Farmall Super A spark plugs

John Kenny · Nov 23, 2013

Hello, I see that the Farmall Super A used Champion 15-A. First of all how do I get them out (what size socket, 7/8? 18mm?)... the engine block is so tight it seems like the socket needs to be extra thin, is that my imagination? Also, is there a recommended modern plug? Thanks so much!

Super Trucker · Nov 23, 2013

Use a deep well chrome socket . I run autolight 386 or if a hotter one is needed 3116.

keh · Nov 23, 2013

Don't really know about A's, but a common spark plug socket in that era, and still is, is 13/16 or 21 mm.

KEH

Dave Sherburne NY · Nov 23, 2013

I think that's a 7/8" plug I used a 3/8"drive and it would fit down in that hole. C86 or hotter if it doesn't get used much

36 Coupe · Nov 23, 2013

18 mm thin 3/8 drive socket.Might be D21.

old · Nov 23, 2013

Well to be exact the plug socket size is 7/8 same as the ones in my BA half B half A. You need a thin wall socket to get them out. Auto lite plugs now days are the preferred brand due to the gas being what it is

36 Coupe · Nov 24, 2013

I should have said the plugs are threaded 18mm.They are 7/8 wrench size.You may have to use the old spark plug wrenches that were double ended and used rod to turn them.My old tool box I used in the 50s has a few of these wrenches.I have an early socket set that has stamped steel sockets.

Farmall Super A spark plugs

John Kenny

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Super Trucker

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keh

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Dave Sherburne NY

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36 Coupe

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old

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36 Coupe

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