Engine Trouble

Discussion in 'Mechanic and Repair' started by MCS Lawn Care, Oct 10, 2005.

  1. MCS Lawn Care

    MCS Lawn Care LawnSite Member
    Messages: 46

    OK HERE YOU GO GUYS IV GOT A kolher command and the problem im having seems to be a reving issue. here is what i mean, when i put the throttle to full the engine seems to ( sound effect) go vroom vroom vroom up and down like that. what can i adjust to make this better.

    when you are done laughing at me for such a great sound effect please help a brother out

  2. lawnmaniac883

    lawnmaniac883 LawnSite Silver Member
    Messages: 2,613

    First off, you may have water in the carb, you may have bad/old fuel causing surging issues. Most likely, your governor is toast or is out of adjustment. Post your engine model #'s and restrorob will help ya out a little easier.
  3. smokey

    smokey LawnSite Member
    Messages: 27

    Check the obvious things first before making any adjustments. Fuel quality,air filter, broken governor spring would be a good place to start.
  4. Restrorob

    Restrorob LawnSite Fanatic
    Messages: 11,029

    Thanks lawnmaniac.

    Sounds like the high speed RPM's is set a little too high, First what brand unit is this ? Does this happen with the blades engaged ? You need a tachometer to properly set the RPM's. If you post the model #'s as said I'll post the proper adjustment procedure.
  5. Brianslawn

    Brianslawn LawnSite Silver Member
    Messages: 2,004

    is it a 26 efi? sounds like mine before switching to close loop operation.
  6. MCS Lawn Care

    MCS Lawn Care LawnSite Member
    Messages: 46

    ok the new engin is a kohler CV20s on a dixie xw2000 this engine was installed in augest of last year. it does happen with the blades installed, if i throttle ack this problem seems to stop.

  7. Restrorob

    Restrorob LawnSite Fanatic
    Messages: 11,029

    Still sounds like the RPM is too high, Lower it by going where your throttle cable hooks to the engine. You will see the cable hooks to a small arm, On this arm is a screw with a jam nut. Loosen the jam nut and back the screw out a little to lower, screw it in to raise it and lock the nut. This is where the tach. is needed so you can see what RPM the engine is running. The book spec. on this engine is 3600 to 3750 depending on engine serial number,At no load with the engine warm.
    Take care
  8. MCS Lawn Care

    MCS Lawn Care LawnSite Member
    Messages: 46

    fixed it thanx to all on lawnsite

  9. chipk1

    chipk1 LawnSite Senior Member
    from Florida
    Messages: 398

    Mine does the same thing. Dealer said it is due to newer emission controls. They said carb has to run lean, so surging happens under full throttle with no load on engine.
  10. Restrorob

    Restrorob LawnSite Fanatic
    Messages: 11,029

    Thats correct most will do it with no load, But if it does it while under load there is a chance it's running a little over the RPM range.

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