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Curtis B.
Curtis B., Technician
Category: Small Engine
Satisfied Customers: 28659
Experience:  have worked on and around most engine models for 35 yrs./Polaris ATV expert
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Hank. I have a late-model JD 420 Garden Tractor with the

Customer Question

Hi Hank.
I have a late-model JD 420 Garden Tractor with the Onan P220 motor. Lately the machine has been stalling after running for about 5-10 minutes. It cuts off completely and abrubptly (no stumbling - almost like the seat switch is triggered while running, but then it won't restart until it has cooled), so I am suspecting an ignition problem rather than fuel. How do I go about troubleshooting the problem? I don't believe I am getting a spark to either side when this happens (tested it by pulling plugs and grounding them while turning it over).
Thanks for any help you can provide!
Submitted: 2 years ago.
Category: Small Engine
Expert:  Curtis B. replied 2 years ago.

If no spark, most likely the coil is failing. Replace the coil!