Lately, when mowing, it would back fire and quit running. After waiting for afew seconds, it would restart with no more problems. It seemed as though it was flooding. I changed the air filter, fuel filter, spark plug, oil and oil filter - after replacing these, it won't start at all. I switched plugs with no change. I pulled the flywheel and checked the pin, no problems. Can the coil be having an intermittent problem? Carb? Safety kill switches?

Hi! Jmustang, welcome to AMHD :)

Lately, when mowing, it would back fire and quit running. After waiting for afew seconds, it would restart with no more problems. It seemed as though it was flooding. I changed the air filter, fuel filter, spark plug, oil and oil filter - after replacing these, it won't start at all. I switched plugs with no change. I pulled the flywheel and checked the pin, no problems. Can the coil be having an intermittent problem? Carb? Safety kill switches?
From an AMHD search:
askmehelpdesk.com/tools-power-equipment/15-hp-kohler-john-deere-rider-wont-start- (https://www.askmehelpdesk.com/tools-power-equipment/15-hp-kohler-john-deere-rider-wont-start-292526.html)

Hi,
You have a sheared flywheel key; Deere part# 26H74. It is a 3/16" X 5/8" woodruff key.
Peace,
Clarke