1947 farmall 6 volt coil

Tue Jun 11, 2013 1:50 pm

I inherited a 47 farmall cub, left to me by my father who passed away years ago, it's been sitting for awhile, I noticed it has a mag and the coil is inside of it, which has been soaked in oil, does anyone know how it would get soaked with oil, and how to prevent this from happening again, I believe there must be a seal leaking?, and I saw on this forum that someone mentioned getting a coil at napa would that person know what number it is? thanks for any help this is a great forum that I just recently came upon

Re: 1947 farmall 6 volt coil

Tue Jun 11, 2013 8:28 pm

Conrad:

G'day to you :) So you are going to try to get your Father's Cub up and running? That would be great I think. There is a lot to say for a Cub with a strong family connection.

First to answer your questions:

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As you can see from the diagram above, there is a gasket between the cover and the body of the mag. If that gasket is dry and cracked there could be leakage there - usually moisture though. Same if the cap had a crack in it. You will need to dry it out and then get a new gasket or make one.

I am unsure if you mean that the coil is soaked with oil or it appears that it has been soaked with oil and has a black wrapping on it? You can get replacement coils - on :eBay: - Farmall Cub Magneto Coils. You must keep the steel core that is in your magneto as replacement cores are simply not available.

Most folks who get coils at NAPA are getting external and not internal coils.

Suggest you follow the links below as there is a lot of resources available to our members.

Image to Farmallcub.com :big smile: Forum Family. And you have come to the right place for all things Cub related. If you click on the Site Rules, Regulations, & Important Information, it will point you to :arrow: the Welcome Wagon wherein you will find links to many useful sites and topics. One of which is the Cub Manual Server. Enjoy!.

Re: 1947 farmall 6 volt coil

Tue Jun 11, 2013 10:33 pm

If there was oil in the front of the magneto when you removed it, you need item 19 in this diagram. Note, it instals from the magneto side. if no oil there, someone may have been over oiling the magneto.
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It is the circle you can see around the drive in this picture.
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Re: 1947 farmall 6 volt coil

Wed Jun 12, 2013 2:25 pm

thanks rudi and john, the reason I noticed the oil is because I had no spark, and found the coil soaked in oil, i'll check those gaskets thanks for you help conrad

Re: 1947 farmall 6 volt coil

Wed Jun 12, 2013 3:39 pm

conradbegin wrote:thanks rudi and john, the reason I noticed the oil is because I had no spark, and found the coil soaked in oil, i'll check those gaskets thanks for you help conrad

Aren't coils oil-filled? Never had one apart or leak on me but was thinking I heard or read that.

Re: 1947 farmall 6 volt coil

Wed Jun 12, 2013 6:52 pm

Denny, He's talking about a mag coil I think.

Bob

Re: 1947 farmall 6 volt coil

Thu Jun 13, 2013 11:48 am

Denny Clayton wrote:Aren't coils oil-filled? Never had one apart or leak on me but was thinking I heard or read that.


That's what I heard/read too, Denny. Shouldn't make a difference whether it is a mag or battery coil, they should both work the same even if they are different shape.

Re: 1947 farmall 6 volt coil

Thu Jun 13, 2013 3:45 pm

bythepond88 wrote:
Denny Clayton wrote:Aren't coils oil-filled? Never had one apart or leak on me but was thinking I heard or read that.


That's what I heard/read too, Denny. Shouldn't make a difference whether it is a mag or battery coil, they should both work the same even if they are different shape.

That was my thought. My original point was maybe the coil was leaking and was the source of the oil.

Re: 1947 farmall 6 volt coil

Thu Jun 13, 2013 4:08 pm

I guess I just can't visualize a mag coil having oil in it. Guess I'll have to find a worthless one to open up.

Bob

Re: 1947 farmall 6 volt coil

Thu Jun 13, 2013 5:21 pm

I don't believe the magneto coil is oil filled.

Re: 1947 farmall 6 volt coil

Thu Jun 13, 2013 9:08 pm

I have torn them apart, a magneto coil is not oil filled. They are just wires and insulation around a core.

Re: 1947 farmall 6 volt coil

Fri Jun 14, 2013 5:02 am

I suspect the oil was from someone "over-oiling" the mag, as John suggested. I have seen small amounts of oil in the impulse area due to a leaking seal, but a coil with oil on it usually comes from a well-intentioned but mis-informed owner squirting too much oil in the oil fill cap. It only takes a couple drops per year to keep them oiled.

Re: 1947 farmall 6 volt coil

Fri Jun 14, 2013 6:55 am

thanks for the info gang, you'all are probably right from oiling I noticed an oil cap, when I get a new coil I'll pay attention to that, thanks again gang