Kohler engine quits

Wayne in MN

Well-known Member
Kohler engine: about 21 years old
Family:SHK624UL1G2RA
Model: CH 18 S
Spec:62513
CC: 624
Serial#: 2507412957

Engine runs great for 10 minutes while mowing then sputters to a stop./ Wait 5 minutes and it runs for another 5-10 minutes and quits.
This pattern of RUN-QUIT-WAIT-RUN, etc. continues as long as you want to take frequent coffee breaks. This is not a fuel related problem.
Engine has to be removed from Simplicity rider to get shroud off engine to gain access to ignition system.
Any suggestions? Thank you.
 
Get a couple in-line spark testers and put them on. run it until it starts sputtering, and look at the spark testers to see if they are still blinking. its highly unlikely that both coils are failing at the same time. I am thinking you could unhook the white wire at the engine harness plug and see if that makes a difference.

You say its not fuel related. That would be my first guess. Perhaps the fuel cap is no longer venting. It could also be the fuel solenoid dropping out or losing power from the chassis.
 

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