cletrac Bgs spark plugs

[47farmallm]

i got a 1940's model(forgot specific year), and its has the industrial style spark plugs and wire. does anyone know what spark plug this is, i know its a champion. i went to my local parts house and looked in there champion book and found the plug but there was no number listed. any help will be appreciated

[John Schwiebert]

Are they Military plugs, don't understand what you mean by "industrial" spark plugs?

[47farmallm]

yea i guess you could say that there the military style, they have the screw on wires that have the tip going inside of the spark plug.

[Robert Barbour]

The common spark plugs in use today are 14 thread size.  Plugs with 18mm threads were common in the sixties and before and are still available.  On old engines you can find some 7/8 nf thread plugs.  These are quite large and not easy to find but Champion still made them a few years ago.  The numbers on them changed quite a bit over the years.  I have some I will get the numbers from but that will take a week as they are at another location.

[Bob]

I've had best luck with Autolite plugs. I'll have to look and see what number, but they work quite well. Haven't had any foul yet compared to the new champion plugs. Can't be of any help on the military style plug wire combo...

Bob

[Blake Malkamaki]

The originals were Champion Commercials: 1 COMM, 2 COMM, or 3 COMM, each with a progressively higher heat range. They don't call them that, but they are still available from different manufacturers. These are 7/8" plugs.

Blake

[countryguy828]

Would you happen to have Manufactures and Part numbers for these? I will need a set of 7/8 for my HG someday...someday.

Dave

[47farmallm]

thanks guys for all the replies. it doesn't matter to me the manufacture, i just need a good number

[Blake Malkamaki]

I believe Champion W-18 replaces Champion 1-COMM http://www.ebay.com/itm/Champion-W18-7-8-Spark-Plug-/270552130901

You should be able to get them from a local NAPA or other auto parts store.

[47farmallm]

the w-18 is nothin like the plug i got. i got a military/industrial type plug. instead of a tip its got a hole and threads where the wires screw onto the plug. i guess i need to take a pic huh   

[Blake Malkamaki]

Are they waterproof plugs like airplanes and some military vehicles have?

[47farmallm]

yep that would be them, water proofed, industrial/military style plugs

[Bob]

I know what you are talking about, just have never been around them

[phoenix]

HI go carefull using champion the new ones are a load of trouble with a magneto new name for them is crapion!! ,once gave my fordson (n) a pre season service including new correct plugs ,wound that engine over all one afternoon would only cough and fart, re installed old plugs fired right up on first half pull up on handle sending a load of crap up the exhaust pipe hence i will not look at a nother champion
(try autolite)     
All the best for Christmas from north north yorkshire