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Kohler breather tube ALERT!

Discussion in 'Mechanic and Repair' started by mcambrose, Mar 31, 2007.

  1. mcambrose

    mcambrose LawnSite Senior Member
    Messages: 518

    I have five Walker's with Kohler engines. WHen I went by the dealer on Thursday he said Kohler had upgraded the breather tube (tube between crankcase and carburetor) because there had been some problems with cracking. My mechanic said he had rebuilt several engines because of cracked breather tubes. He suggested I change all of mine. I checked two this morning and both had cracks, so I replaced them. I will replace the others in the next few days. I had had a couple of engines fail because of breather tube problems, so I am taking no chances. I just thought others might be interested in the information. The may be old news. if it is old news, I apologize.
  2. chipk1

    chipk1 LawnSite Senior Member
    from Florida
    Messages: 398

    25hp Kohler, if so I feel for ya. Only one of many plagues in that motor! Dumped mine and got a new KAI 28hp
  3. newz7151

    newz7151 LawnSite Silver Member
    from Tejas
    Messages: 2,419

    Improved Breather Hoses
    Recent reports of cracked or deteriorating breather hoses on
    Command, Aegis, and Courage engines have prompted a
    material change. A previous material change in 2004 has been
    found to be inadequate in some applications for long term
    New hoses with improved ozone protection have been
    developed and carry new part numbers. They also have the
    part number printed in white for easy identification. Please
    refer to the chart found on Service Bulletin 279 in Section 10
    for the cross reference to the new breather hose part numbers.
    All engines should be routinely inspected for deteriorating or
    cracking breather hoses. Replace any deteriorated or cracking
    hoses with a new breather hose. Only file a warranty claim if
    the engine is within the warranty period.

    Please see the attached file for the chart.

    Attached Files:

  4. topsites

    topsites LawnSite Fanatic
    Messages: 21,653

    Yeah, I'm going to see about installing an aftermarket breather filter and shutting off the hole on the carb end of things, I get tired of the crankcase sucking air out of my intake.
  5. ed2hess

    ed2hess LawnSite Fanatic
    Messages: 14,456

    And on the 15hp the darn breather will not stay inserted had to rig up something to hold onto the valve cover end.
  6. barnard

    barnard LawnSite Senior Member
    Messages: 618

    This is a good post. Very good info.
  7. newz7151

    newz7151 LawnSite Silver Member
    from Tejas
    Messages: 2,419

    Maybe this?

    cv breather hose.jpg
  8. mcambrose

    mcambrose LawnSite Senior Member
    Messages: 518

    I checked four of my five machines including a 20hp, 2003 model with 250 hrs. All units had cracks in the breather tubes. In fact, I just had an engine rebuilt that I received back yesterday. I was installing the engine and decided I should check the breather tube. It was terribly cracked and it was nota tight fit on the bottom. I could have ruined the enine rebuild in a short while. Thanks to my mechanic for giving me the information.
  9. DaughtryLC

    DaughtryLC LawnSite Senior Member
    Messages: 739

    Can someone take a Pic of this hose (cracked one) on the engine (25hp) so I can get a clear view of were its at? Is there two or just one. THANKS
  10. pugs

    pugs LawnSite Gold Member
    Messages: 3,025

    You have other problems if that is the case. The breather lets air out, not sucks it in. Thats what the valve is for ;)

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