No spark

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Preston Fanin
Posts: 3
Joined: Mon May 29, 2017 12:08 pm
Zip Code: 24566
Tractors Owned: 1949 farmall cub

No spark

Postby Preston Fanin » Fri Jun 09, 2017 9:09 pm

:lost: 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?

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John *.?-!.* cub owner
Team Cub Guide
Team Cub Guide
Posts: 22763
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

Postby John *.?-!.* cub owner » Fri Jun 09, 2017 9:41 pm

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!!!

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Glen
5+ Years
5+ Years
Posts: 2624
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

Postby Glen » Fri Jun 09, 2017 10:24 pm

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

Preston Fanin
Posts: 3
Joined: Mon May 29, 2017 12:08 pm
Zip Code: 24566
Tractors Owned: 1949 farmall cub

Re: No spark

Postby Preston Fanin » Sat Jun 10, 2017 2:46 pm

Thank y'all! Will see what we can do on the upcoming week.


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