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Kohler 25HP on Exmark Lazer

Discussion in 'Lawn Mowing' started by waitebx, Jun 16, 2004.

  1. waitebx

    waitebx LawnSite Member
    Messages: 3

    I have an Exmark Lazer Z and the engine seems underpowered, the question is can anyone tell me if it would be best to rebuild this engine or replace?

    I am checking on replacement engines also a 27HP Kohler.

    Is there any other engines that someone recommends?
  2. waitebx

    waitebx LawnSite Member
    Messages: 3

    A n y o n e ? ? ? ? ? ? ? ? ?

    PMLAWN LawnSite Gold Member
    Messages: 3,534

    Does it need to be replaced? Rebuilt?? What is wrong with it other than you feel it is underpowered? If it is in good shape and you rebuild it than it still will be underpowered.
  4. TLS

    TLS LawnSite Fanatic
    Messages: 7,943

    So, I guess you HAVE a 25hp Kohler on it NOW?

    How many hours?

    Using how much oil?



    If under 2500hrs and using very little if NO oil, and no other symptoms, you don't need to do much.

    Your RPM's are probably just too low.

    Reply with answers to my ?'s
  5. waitebx

    waitebx LawnSite Member
    Messages: 3

    Yes I do have a 25hp Kohler on it now.
    1285hrs on engine.
    Oil consumption a quart every 5-6 hours of runtime.
    No excess noise except when under a heavy load such as going up an steep incline and just about completely stalls out.
    Fowls plugs out regularly.
    Only Smokes when first crancked and when idled back down after cutting grass.
    I don't know about the RPM's because there isn't a tach on the machine.
  6. Potchkins

    Potchkins LawnSite Senior Member
    Messages: 570

    go with the 27 hp kohler but when you swap and add a canester air filter if it doesn't already have one
  7. Ax Man

    Ax Man LawnSite Senior Member
    Messages: 446

    sounds due for replace/rebuild to me.
  8. TLS

    TLS LawnSite Fanatic
    Messages: 7,943

    HOLY COW!!!

    A quart every 5 hours??? :confused:

    Heck, they only hold 2 to begin with. :eek:

    You have SERIOUS engine problems.

    How do you even work with it like this?

    "Base to Mosquito Patrol,..... we have another lawn to mow. Dump in another quart and put those blades in gear."
  9. specialtylc

    specialtylc LawnSite Bronze Member
    Messages: 1,656

    I have found that most aircooled engines start losing power after about 1000 hrs. And by 2000 hrs they are down about 30%.
  10. txlawnking

    txlawnking LawnSite Bronze Member
    Messages: 1,905

    That bird is cooked dude!

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