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Ye ole d4 no spark

Ye ole d4 no spark

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mcbitchman
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Hello,

I have a Cat d4 from the thirties....serial number 4g4637w. It has a Eisemann magneto model RC 2H but I've got no spark.... oh this is for the pony motor.... I had spark last fall when we parked it but not now. I went into the mag today and cleaned pts, even though they looked good... no spark.... looked for sparking at pts no spark.... any thoughts? I've been told condenser.... I even turned it over w/ a drill stuck into the input shaft in the middle of the pull start pulley/flywheel. I'm thinking pts and condersor,,,,, could it be in the coil and if so how does one test the coil and condenser... with an ohm meter? anybody know the values involved..... like to keep it stock if it is as old as they say..... thanks in advance... Doug Horvath,,,, here in Oregon where the trees are pretty tall... lol... [attachment=43084]DSC06400.jpg[/attachment]
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Sun, Jun 18, 2017 6:43 AM
Old Magnet
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Coil should read about 6300 ohms to be good. Condenser 0.24 micro farads.
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Sun, Jun 18, 2017 7:38 AM
edb
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Reply to Old Magnet:
Coil should read about 6300 ohms to be good. Condenser 0.24 micro farads.
Hi,
maybe try disconnecting the Mag Switch ground wire and see if the switch/wire is faulty.
Cheers,
Eddie B.
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Sun, Jun 18, 2017 8:35 AM
neil
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Reply to edb:
Hi,
maybe try disconnecting the Mag Switch ground wire and see if the switch/wire is faulty.
Cheers,
Eddie B.
I had my RC-2H done up by a mag shop and it looks brand new. He did condensor, cap, rotor - coil was good. You can definitely keep it stock.
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Sun, Jun 18, 2017 9:42 AM
mcbitchman
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Reply to Old Magnet:
Coil should read about 6300 ohms to be good. Condenser 0.24 micro farads.
not sure how to measure for farads..... is there a chance the magneto is not magnetized,,, I see a lot of videos on YT that show folks magnetizing their magnetos... ouch.... how bout using a auto coil and condenser powered by a twelve volt cordless drill battery and using the stock pts and the rest of the distributor sending a coil wire through the bottom of the mag and attacing to the copper contact inside....
thanks for all the help,,,, I've worked on lots of equip but never antique stuff... Doug

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Tue, Jun 20, 2017 7:46 AM
drujinin
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Reply to mcbitchman:
not sure how to measure for farads..... is there a chance the magneto is not magnetized,,, I see a lot of videos on YT that show folks magnetizing their magnetos... ouch.... how bout using a auto coil and condenser powered by a twelve volt cordless drill battery and using the stock pts and the rest of the distributor sending a coil wire through the bottom of the mag and attacing to the copper contact inside....
thanks for all the help,,,, I've worked on lots of equip but never antique stuff... Doug

You can take a condenser, put it across the posts on a battery for a few seconds to charge, then fold the wire back onto the can(body) to jump a stored spark. Works best in the shade or a dim room! File the points and spin the mag while holding your finger against the center contact, If you get a shock you know its good! :eek2: I usually get some smart aleck know it all to help with this test! :dance:
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Tue, Jun 20, 2017 7:57 AM
mcbitchman
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Reply to drujinin:
You can take a condenser, put it across the posts on a battery for a few seconds to charge, then fold the wire back onto the can(body) to jump a stored spark. Works best in the shade or a dim room! File the points and spin the mag while holding your finger against the center contact, If you get a shock you know its good! :eek2: I usually get some smart aleck know it all to help with this test! :dance:


now that is funny..... by good do you mean the mag as a whole or the coil.... I'm going to test the coil now and the condenser also if they are good the only thing left if the coil ...... so here we go.... thank you.... Doug
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Tue, Jun 20, 2017 8:02 AM
Old Magnet
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Reply to mcbitchman:


now that is funny..... by good do you mean the mag as a whole or the coil.... I'm going to test the coil now and the condenser also if they are good the only thing left if the coil ...... so here we go.... thank you.... Doug
That rating on the condenser/capacitor is pretty low, I don't think you'll get a noticeable spark out of it. Let us know if you do. Any good multimeter should have a capacitance measuring capability.
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Tue, Jun 20, 2017 9:20 AM
mcbitchman
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Reply to Old Magnet:
Coil should read about 6300 ohms to be good. Condenser 0.24 micro farads.


One more thing,,, when checking a coil are we testing between the wire and the small tab that acts as a contact from coil to cap? and the wires are all connected to the condenser incl from pts , from coil and from kill switch... correct me if I'm wrong ,, thank you,,,, Doug
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Tue, Jun 20, 2017 10:44 AM
Old Magnet
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Reply to mcbitchman:


One more thing,,, when checking a coil are we testing between the wire and the small tab that acts as a contact from coil to cap? and the wires are all connected to the condenser incl from pts , from coil and from kill switch... correct me if I'm wrong ,, thank you,,,, Doug
Lift the two leads coming off the coil and get a reading. One is the ground to case the other is hot. The leads need to be lifted/disconnected to get a good reading.
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Tue, Jun 20, 2017 11:48 AM
mcbitchman
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Reply to Old Magnet:
Lift the two leads coming off the coil and get a reading. One is the ground to case the other is hot. The leads need to be lifted/disconnected to get a good reading.
my coil has only one wire.... there is a small copper tab that sticks out of it on the side that contacts the cap in the center, should I figure on that being one of the "wires" ? The thing that really bugs me is that I don't know for sure that the mag is making any power.... and how does it send that power to the coil? there are no wires coming out of the inner part of the mag, only the wire from the coil and the kill wire along w/ the wire to the condenser to the pts.... so how is the power getting into the coil? I thought of using an auto coil and a small twelve volt cordless tool battery at least that way I'd know there was power there....
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Tue, Jun 20, 2017 1:00 PM
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