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daveingreenbay View Drop Down
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Joined: 09 Oct 2009
Location: Green Bay
Points: 245 		Post Options Post Options   Thanks (0) Thanks(0)   Quote daveingreenbay Quote  Post ReplyReply Direct Link To This Post Topic: Mag question
    Posted: 15 Apr 2010 at 8:50pm
Anyone know what  the application is for a Fairbanks Morse K4B might be?  Seems to be just a tad larger than a FMJ 4B3.  Do coils, points interchange?  TIA
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TomMN View Drop Down
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Joined: 13 Sep 2009
Location: Elbow Lake, MN
Points: 858 		Post Options Post Options   Thanks (0) Thanks(0)   Quote TomMN Quote  Post ReplyReply Direct Link To This Post Posted: 16 Apr 2010 at 12:12pm
The K4B is older than the J and was used on many AC's when it was the current model.  In the pictures of my grandpa's RC from when it was new it's easy to see it has the K series.  The J series is smaller mostly because the magnet in the rotor is newer better magnetic material.  I think a J coil can be used in a K housing, it doesn't fit quite right but works.  The K coil will not fit in a J housing though.  I don't think any other parts are the same either.
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Steve in NJ View Drop Down
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Joined: 12 Sep 2009
Location: Andover, NJ
Points: 11887 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Steve in NJ Quote  Post ReplyReply Direct Link To This Post Posted: 16 Apr 2010 at 9:24pm
Tom is right on wit' dat. The original "K" series coils with the tower top are getting tough to find anymore. The "J" style coil will work. Doesn't fit real good as Tom said, but it'll git' the job done......
Steve@B&B
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daveingreenbay View Drop Down
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Joined: 09 Oct 2009
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Points: 245 		Post Options Post Options   Thanks (0) Thanks(0)   Quote daveingreenbay Quote  Post ReplyReply Direct Link To This Post Posted: 16 Apr 2010 at 10:03pm
The K4B I have has the original coils and points.  It works, but the spark is not very strong.  Not sure what I will do with it yet.  Thanks for all the responses
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