Kohler Command 27, wide open no loar 3700 RPM...

Discussion in 'Lawn Mowing' started by WOODSHED, Mar 27, 2009.

  1. WOODSHED

    WOODSHED LawnSite Member
    from Indiana
    Posts: 57

    Does this sound right? It is a CV740-0022 in a Simplicity Cobalt. I assume that once the blades are engaged it drops down to the 3600 sweet spot. Anybody know for sure? I called 5 dealers and got 5 different answers ranging from 2800-3850. Is 3700 gonna harm the engine? It was set at 3380-3390 previously. Thanks.

    Scott
     
  2. lawnpro724

    lawnpro724 LawnSite Silver Member
    Posts: 2,201

    Are you asking about engine rpm full throttle?
     
  3. jkilov

    jkilov LawnSite Bronze Member
    from MS
    Posts: 1,415

    Yes I think Kohlers have a 3750 rpm limit.

    However, the max. allowed rpm derives from the equipment that engine powers.
     
  4. AmsoilPower

    AmsoilPower LawnSite Senior Member
    Posts: 938


    2800? Are you serious that you were given this as an answer? You may consider staying away from that dealer for service work.

    You are right on target at 3700.
     
  5. puppypaws

    puppypaws LawnSite Fanatic
    Posts: 8,905

    Kohler's factory specs are 3750 no load on the CV 740. This is also per their engineers which I have spoken with personally on this subject.

    QUOTE FROM THEIR MANUAL:

    Engine Speed
    NOTE: Do not tamper with the governor setting to
    increase the maximum engine speed.
    Overspeed is hazardous and will void the
    engine warranty. The maximum allowable
    high idle speed for these engines is 3750 RPM,
    no load.
     
    Last edited: Mar 27, 2009
  6. I MOW ALONE

    I MOW ALONE LawnSite Bronze Member
    Posts: 1,910

    3700 is what i set mine at your dead on at 3700 no load.
     
  7. Richard Martin

    Richard Martin LawnSite Fanatic
    Posts: 14,700

    As long as it's not using a lot of oil at 3700 then it's fine.
     
  8. puppypaws

    puppypaws LawnSite Fanatic
    Posts: 8,905

    You and I know that, I actually spoke with a Kohler engineer about what we both had happen. They said, "we have no idea what would cause heavier oil consumption at our recommended rpm setting." There again, they told me 1 ounce per hour was within their tolerances of oil usage.

    My 28 efi would maybe use 8 oz's in 50 hrs, the minute I jacked it up to 3750 it was using probably close to the 1 oz or more per hr. I could not believe what was taking place, I dropped it back to 3700 and it quit what I consider excessive usage, but still uses a little more than at 3600.

    The extra 100 rpm's seems to make a great deal more difference in power of the mower than I would have believed. I would not normally think of 100 rpm's making as much difference as I actually felt in the mowers operation.

    I would still love to know how 50 rpm's can make that much difference in oil usage. I've heard many people speak of running 3750 with no problems but you and I both saw a big difference in the 28 efi's.
     

Share This Page