View Full Version : Kawasaki sc420v stops after 20 seconds

05-22-2007, 09:51 PM
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.


05-22-2007, 10:30 PM
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.

05-23-2007, 10:13 AM
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.