Kawasaki sc420v stops after 20 seconds

Discussion in 'Mechanic and Repair' started by JMosby, May 22, 2007.

  1. JMosby

    JMosby LawnSite Member
    Messages: 2

    I have a mower that has been running perfectly for years. Now today it runs for about 20 seconds and then quits. After taking off the air cleaner I have discovered that oil is dumping into the carburator through some type of blow-by bypass hose. This oil floods into the carburator and kills the engine. What is causing this and how do I fix it?

    Thanks in advance.

  2. Restrorob

    Restrorob LawnSite Fanatic
    Messages: 11,029

    Check the oil, Is it over full and thin ? Does it smell like fuel ?

    Could be trash in the carb. that stuck the float needle valve open and filled the crankcase with fuel.
  3. JMosby

    JMosby LawnSite Member
    Messages: 2

    Looked at it today, and you were right. Fuel is in the crankcase. I will change the oil and clean the carburator. I've had it off and it looked good. There may have been some dirt in the bowl. I will change the fuel filter also. I can't tell if the float is OK and working. I think I will just put it all back together and take a chance. Thanks.

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