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D7 3T9753 / Pony Motor Magneto.

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Gary

03-08-2001 12:41:26

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I have a 3T cable bull dozer and am not getting spark on my pony motor to start it. Does anyone out there know about magnetos and how they work. Is it like points on an older automobile? Could they just be stuck. I have not taken it apart yet without knowing what may be wrong inside of there.

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hector gemme

02-10-2005 14:04:33

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Re: D7 3T9753 / Pony Motor Magneto. in reply to Gary, 03-08-2001 12:41:26

HI I HAVE SOME D7 USE PARTS

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Dan

03-09-2001 23:43:20

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Re: D7 3T9753 / Pony Motor Magneto. in reply to Gary, 03-08-2001 12:41:26

A magneto works simalar to a normal dist but
does not require a battery as it has a built in generator to provide its own power{this is a simple explanation} and has its own coil points
and condenser inside. I assume you had this cat
running before and has been parked for awhile. remove cap {4 screws} and remove rotar,using a proper point file, lightly file points ,they usually get a little corrosion on them when
not in regular use. Get a helper to crank pup motor while you watch for spark at
points. removing plugs makes this easier.If you
have a weak spark try filing a little more.If cant get any spark it will be necassary to remove it.

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Gary

03-11-2001 15:13:19

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Re: Re: D7 3T9753 / Pony Motor Magneto. in reply to Dan, 03-09-2001 23:43:20

I took the magneto off and could feel spark, thats right feel it. After I shocked myself a few times I figured that I must be getting spark. I used some different wires and got spark to the plugs but it is not regular. I can't spin the Pony motor fast enough to get the necessary spark. Any ideas?

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03-12-2001 10:16:12

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Re: Re: Re: D7 3T9753 / Pony Motor Magneto. in reply to Gary, 03-11-2001 15:13:19

sounds like you might have moisture or a cracked cap. You don't have to spin a Mag. fast to get spark, thats the purpose of the impulse. Theres a spring under the metal cap when you turn the cap it should turn part way then snap which spins the mag fast producing the spark. You might have dirt or a broke impulse spring if it doesn't snap when you turn it.

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Dan

03-13-2001 22:14:12

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Re: Re: Re: Re: D7 3T9753 / Pony Motor Magneto. in reply to f, 03-12-2001 10:16:12

When you reinstalled the mag did you wind it up
first? this would hard to explain here.

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Farmer-Gene

03-15-2001 08:10:55

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Re: Re: Re: Re: Re: D7 3T9753 / Pony Motor Magneto. in reply to Dan, 03-13-2001 22:14:12

also for you and others information, a magneto off a B john deer tractor will fit right on the D-7, thats what I got on mine.

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Gary

03-16-2001 09:48:42

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Re: Re: Re: Re: Re: Re: D7 3T9753 / Pony Motor Magneto. in reply to Farmer-Gene, 03-15-2001 08:10:55

What does it mean to wind up the mag.

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