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Walker 20 Hp Kolher 2001

Discussion in 'Mechanic and Repair' started by wacky zachy, Apr 14, 2008.

  1. wacky zachy

    wacky zachy LawnSite Member
    from mass
    Posts: 52

    Oil in the aircleaner housing any idea what would cause this ? it seems to run fine and not miss a beat am just concerned it will be a problem soon?
     
  2. tomo

    tomo LawnSite Senior Member
    Posts: 660

    hello,
    From your description oil is sitting on top of carby [on the air cleaner base ]just enough to wet your finger ,more or less ?
    The oil is most likely coming from the breather tube which is part of the positive crank case ventalation system [ PCV ]
    Check in side the rubber tube which is located in the airfilter base .
    If there is some oil it can be as below
    1/ the pcv filter needs changing as it is degraded and can no longer control
    the oils access to the exit . parts are cheap and u will need a gasket also
    2/ The reed valve and the surface it seals against maybe worn . part is cheap and do this with no 1 .
    3/ replace the rubber hose if not already done so with the high temp version [red in colour] The hoses crack and let dust in causing potential engine failure .

    After u have done the cheap/ easy repairs there is a test u can perform .
    Place a vacumn guage over the breather port located on the pcv top cover . When engine is running a vacumn should be present . If u have pressure there it means compression is escaping into the crank case either a blown head gasket and /or the cylinder bores /rings are worn .

    tomo:waving:
     
  3. wacky zachy

    wacky zachy LawnSite Member
    from mass
    Posts: 52

    i just looked at the service manual which shows the whole top of the motor and air cleaner housing and don't see a pvc on this motor, there is one on a carb motor? if i trace back where that rubber hose goes will i find. if you can please explain

    thanks again Tomo
     
  4. 2stroke

    2stroke LawnSite Senior Member
    Posts: 260

    ine threw a bunch of oil into the aircleaner when my fuelpump was having an issue. hope this helps.
     
  5. tomo

    tomo LawnSite Senior Member
    Posts: 660

    hello,
    Do u have a black rubber hose coming of the engine thru the air filter housing base and pointing to the carby ??
    Where the hose is connected to the engine ,it is actually a cover which covers the filter and reed valve .
    PCV = positive crankcase ventalation

    [this only applies to walkers fitted with v twin kohler and the donaldson airfilter setup /remote air intake]
    [i suspect that there was a airfilter setup on very early walkers that were different ]

    tomo:waving:
     

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