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John Deere 140 No spark

8502 Views 34 Replies 8 Participants Last post by  lisle
Ive got an early i believe John Deere 140. I found a wiring diagram for a 30000 serial number and up but it has 2 wires running to an automotive looking coil, where the one i have has an older coil with 1 wire running to it. I would go get the serial number but its late and its out in the shop...

Ive got no power to the coil when i turn the key on, but when i crank the engine i do get power pulsing to that wire. Would that suggest a bad coil? or should the coil have more constant power.
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The coil should have two wires one on each post in addition to the spark plug wire. Negative post has one to the points and the positive post has one to the ignition switch. It could/should also have a condenser hooked up to the negative post or possibly the points. The pulsing means the points are working. Welcome to WFM. Roger
Matt when new these early electronic ignitions had severe failure rates. That is why they were only made one year and why most were converted to normal battery points coil ignition. In other words all the things you are describing were happening 45 years ago and Kohler gave up on the system. That makes it an interesting oddity but not one you can depend on to run every or all day. Good luck with it. Roger
Matt take the cover in the picture off. That is where the points live and then follow Colton's advice. I doubt it will cost $75 to make the change. Roger
Colton the stator only charges the battery and as such really has nothing to do with the ignition except charge the battery. My bad on points location. Roger
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