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Spark Plug List

7/8" spark plugs cold down to hot
New Champion	Old Champion	A--C	Auto Lite	Edison	Bowers	Globe	Blue Crown	Leonard
W-10	0 Com	73 Com		40-T	C78-C	6	73-Com	4-F
W-14	1 Com	74 Com	T-7	37-TS	C78-N	7	74-Com	4
W-18	2 Com	C 77L	T-9	35-S	78-N	8	75-Com	3
W-20	3 Com or No 20	78 Com	T-11	31-T	78-H	9	76-Com	2-A
W-89D	44	18	3077			10	78L-Com	1-A
W-85N	901
W-95D	45

The bottom three plugs are special extension models Recommended torque for a cast iron head is 37 lb-ft 35 lb-ft for aluminum

10 mm cold down to hot
New Champion	Old Champion	A--C	Auto Lite	Edison	Bowers	Globe	Blue Crown	Leonard
UY-6	Y-4A	104	P-4	3-S	10C	F-10	T-4	10-F
UY-6	Y-6	106		4		F-11	T-6	10-E
UY-6	Y-8	108	P-6	2-S	10N	F-11A	T-8	10-D

Recommended torque for cast iron head is 14 lb-ft 12 lb-ft for aluminum

14 mm cold down to hot
New Champion	Old Champion	A--C	Auto Lite	Edison	Bowers	Globe	Blue Crown	Leonard
J-57-R	J-2	42	A3	58-T	C14S	12A	M-2-Com	14-G
H-8	H-9	43L	A5	57-TS	14C	13	M-4-Com	14-F
CJ-8	J-8	45	A7	55-S	14N	14	M-7	14-E
UJ-12	J-12	47	A11	52	14H	15	M-11	14-C

Recommended torque is 30 lb-ft for cast iron heads 28 lb-ft for aluminum

18 mm cold down to hot
New Champion	Old Champion	A--C	Auto Lite	Edison	Bowers	Globe	Blue Crown	Leonard
D-6	4 Com	82S			C18C		R-82	6
D-9	5 Com	83-S	B5	49-TS	18C	24	83 Com	6-F
D-14	6 Com	84	B7	48-TS		25	84 Com	6-A
D-16	7	85-S		45-S	18N	26	85 Com	5-HD
D-16	8 Com	86	B9	43-TS		27	86	9
D-21	C-15	87	B11	43	18H	28	87-S	5
D-23	10 Com	88-L	388	44-HS			88	8
D-89D	49	18A		42-T

The bottom plug is a special extension model Recommended torque for cast iron is 34 lb-ft 32 lb-ft for aluminum heads For 1/2" pipe plugs recommended torque in cast iron is 35 lb-ft All values are for clean lubricate threads. Over tightening a plug with a .025 gap the gap will increase to .031. Created from a 1947 heat range list and current Champion list. by Chris Klossner klossner@worldnet.att.net

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About this site - We strive to be your one-stop source for antique tractors. If you use antique tractors, collect antique tractors, or just enjoy looking at them, welcome to our site! This antique tractor resource is a collection of information that has been in the making for 10 years. We are antique tractor collectors ourselves and use them on our farm in the Pacific Northwest. We have many resources for antique tractor enthusiasts available including photos, classified ads, more than 24 antique tractor forums, show guide, values, specs and much more. Bookmark this site and come back often. Thanks for stopping by! Feel free to contact us with your comments, suggestions and ideas.