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In Reply to: Re: JD 316, Onan B43E, will not start posted by Bill on Wednesday, November 18, 2009:
It sounds like you have a bad sparkplug wire.
You can change the plug wires from one hole to the other by unscrewing the cap on the plug wire, and then unscrew the wire from the coil. It has a threaded stud inside the coil. Check to see if the plug wires have a wire or carbon core. (Wire is better).
See if the spark stays with the same wire. If you are using a sparkplug to check for spark be sure to use the same plug to test each wire one at a time.
The Onan coil dose in fact fire both cylinders at the same time as I stated earlier. If you try to test both wires at the same and one plug has a better ground than the other the one with the best ground will get all of the spark (electricity will always take the path of least resistance).
I will make a guess that the plug wire that won’t fire is the left hand or longer wire.
The fact that you are getting any fire out of the coil tells me that the points are at least operational and may only need adjusted.
I will see if I can dig up a schematic for you. I think I still have a service manual.
If you want to change the plug wires check with your local parts house. Most of them carry the boots, ends and sparkplug wire with a wire core. As for the points & condenser you will have to go to John Deere or an Onan dealer. The set will probably be about $50.00.
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