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Magnetos, Ignition Coils and Spark Plugs Discussion about magnetos, buzz coils, spark plugs, ignitors and low tension coils.

Magnetos, Ignition Coils and Spark Plugs

1949 B John Deere with Magneto


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  #1  
Old 07-08-2008, 12:57:41 PM
MavGirl
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Default 1949 B John Deere with Magneto

Howdy- This is my first post. I have a friend who purchased a 1949 JD and I am curious even though I am a female. So...it seems to me that he should be able to install another magneto but does not seem willing to tackle the project but I have no fear and I would attempt to if I could get some detailed information as to what it takes. Any kind soul out there that could share with me some information about the magneto and other options of replacement and why or why not you should stay with the magneto? Thanks so much....
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Old 07-08-2008, 01:39:52 PM
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Default Re: 1949 B John Deere with Magneto

hi i have a 1944 jd b and it takes a wico type c magneto, and when you put it on thier is 2 marks on the flywheel one should say exhaust opes and the other it lh impulse i think and you have to line the right one up with the other mark next to the flywheel to time it right and before the mag is put on it has to be turned to the impulse let me know if you need more help i can dig my book out on it and give you more info cody
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Old 07-08-2008, 02:23:34 PM
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Default Re: 1949 B John Deere with Magneto

Cody- Thanks for your quick response. Sounds pretty simple...connecting the dots so to speak? Are there any specific tools that you have to have to install the mag? Do you have an Owners manual? Thanks again!
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Old 07-08-2008, 05:02:26 PM
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Default Re: 1949 B John Deere with Magneto

Quote:
Originally Posted by MavGirl View Post
Cody- Thanks for your quick response. Sounds pretty simple...connecting the dots so to speak? Are there any specific tools that you have to have to install the mag? Do you have an Owners manual? Thanks again!
pretty much connecting or lining up the dots. dont be afraid to jump in and ask questions.
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Old 07-08-2008, 10:54:40 PM
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Default Re: 1949 B John Deere with Magneto

Unbolt the old one....bolt on the new one..... If it won't start or backfires violently switch the plug wires. Good Luck!
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Old 07-09-2008, 02:32:15 AM
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Default Re: 1949 B John Deere with Magneto

no special tools needes just a 9/16 open end wrench, yopu have to turn the flywheel and line up the marks that say exhaust open then turn it and line up the other mark that says lh impulse which means left hand impulse then you have to take the mag and turn the back of it untill it stops holding it right side up then the mag is on the impulse then bolt it on its pretty simple and i do have a manual somewhere if you have any trouble i will dig the manual out for you
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Old 07-09-2008, 08:45:47 AM
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Default Re: 1949 B John Deere with Magneto

Thanks guys- you are all swell---helping out the damsel in distress- I am technically a city girl now but as the saying goes- you can take the girl out of the country but you can't take the country out of the girl-- I think guys with tractors and etc are awesome-Enjoy your day!
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Old 07-09-2008, 09:27:07 PM
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Default Re: 1949 B John Deere with Magneto

The lh impulse mark will line up on the compression and exhaust stroke. Remove the spark plug, make sure the piston's coming up on compression when lining up the timing marks.

J.I.M.
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Old 07-09-2008, 09:30:43 PM
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Default Re: 1949 B John Deere with Magneto

Here's a link for timing/installing the mag.
http://www.retiredtractors.com/Q/Timing.html

J.I.M.
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Old 07-10-2008, 10:26:55 AM
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Default Re: 1949 B John Deere with Magneto

What a great resource! You are great! Thanks.
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Old 07-10-2008, 10:50:37 AM
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Default Re: 1949 B John Deere with Magneto

Yup.... Tom is absolutely Correct... As long as the slot in the mag coupling is Horizontal like it should be when the Flywheel says LH Impulse you can just stick the mag on and if it don't start just change the wires.... Can't go wrong on a 2 Cylinder John Deere...

Also there were Some Wico Distributors used on the later John Deere Tractors that Looked almost Like a Wico Mag But were Not a Mag but a distributor... If the Mag seems to be Too Light... It might not be....
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