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John Deere Tractors Discussion Forum
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Re: John Deere M running on 1 cyliner

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Plant Doc

07-06-2014 15:16:30

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Jay: You said you overhauled this M? Has it ever fired on both cylinders after the overhaul? If not I would be looking at the Distributor timing. I suggest you bring up #1 cylinder on compression and look at where the distributor rotor is pointing. Then do the same with #2 cylinder and check the position of the rotor. My guess is, if this M has never fired on both cylinders after the overhaul that either the oil pump is off a tooth or two or the distributor needs to be turned about 45 degrees in the direction the rotor turns. If I misunderstood and this M has fired both cylinders after the overhaul, then disregard all of the above.

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Jay Chrisman

07-06-2014 16:10:11

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 Re: John Deere M running on 1 cyliner in reply to Plant Doc, 07-06-2014 15:16:30  
No never fired on 2

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07-06-2014 21:07:29

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 Re: John Deere M running on 1 cyliner in reply to Jay Chrisman, 07-06-2014 16:10:11  
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This may have been answered, but I didn't see it in a quick scan. Is there *spark* at #2? Pull the plug, put in on the wire and hold it to ground. It ought to show nice spark (at least as big and bright as cylinder #1 does).

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