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what do i need to know about the 27hp kohler

Discussion in 'Mechanic and Repair' started by grass disaster, Feb 27, 2008.

  1. grass disaster

    grass disaster LawnSite Silver Member
    Messages: 2,755

    i just bought a new everride warrior with the 54" deck and a 27hp kohler. machine has .2 hours on it. i have yet to start it. it's still in the crate.

    can someone tell me some basics about this motor. i've had a 18hp kubota diesel before this and never had to worry about anything motor related.

    things such as.........

    how long should i let it warm up?
    what throttle position should i start?
    what throttle position shoud i shut off motor?
    do i need to let it idol before shut off?
    do i need to get valves adjusted often?
    ----i'm sure i'm missing some questions.

    please fill me in on some basics...... kohler 101 if will :confused:
  2. Stillwater

    Stillwater LawnSite Platinum Member
    Messages: 4,889

    confirm their is oil in the motor before you start it
  3. lifetree

    lifetree LawnSite Fanatic
    Messages: 5,369

    Answers --

    Warm up ... about 1 minute.
    Start position ... choke.
    Shut off position ... full throttle.
    Idle before shut off ... no.
    Adjust valves ... no.
  4. Albery's Lawn & Tractor

    Albery's Lawn & Tractor LawnSite Bronze Member
    Messages: 1,674

    Are you searious. NEVER SHUT A MOTOR DOWN AT FULL THROTTLE!!!:hammerhead:
    Always let it idle down before shutting it off as well.

    This should be common sense. The 27 Kohler is a great motor, has proven durability, good power, and it's not to bad on gas either. Good luck.
  5. GravelyNut

    GravelyNut LawnSite Bronze Member
    Messages: 1,594

    Two worst things for an engine:
    1.) Wide open on startup
    2.) Shutdown from WOT.
  6. sawman65

    sawman65 LawnSite Senior Member
    Messages: 754

    Read Your Manual!!!!
  7. Lawdog302

    Lawdog302 LawnSite Member
    Messages: 197

    There is nothing wrong with shutting this engine down at full throttle. It is recommended to shut down at half to full throttle to eliminate backfiring. Sounds like some people do need to read manuals.

    The fuel shut off solenoid on the on the carb kills all fuel entering the engine. The engine needs the high speed momentum to blow all remaining fuel out the exhaust so there is nothing left to ignite. Also since the oil pump is driven by the crank, it is constantly being supplied with oil with the key on or off.
  8. JimQ

    JimQ LawnSite Bronze Member
    Messages: 1,139

    I guess I agree with not starting the engine at WOT but what is the logic behind not shutting it down at WOT? Some of you guys seem emphatic about it. What am I missing here? Why shouldn't you shut it down at WOT?

  9. Albery's Lawn & Tractor

    Albery's Lawn & Tractor LawnSite Bronze Member
    Messages: 1,674

    What is the logic behind shutting it down at wide open throttle? Do you shut your car off at 3500 rpms? No so why would you do it to a mower?
  10. JimQ

    JimQ LawnSite Bronze Member
    Messages: 1,139

    Here's the logic... I think :)

    On a small engine without a fuel shut-off solenoid, if you were to shut is down (kill the ignition), it would continue to pull fuel from the carb and load the cylinder(s) and muffler with fuel. This might load up the plug(s) and/or result in a BOOM as the muffler explodes the next time you fire it up.

    With a fuel shut-off solenoid, when the ignition is killed, so is the fuel flow from the main jet in the carb.

    I think the real answer to this question is this:

    On a 27hp Kohler (with fuel shut-off solenoid) don't worry about what RPM you shut it down at. A good rule of thumb for small engines..... Don't shut them down at WOT


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