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Hmmm Can you figure this out??

Discussion in 'Mechanic and Repair' started by Lordtimothy, Nov 18, 2011.

  1. Lordtimothy

    Lordtimothy LawnSite Member
    Posts: 171

    One of the threads here made me think of something that happened a couple of years ago. It really caused a bunch of head scratching for everyone......so can you figure out what the problem was??

    The situation.
    4 Different mowers (type does not matter as it is a engine problem)
    First mower had a 26hp Briggs ELS engine 225 hours
    Second mower had a 26hp Briggs ELS engine 20 hours
    Third mower had a 25hp Kohler Engine 5 hours
    Forth mower had a 30hp Kohler Engine 5 hours

    The mowers were to run all day and night with just stops for fuel and oil checks. Every day we would go down to the same gas station and pick up fresh fuel once or twice a day. Fuel sled with 3 15gallon tanks.

    The first machine had been running 24 hours a day for 5 days
    Second for 20 hours
    Third and fourth were just started 5 hours before....

    it happened:

    All 4 mowers were shut down and refueled and oil checked. When we checked the oil.......all 4 of the crankcases were full, at least a quart or more oil in the crankcases. Didn't smell of gasoline at all.
    Hmmmmm all 4 engines were running good so the boss just decided to drain 'em and let them run, there was a chance the rings hadn't set on the low hour ones and who knows about the high hour one. First time this had ever happened ever.

    Engines drained, new oil and a refill of fuel and off they go again.......5 hours later we check again........all crankcases full AGAIN. Now we know we have a problem.

    Called the engine companies and they came out and did all types of checks but the engines were all in perfect working order. Compression good, power good all that. Was told there wasn't anything wrong with them. So we went back to running them and just draining the oil every time we stopped......2 days later the problem just went away never to return.

    Can you figure out what caused the crankcases to fill up?? We did figure it out a week or so after this all happened. So lets hear what you think.
     
  2. Darryl G

    Darryl G LawnSite Fanatic
    Posts: 8,033

    Poltergeist!
     
  3. mowisme

    mowisme LawnSite Senior Member
    Posts: 887

    crank case venting getting plugged due to conditions?
     
  4. Jimslawncareservice

    Jimslawncareservice LawnSite Platinum Member
    from mn
    Posts: 4,128

    I have no clue, I just want to know why.
    Posted via Mobile Device
     
  5. KrayzKajun

    KrayzKajun LawnSite Fanatic
    Posts: 10,742

    Ethanol in fuel ate throught the seals
     
  6. KeystoneLawn&Landscaping

    KeystoneLawn&Landscaping LawnSite Senior Member
    Posts: 774

    Cranky crankcase Troll?........Can't wait for the answer, I think I'm right! :laugh::laugh:......Seriously though, I was thinking floats hanging in carbs, but all 4 and you did say it wasn't gas. Looking forward to the answer.
     
    Last edited: Nov 18, 2011
  7. fastlane

    fastlane LawnSite Senior Member
    Posts: 347

    was it a neighbor who did not like the noise of mowers running 24hrs a day?
     
  8. Jimslawncareservice

    Jimslawncareservice LawnSite Platinum Member
    from mn
    Posts: 4,128

    What was the purpose of this test anyway
    Posted via Mobile Device
     
  9. davidcalhoun

    davidcalhoun LawnSite Bronze Member
    Posts: 1,022

    Hummmm, the neighbor theory............ Exmark came over and tried to sabotage your test.
     
  10. piston slapper

    piston slapper LawnSite Platinum Member
    Posts: 4,240

    Bad kanooter valve?
    You didnt buy your oil from the same guy that sold jack his beanstalk beans?
    Posted via Mobile Device
     

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