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John Deere Tractors Discussion Forum
:

1951 M No power to coil

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av737doc

08-12-2019 17:27:56




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I just got the tractor. I was mowing and it started to backfire and died never to start again. Replaced the coil,sparkplugs,rotorcap and distributor cap. Still didn't run. I found the wiring was in bad shape so I replaced it. I'm not getting power to the coil?




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av737doc

08-23-2019 10:14:51




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 Re: 1951 M No power to coil in reply to av737doc, 08-12-2019 17:27:56  
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Hey guys....thanks for all the help !!!! I found I had a bad wire on the fusible link now have power to everything!!!! Again Thankyou



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old

08-13-2019 09:15:08




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 Re: 1951 M No power to coil in reply to av737doc, 08-12-2019 17:27:56  
A person needs to trouble shoot then parts never the other way around. When a tractor dies you need to #1 check for a good blue/white spark at te coil wire and at al plug wires that will jump a 1/4 inch gap or more.
#2Pull the carb drain plug and make sure you have a steady flow of gas thta will fill a pint jar in less then 3 minutes.



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av737doc

08-13-2019 06:00:25




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 Re: 1951 M No power to coil in reply to av737doc, 08-12-2019 17:27:56  
ok guys ...will try your advise!!! Thanks for all the help will let you know what the problem was.



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pcsaw

08-13-2019 05:22:07




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 Re: 1951 M No power to coil in reply to av737doc, 08-12-2019 17:27:56  
I had one that had a bad connection at the starter it would turn over but the wire going to the switch wasn’t getting good connection all the others have great advice



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John T

08-13-2019 04:25:49




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 Re: 1951 M No power to coil in reply to av737doc, 08-12-2019 17:27:56  
That's fairly easy to trace. Get your volt meter and/or 6/12 Test Light and find where voltage was lost. Have one lead to ground and probe for hot voltage with the other as follows: Start at the battery (has to be hot there I hope) then go to the Ammeter in and out then the fuse then Light Switch. I agree an open/blown fuse is a prime suspect but if not that look for a faulty switch that doesn't transmit voltage to the coil when ON or an open wire are my other suspects.

Let us know what it was, fuse or open wire or bad switch or something else ??????

John T

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James Howell

08-12-2019 23:11:19




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 Re: 1951 M No power to coil in reply to av737doc, 08-12-2019 17:27:56  
Agree with M-MAN to "check inline fuse above the battery".

Take a look at the Lamps and Wiring diagram below.

Note the red wire from the NEGATIVE terminal on the ammeter through the inline fuse to the BAT terminal on the switch.

Take a at the photos below.

Agree with M-MAN to "try the other switch positions. It will run in every position but off".

Take a look at the photo below.

Try either the HI or LIGHTS position.

Take a look at the Lamps and Wiring diagram below.

Note the blue wire from the IGN terminal on the switch to the NEGATIVE terminal on the coil.

You might consider using a test light on the NEGATIVE terminal on the coil to test the HI and LIGHTS positions.

Hope this helps.

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M-MAN

08-12-2019 19:05:47




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 Re: 1951 M No power to coil in reply to av737doc, 08-12-2019 17:27:56  
There's an inline fuse above the battery. Check it. Also try the other switch positions to prove it. It will run in every position but off.



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Centash

08-12-2019 18:28:39




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 Re: 1951 M No power to coil in reply to av737doc, 08-12-2019 17:27:56  
Ignition switch and or wiring to and from it.

Ben



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av737doc

08-12-2019 17:29:40




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 1951 M No power to coil in reply to jeremy in ne, 08-12-2019 17:27:56  
I just got the tractor. I was mowing and it started to backfire and died never to start again. Replaced the coil,sparkplugs,rotorcap and distributor cap. Still didn't run. I found the wiring was in bad shape so I replaced it. I'm not getting power to the coil?



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