979

    I messed with it a little more. It doesn't seem to be down on power (at least all that much), but it surges really bad without load. It sounds as if it picks up 500-700 RPM and then drops it right back down. Carburetion trouble?
  3. ljmey

    ljmey LawnSite Member
    from Georgia
    Messages: 16

    Keith; it sounds like a good carb. cleaning is in store for you.
    I got a 22 hp kol. and it done the same thing, I just took the
    carb. off and gave it a good cleaning. Now it runs great. Don't forget the fuel filter. Use a good quality one.
  4. TLS

    TLS LawnSite Fanatic
    Messages: 7,943

    Sounds like yours is a fuel filter or dirt in the carb. Have them check that. Also may be SMART SPARK module gone bad. Not sure how old yours is.

    When the head gaskets go, it sounds like an OLD VW Bug on a mosquito patol smoke run!
  5. Keith

    Keith LawnSite Gold Member
    Messages: 3,979

    I don't know what happened. I just went out and messed with the choke and throttle cables and it now runs fine. I think the heavy rain we got caught in caused the cables to gum up or something. For the last two days the throttle has not responded until 3/4 of the way to full. Really strange part is there are little rubber boots on the engine end of both cables (protective cover). Well, the little boot had slip off of the cable cover and slid down near the throttle linkage. I would never have thought that would cause a problem, but I put it back where it was supposed to be and the throttle works properly too.

    Thanks for your replies. It may not be fixed yet, we'll see tomorrow.

    BTW, post #1000 :D
  6. Lawn DOG

    Lawn DOG LawnSite Senior Member
    Messages: 276

    Hey Keith,

    Did you know that the day after your warranty expires the dealers have a little button they press?

  7. Volhunter

    Volhunter LawnSite Member
    from TN
    Messages: 33

    My dealer told me he will not carry a 25 Kohler. He has nothing against Kohler, and sells a lot of them, except the 25hp. He said it came back for more problems than the rest of the Kohlers put together. I know that isn't what you wanted to hear, but thought it might be food for thought for anybody reading and shopping too.
  8. Richard Martin

    Richard Martin LawnSite Fanatic
    Messages: 14,699

    Kohler has fixed the head gasket problem. Buy the 25 with confidence.
  9. Grassman

    Grassman LawnSite Member
    Messages: 203

    You couldn't give me that POS 25. Trade it in and go with a Kaw23hp. Good luck,Russ
  10. Cutter1

    Cutter1 LawnSite Bronze Member
    Messages: 1,261

    I have used both the 23 kaw and 25 kohler, I have a kaw now!! I will never go back to Kohler. The 23 Kaw runs a lot stronger than the 25 Kohler.

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