Kohler Command 23 smokes on start-up

Discussion in 'Lawn Mowing' started by maxpac4, Oct 7, 2010.

  1. maxpac4

    maxpac4 LawnSite Member
    Posts: 3

    My Kohler Command engine smokes on start-up. It has only 215hrs on it.
    I just bought it used. The mechanic at the dealer said it had something to do with the lifters? This doesn't make sense to me, seems like it would be valve
    seals or rings? Help?

    Thanks, Phil
     
  2. lawnpro724

    lawnpro724 LawnSite Silver Member
    Posts: 2,201

    your right on track, its valve seals. Oil is leaking past the seal and into combustion chamber and burning off at startup. This is more annoying than harmful so I wouldn't worry to much about it unless its gets worse and your engine oil level starts dropping. How long was it sitting before you bought it?
     
  3. ShooterK2

    ShooterK2 LawnSite Senior Member
    Posts: 816

    Does it do it every time you start it? I had one that would do it occasionally, although I've read on here about others that do it pretty much all the time. It never did cause any trouble, or use any major amount of oil, so I just didn't worry about it.

    As far as what's causing it, I'm like you, it'd seem like valve seals to me.
     
  4. maxpac4

    maxpac4 LawnSite Member
    Posts: 3

    It wasn't sitting more than 2 weeks. Yes, I dont think I'll worry about it
    either. It has not used any oil, just annoying. No, it doesnt do it every time
    either. Thanks for the advise!
     
  5. knox gsl

    knox gsl LawnSite Platinum Member
    Posts: 4,719

    I have a new one and it does this, just the nature of the engine. I don't need to add oil between oil changes and it is only on the first start up of the day.
     
  6. soloscaperman

    soloscaperman LawnSite Gold Member
    Posts: 3,045

    It's normal. Got the same engine but he 27HP. Larger carb. Mine does it 1-3 times a week. Hasn't done it for 2 weeks so I am keeping my fingers crossed. Happen since brand new.
     
  7. MS_SURVEYOR

    MS_SURVEYOR LawnSite Bronze Member
    Posts: 1,002

    Yea! It drives me nuts. I've have the 30hp. After some research by phone to Kohler, this site, reading, and talking to other Kohler owners, it seems a Kohler needs to be shutdown at half throttle or more to keep from smoking at start up. It works, but that drives me nuts too! :dizzy:
     
  8. soloscaperman

    soloscaperman LawnSite Gold Member
    Posts: 3,045

    I thought that was for the back firing problem. My mower never once back fired she has about 350 hours. I always let it idle for 10- 30 sec before shutting down.
     
  9. ShooterK2

    ShooterK2 LawnSite Senior Member
    Posts: 816

    Is that what a Kohler rep told you? Seems strange to me........if oil is leaking past the valve seals when the engine is NOT RUNNING, then what difference does it make what RPM it was running when last shut down? I'm not saying it doesn't work.......I never tried it........but I do know that if I didn't let mine idle for a while before shutting it off, it would backfire.
     
  10. MS_SURVEYOR

    MS_SURVEYOR LawnSite Bronze Member
    Posts: 1,002

    Well that too. Seems that letting it idle 10- 30 sec or 2 minutes causes the oil pump to continue to pump oil after shutdown, trapping oil on the topside of the rings.
     

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