My John Deere 445 v-twin 22hp electronic fuel injection overhead valves ,K series design 02/98 350 manhours lawntractor, will not start. Parked it running fine, came back a week later and no start. Installed new sparks plugs, and nothing, checked the spark, and no fire. It turns over strong , but no fire. getting gas, but not sure about how strong the flow. , All fuses are good, SO WHY WON"T IT START.>

 

Hello Blair 101!

That engine is one that I have not gotten familiar with yet. The problem could be somewhere other than the engine though, like in a bad safety switch. Is it in neutral? PTO turned off? full of oil? (there is probably a low-oil sensor that kills ignition if low). Were the spark plugs touching a metal part of the frame when you checked for spark?

 

More then likely it is a safety switch/contact that is not functioning correctly. There are switches under the seat and on the PTO somewhere. They should be normally closed switches that are easy to check with a multimeter or continuity tester. Good luck.
Luke

 

Thank You, the safety switch under the seat was the problem. It apeared to have just corroded, and could not make contact.

 

Great! I'm glad we could help!