Kawi blowing main seal out

Discussion in 'Mechanic and Repair' started by Floridalandcare, Nov 28, 2011.

  1. dutch1

    dutch1 LawnSite Silver Member
    from Jayhawk
    Posts: 2,231

    You're right on the money, Slapper. For me the last serious case of what you describe was a 19 Kaw on a Dane Surfer--90 hours on the unit. The blower housing was packed up to the level of ignition coils with clippings/debris. Upper seal, breather cover and one head gasket leaking. The two back cap screws in the breather cover(under the flywheel) could be turned out with fingers. As a bonus, the exhaust valve on the blown head gasket side was stuck open.

    BTW, Slapper, that turkey gravy won't work on buttermilk biscuits, for me anyway.
     
  2. piston slapper

    piston slapper LawnSite Platinum Member
    Posts: 4,240

    With the grass growing season winding down, the easy gravee
    Responses are getting few and far between.

    I know turkey gravy could never replace Jimmy Deans on a biscuit,
    But it aint bad. I smoked 3 15 lb birds for 7 hours and they were some
    Of the moistest smoked turkeys Ive ever seen. I took all the drippings
    Including the giblets and turned them into gravy.
    Over 80 people and nothing but praise. Though it does get to be like work.
    Posted via Mobile Device
     
  3. Floridalandcare

    Floridalandcare LawnSite Senior Member
    from Tampa
    Posts: 314

    Its not the breather cover,granted its dirty but the oil"s not coming from there . The top of the main seal has a pool of new oil on it ( fresh oil ) and its draining down the sides of the block...
     
  4. piston slapper

    piston slapper LawnSite Platinum Member
    Posts: 4,240

    Its either scratches on the crank tearing up the new seal or a bad top bushing.
    Posted via Mobile Device
     
  5. BigFish

    BigFish LawnSite Gold Member
    Posts: 3,039

    Actually, the top bushing is replaceable. Do a search on this site,( top bushing) it appears quite do-able. I thought I remembered someone posting about it a while back.
    Also, if the crank seal area is badly scored, you should be able to find a Speedi-Sleeve to fix it. If not too bad, just clean it up with some crocus cloth
     
  6. StihlMechanic

    StihlMechanic LawnSite Bronze Member
    Posts: 1,133

    blown head gasket, crankcase filling with compressed air
     
  7. Floridalandcare

    Floridalandcare LawnSite Senior Member
    from Tampa
    Posts: 314

    Stihl, you nailed it .
     
  8. piston slapper

    piston slapper LawnSite Platinum Member
    Posts: 4,240

    If you had that much crankcase pressure, it would be blowing oil from the pto and the gov seals also.
    Some pics and oil usage history could have been helpful.
    I'd tear it down and fix everything.
    Posted via Mobile Device
     

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