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1947 B spark plugs

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35A

12-27-2007 04:46:20

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I bought a set of plugs for our B at NAPA. They insist that they gave me the correct plugs. Trouble is, the plugs go into the block so deeply that you can't get a wrench on them. [ or a socket for that matter] What plugs do I need? Anyone else have defective parts men? Thanks guys! LEH

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Sam in WA

12-27-2007 11:41:38

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Re: 1947 B spark plugs in reply to 35A, 12-27-2007 04:46:20

I run champion 516(D16) plugs in our 48 B. There is just enough room to get the 7/8 or 13/16 socket on a ratchet in there. i haven't had a problem with any Chamion plugs that I get from our local Carquest parts store (then again we have a few excellent parts men up here).

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Sam in WA

12-27-2007 11:41:31

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Re: 1947 B spark plugs in reply to 35A, 12-27-2007 04:46:20

I run champion 516(D16) plugs in our 48 B. There is just enough room to get the 7/8 or 13/16 socket on a ratchet in there. i haven't had a problem with any Chamion plugs that I get from our local Carquest parts store (then again we have a few excellent parts men up here).

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johndeereman

12-27-2007 08:09:30

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Re: 1947 B spark plugs in reply to 35A, 12-27-2007 04:46:20

i have a 43 jd b i run autolite 3116 i think thats the number i have to use the open end of a 7/8 wrench to get mine out i put it in from the front of the tractor only get a 1/8 of a turn at a time mine was fouling plugs same as yours i ended up changing the lugs on the mag works great now

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jd b puller

12-27-2007 05:45:24

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Re: 1947 B spark plugs in reply to 35A, 12-27-2007 04:46:20

Ask for an AC 86 or 87 or 88.
They go from cool to hot in that order. 87 would probably be fine. Now if your parts guy knows what he's doing, you'll be fine. Otherwise they'll have to look them up. try looking under C87, I think that's how it's in the NAPA system.

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Mike M

12-27-2007 05:03:36

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Re: 1947 B spark plugs in reply to 35A, 12-27-2007 04:46:20

What plugs # did you get ?

And what is your tractor serial number ? before 201,000 ?

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35A

12-27-2007 06:27:43

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Re: 1947 B spark plugs in reply to Mike M, 12-27-2007 05:03:36

B 184 765. It tends to foul plugs under light loads. Not real bad, but I'm tired of cleaning them & can't stand to hear it stumble around as it runs good when they are clean. Mag was gone through a year ago. [Wico C ] I'll have to go down & fight one out to get the no. off them. I do not believe it has a power block, but it does have a gas manifold & it was an all fuel from the factory.Does not burn oil. Pulls good on the corn shreder [as seen on u-tube] Thanks for the help

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John T

12-27-2007 08:15:58

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Re: 1947 B spark plugs in reply to 35A, 12-27-2007 06:27:43

The Wico C Mag isnt known for any super hot spark ya know. Things that can help reduce preamture fouling are as follows:

Use the hottest range of non resistive spark plugs available, that would be like a 3116 in Autolite or the Champions or AC equivalent, or Autolite 3077 in the unstyled 7/8 plug..... .use wire core NOT carbon core suppressor type plug wires,,,,, ,,keep the points gapped n clean n adjusted,,,,, ,,,,,dont run the carb any richer then necessary,,,,, use shutter or air restriction to get n keep the temp up to 180 n over,,,,, , PUT EM TO WORK

John T

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Mike M

12-27-2007 06:57:10

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Re: 1947 B spark plugs in reply to 35A, 12-27-2007 06:27:43

If your fouling is dry and fluffy then it is from too rich of carb. mixtures. If it is wet and oily then it is oil or antifreeze.

I have a problem getting a socket on one or two of my tractors from that era. I can't remember if it is the A or the B that is worse ? They originaly made a stamped steel spark plug wrench that was thin enough to clear the block recess. You can grind down the outside of a socket to fit better. I have to run the Champion D23 plugs as they are alot longer in the base and easier to get out. I normally run Autolite 388 plugs and copper core wires.

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John T

12-27-2007 05:33:28

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Re: 1947 B spark plugs in reply to Mike M, 12-27-2007 05:03:36

Good question Mike, Im NOT the go to guy for specs or data, and Im just familair with the 7/8 plugs for the unstyled 38 n older and 18 mm for the styled (a 47 sure is styled, started in 39), I also wonder what they gave him or if his tractor has been modified????? I guess he means the hex/wrench size of the plug is too big to allow a socket between it n the blocks bore where the plug sits down in, looks like thats the problem he has, still dont sound quite right

John T

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