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J 4 Magneto

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John *.?-!.* cub owner
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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: J 4 Magneto

Postby John *.?-!.* cub owner » Sat Nov 14, 2015 9:57 am

I replied to this before, but for some reason it apparently did not post. When timing the J4 there is only one click, not a second one. There are instructions in the HOW TO section, but basically turn the mag with top as close to engine as possible, set engine to #1 (front) piston at TDC with the timing mark and pointer lined up, then rotat magneto away from engine till it snaps. It frequently will turn a little to far due to the spring releasing, so you may need to turn it back just a little afterward, and tighten a bolt. Turn the engine over a couple times to make sure it is tripping at the mark, tighten both bolts, DONE.
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49wvcub
5+ Years
5+ Years
Posts: 2
Joined: Sun Nov 15, 2015 8:24 pm
Zip Code: 26833

Re: J 4 Magneto

Postby 49wvcub » Sun Nov 15, 2015 8:28 pm

Thanks

Clip
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Posts: 230
Joined: Thu Jul 10, 2014 7:18 am
Zip Code: 28479
Circle of Safety: Y

Re: J 4 Magneto

Postby Clip » Sun Nov 15, 2015 10:03 pm

Just make sure to have it grounded through a spark plug or other path to release the energy as it turns over when you're testing it.

User avatar
John *.?-!.* cub owner
Cub Pro
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: J 4 Magneto

Postby John *.?-!.* cub owner » Sun Nov 15, 2015 10:36 pm

Clip wrote:Just make sure to have it grounded through a spark plug or other path to release the energy as it turns over when you're testing it.

Agreed, or if on tractor make sure it is turned off. Also make sure your hand is not on the side terminal when testing it. :oops:
If you are not part of the solution,
you are part of the problem!!!


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