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help please, Kohler 27 hp losing power and running rough

Discussion in 'Mechanic and Repair' started by runthetableandy, Apr 8, 2011.

  1. runthetableandy

    runthetableandy LawnSite Member
    Messages: 21

    Well I got the mower back from the shop Friday afternoon. They said the carb was dirty, so they cleaned the carb and put on a new fuel filter, and this cost $87. I started mowing with it Saturday about 9:30am. It worked great until my third yard about 12:30, and it started doing the same thing it was doing last week. I was just cruising along and all of a sudden the rpms dropped and then the governor would make the rpms go up and down like in the end of the video. After a few minutes of idling up and down it smooths out. I let it sit for a few hours while I used my walk behind and tried it on another yard and it did it again after about ten minutes. So I'm taking it back to the shop Monday... anyone have any thoughts on what could be causing this?
  2. runthetableandy

    runthetableandy LawnSite Member
    Messages: 21

    Genlandscape - What is the governor plate?
  3. White Gardens

    White Gardens LawnSite Fanatic
    Messages: 6,776

    I vote for a bad coil.

    As soon as it gets hot it starts to cut out one of your cylinders.

    I had mine go bad on a single cylinder command 16. Would run for a while till hot then start spitting and sputtering. I shut off the blades and let it idle and it would idle fine. as soon as I put a load on the motor it would start acting up again.
  4. blake101

    blake101 LawnSite Senior Member
    Messages: 581

    Any updates on this? I sure would like to know what is was.
  5. runthetableandy

    runthetableandy LawnSite Member
    Messages: 21

    I'm picking it up from the shop Friday, I'll keep this updated until its back running right.
  6. blake101

    blake101 LawnSite Senior Member
    Messages: 581

    We are waiting....
  7. runthetableandy

    runthetableandy LawnSite Member
    Messages: 21

    Ok so I picked the mower up Friday. They said they did the same thing to it they did the first time, clean out the carb, and they didn't charge me anything this time! They said if it happens again that they will have to replace the carb. The only other thing different this time is I put some Cheveron Techtron fuel system cleaner in the fuel before I took it to them. I mowed 11 hours yesterday and not a single problem from the mower!!!
  8. blake101

    blake101 LawnSite Senior Member
    Messages: 581

    If it acts up again let us know.
  9. stoneycat20

    stoneycat20 LawnSite Member
    Messages: 2

    Glad you got it fixed..I have this same motor/mower....Mine is not charging the battery...(battery is new).will mow fine till the batter runs down..Then i have to charge it .Could it be the regulator?
    Last edited: Apr 17, 2012
  10. tonyjag@comcast.net

    tonyjag@comcast.net LawnSite Member
    Messages: 1

    I have a Ferris IS2000Z ZTR, ~2008 vintage with about 240 hours on the engine. Recently when almost done mowing our best acre, I looked at the fuel gauges and saw that the left tank was empty. As I reached (apparently too late) for the fuel tank selector, it quit running and would crank but not start. When this happened in the past, it took a lot of cranking to get started, so I carry a can of ether. After it started, it would only run at near wide-open throttle, would surge at part throttle with no load, and stall at the idle position. I tried many of the suggestions in this forum, to no avail. Finally, I tried 2 things at once, either of which worked: A. tightening the carb mounting bolts (Really weren't too loose) or B: removed the top steel passage cover atop the Nikki one-barrel carb and shot gumout spray to clear out the idle/low speed passages. I think:) #2 did the job...it runs fine now. I hope this story helps someone else.:)

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