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Gravely 260Z bogging down.

Discussion in 'Mechanic and Repair' started by klowe224, Aug 20, 2009.

  1. klowe224

    klowe224 LawnSite Member
    from KY
    Messages: 7

    I have a Gravely 260Z with a 25 HP Kawasaki. The problem is when the mower is running without blades engaged runs great. After engaging blades and putting it under a load it bogs terribly to the point of shutting off. It doen't miss or spit and sputter just loses power. I have exhausted everything from replacing all filters, cleaning carb.,changing all belts, hoses in both tanks, adjusting valves.
  2. Two Seasons

    Two Seasons LawnSite Senior Member
    Messages: 791

    Sounds like it's running on one (1) cylinder. Pull both plugs and see what you have.

    Any oil issues?
  3. Craig3

    Craig3 LawnSite Member
    Messages: 151

    read about a similar issue w/ a exmark powered by kaw.- turned out to be a bad solenoid
  4. big_belly4ever

    big_belly4ever LawnSite Member
    Messages: 66

    check high end jet in carb unscrew low and high and see if anything is blocking high end jet my gas filter fell apart and a little piece I mean a little piece blocked the high end jet so when i engaged deck it would run high and lose power and go high once it got gas again. I had no Kawasaki dealer here, but i went to the johndeer dealer here some johndeers run Kawasaki motors.Guys helped me out just buy listening to my motor when i would ideal it down it ran fine when i gave it more gas she would run good then i say moan, then run fine they said check high end jet. told i have no clue whats in the carb or to take off they told take four screws of carb bring it to them in shop. I watched him unscrew them little jets and looked at them and couldn't believe that little piece would take out my mower. 10min time had it running fine again.
  5. klowe224

    klowe224 LawnSite Member
    from KY
    Messages: 7

    I pulled plug wires while engine was running and both cause it to run rough so I think that both cylinders are firing.

    Checked compression with a tester niether one had any problem holding pressure but one held 40 FT/LBS and the other held 60. This seems weird to me and do not understand.

    I am going to check the solenoid this afternoon.

    Thanks guys this keeps me looking for new ideas.
  6. Restrorob

    Restrorob LawnSite Fanatic
    Messages: 11,029

    Looks like you need to re-check the valves, Perform a cylinder leak-down test to check both valve seats and rings. That engine should have over 100 lbs compression. It will never run right on 60/40.....
  7. klowe224

    klowe224 LawnSite Member
    from KY
    Messages: 7

    Found out the one of my mowers removed baffle from underneath deck. Will this cause not to discharge grass fast enough when I get in heavy grass in turn bogging down mower. I thought all a baffle does is create vacume hope I am wrong.

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