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No spark
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- 5+ Years
- Posts: 3
- Joined: Mon May 29, 2017 12:08 pm
- Zip Code: 24566
- Tractors Owned: 1949 farmall cub
No spark
we have rewired my cub to a 12v system and left the magneto on it. Finally got to a point today to try turning the motor over and found there is no spark. What should We look for so we can get this old girl going?
- John *.?-!.* cub owner
- Cub Pro
- Posts: 23701
- Joined: Sun Feb 02, 2003 2:09 pm
- Zip Code: 63664
- Tractors Owned: 47, 48, 49 cub plus Wagner loader & other attachments. 41 Farmall H.
- Location: Mo, Potosi
Re: No spark
Rewiring to 12 volts should have nothing to do with magneto, unless it has an external coil. First suggestion would be to disconnect the kill wire on the side of magneto and see if spark comes back. Also, check spark at wire from coil cover to distributor cap.
If you are not part of the solution,
you are part of the problem!!!
you are part of the problem!!!
- Glen
- 10+ Years
- Posts: 6115
- Joined: Mon Mar 19, 2012 7:33 pm
- Zip Code: 00000
- Tractors Owned: 1956 Farmall Cub with Fast Hitch, F-11 plow, Disc, Cultivator, Cub-22 mower
- Circle of Safety: Y
- Location: Wa.
Re: No spark
Hi,
There are ignition points in the magneto, they need replacing, if they haven't been replaced in years, they affect the engine starting, and running smoothly, if they get burned enough, the engine won't run, there will not be any spark.
The condenser could have quit, then there would be no spark.
Or the coil could have quit, it is common for original Cub coils to quit.
The points and condenser are less money to buy than a new magneto coil, so you could start by replacing those.
Below is a page from the Cub owner's manual telling how to service the points.
Below that are listings at TM Tractor showing new points and condenser, and a coil, if you want to see them.
http://farmallcub.com/rudi_cub/www.clea ... e%2030.jpg
http://www.tmtractor.com/new/el/367fp.htm
http://www.tmtractor.com/new/el/713fp.htm
There are ignition points in the magneto, they need replacing, if they haven't been replaced in years, they affect the engine starting, and running smoothly, if they get burned enough, the engine won't run, there will not be any spark.
The condenser could have quit, then there would be no spark.
Or the coil could have quit, it is common for original Cub coils to quit.
The points and condenser are less money to buy than a new magneto coil, so you could start by replacing those.
Below is a page from the Cub owner's manual telling how to service the points.
Below that are listings at TM Tractor showing new points and condenser, and a coil, if you want to see them.
http://farmallcub.com/rudi_cub/www.clea ... e%2030.jpg
http://www.tmtractor.com/new/el/367fp.htm
http://www.tmtractor.com/new/el/713fp.htm
-
- 5+ Years
- Posts: 3
- Joined: Mon May 29, 2017 12:08 pm
- Zip Code: 24566
- Tractors Owned: 1949 farmall cub
Re: No spark
Thank y'all! Will see what we can do on the upcoming week.
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