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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

Wanting info to make Magneto Tester "spark rack"


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  #1  
Old 03-21-2017, 09:38:53 PM
Jimmys Tractors Jimmys Tractors is offline
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Default Wanting info to make Magneto Tester "spark rack"

Well, I'm having a heck of a time finding a magneto tester so I figure I'm going to make one. Can anyone give me any tips on how to make a "spark rack"? Idk what the true name is, but I'm speaking if the board with the electrodes on it to see spark.
Probably going to use a board and an old magneto to make a pattern on to make a simple stand amd may make some wood couplers to adapt some sort of electric drill or other motor to. If I went tbe electric motor route, how what hp rating is suggested and can any motor be adapted to be "variable speed"? Thanks for any info!
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Old 03-21-2017, 10:19:27 PM
eddie bedwell eddie bedwell is offline
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Default Re: Wanting info to make Magneto Tester "spark rack"

Hi Jim,
Google often finds just what we are seeking.

https://www.youtube.com/watch?v=VrUf_xkNfDg

Cheers,
Eddie B.
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Old 03-22-2017, 08:39:15 AM
Jimmys Tractors Jimmys Tractors is offline
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Default Re: Wanting info to make Magneto Tester "spark rack"

Yes, but sometimes Google doesn't give back that friendly human interaction we all love
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Old 03-22-2017, 07:33:53 PM
Mark Dieckmann Mark Dieckmann is offline
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Default Re: Wanting info to make Magneto Tester "spark rack"

This is what I use. The adapter chucks into a drill or I have used it on my Shopsmith. The alligator clips hook to a wire or a wire terminal on a distributor. Make sure you ground the adjustable screw side so you can adjust it while running.
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Old 03-22-2017, 07:39:32 PM
Mark Dieckmann Mark Dieckmann is offline
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Default Re: Wanting info to make Magneto Tester "spark rack"

Here is the pic
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Old 03-22-2017, 07:46:01 PM
Thaumaturge Thaumaturge is offline
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Default Re: Wanting info to make Magneto Tester "spark rack"

Why not use four neon lamps? Jameco still sells them fairly cheap. Look for NE-2.
Doc
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Old 03-22-2017, 10:35:53 PM
John Hanson John Hanson is offline
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Default Re: Wanting info to make Magneto Tester "spark rack"

I remember back in aircraft mechanic's school, we were running mags that we'd rebuilt. One kid had his all hooked up and spinning, but someone had opened the gaps on the rack way too wide...so ol' Dean grabs the metal thumb screw and starts cranking it down. Of course it bit him...almost knocked him on the floor!!! We were all cracking up....and then he does it again to the next one!!! I about died!!!
JH
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Old 03-23-2017, 03:21:32 PM
Andrew Mackey Andrew Mackey is offline
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Default Re: Wanting info to make Magneto Tester "spark rack"

Find a piece of 2" aluminum angle iron. Drill and tap for the plugs you are going to use. Ground it to the base of the magneto and run high tension wires to the plugs. If you make the holes for 7/8" plugs (22mm, you can get adapters to allow other plugs to be mounted in the holes (18mm, 14mm, 10mm etc), or just drill and tap one size if you just want to check the mag only. As for a drill, any 1/4 up to 1/2 HP variable speed, reversible drill with a 1/2" chuck should work. You can chuck in an adapter for a socket and drive almost any mag with it. You just need an adapter to drive the mag.
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Old 03-25-2017, 06:22:12 PM
Jimmys Tractors Jimmys Tractors is offline
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Default Re: Wanting info to make Magneto Tester "spark rack"

Thank you all for your help. I think Im going to make something similar like the video, but instead of a jumper cable end, im going to put a long ground wire on it to attach to the magneto and do like you had in your pic: make an adapter and run it with a strong drill. Thank you gentlemen! Gonna work on building a magnetizer as well. Would love to rebuild magnetos on the side more often. Being 24 yrs old I know more than other guys my age and Id love to get better
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Old 03-26-2017, 08:51:39 AM
Mark Dieckmann Mark Dieckmann is offline
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Default Re: Wanting info to make Magneto Tester "spark rack"

You don't need a "strong" drill. I run mags easily with a cordless drill. My homemade bench has a 1/12 HP circulation pump motor, but it sometimes can't overcome the impulse without a run at it. Once running it's fine.
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