Components of a typical, four stroke cycle, DOHC piston engine. (E) Exhaust camshaft, (I) Intake camshaft, (S) Spark plug, (V) Valves, (P) Piston, (R) Connecting rod, (C) Crankshaft, (W) Water jacket for coolant flow.

Diagram of single-ground spark plug (the bottom hook "side electrode" is the single ground electrode).

Spark plug gapping: The center electrode (dark rod) is a cylindrical rod, and the top ground electrode (a hook) has square edges. When regapping, the hook is raised or lowered to adjust the gap, often .035-.050.

Gap gauge: A disk with sloping edge; the edge is thicker going counter-clockwise, and a spark plug will be hooked along the edge to check the gap.

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		CHAMPION Spark Plugs sign Camaro NOS Chevelle 70 69 68 US $9.95			Vintage Hastings 10-170 Spark Plugs Qty 8 ea. NOS US $19.95

		Vintage Blue Crown T8 Spark Plugs Qty. 8 es. NOS US $19.95			12 VINTAGE USED SPARK PLUGS US RUBBER,BOSCH,AUTO LITE US $5.95

		2 VINTAGE NOS CHAMPION X FORD MODEL T SPARK PLUGS US $12.95			HARLEY KNUCKLEHEAD,PANHEAD SPARK PLUG (NOS) IN BOX RARE US $99.95

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		AC Antique Spark plug Great Condition US $9.00			STIT Antique Spark plug US $9.00

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		* 1960's * HUGE * CHAMPION SPARK PLUG store advertising US $139.99			Defiance 46 Antique Spark Plug US $9.00

		Unmarked Antique Spark Plug US $9.00			AC Titan Antique Spark Plug US $9.00

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		Champion TOLEDO Antique Spark Plug US $9.00			Unmarked Antique Spark Plug (Great Condition) US $9.00

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		VINTAGE A C SPARK PLUGS CORALOX TIN SIGN NR US $9.00			Antique York C.W.S. New York Spark Plug US $9.95

		Antique Champion 1/2" Spark Plug w Box US $9.95			Antique Champion Spark Plug US $9.95

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		Rare Antique 1898 Pat Rex Motorcycle Spark Plug w Box US $9.95			Antique Mosler 1/2" Spit Fire Spark Plug w Box US $9.95

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		Old Vintage Car SA FIRE INJECTOR SPARK PLUGS + Box NR US $49.99			2Pairs MPX Plugs New Plugs Great for Wing Joining US $2.96

		LQQK VINTAGE + SEIBERLING + Spark Plug NOS US $6.95			LQQK VINTAGE + WESTRIC + Spark Plug NOS US $10.95

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		LQQK VINTAGE + AUTO-KING + Spark Plug NOS US $9.95			1920's Champion Spark Plug Tester Cleaner US $249.99

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		RARE 1920's -1930's AC SPARK PLUG CLEANING MACHINE US $279.00			Three Vintage spark plugs US $1.99

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		2~ Vintage/Old CHAMPION 34 Gas Engine Spark Plugs~NOS US $25.00			Champion Dealer Spark Plug Plastic sign Thermometer US $22.50

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		Ceramic AC Spark plug Lamp with shade US $59.99			AC Spark Plugs Full Case 45XLS/ NOS US $125.00

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		Vintage Champion Spark Plugs (2) US $10.00			Vintage Polonium Firestone Spark Plugs (2) US $10.00

		SIX EARLY SPARK PLUG CONTAINERS US $20.50			OUAKA TOP PRIMER AND BREATHER SPARK PLUG US $19.99

		FOUR EARLY SPARK PLUGS US $19.99			EARLY PRESTED SPARK PLUG US $24.50

		EARLY CHAMPION POSTER MODEL A MODEL T US $19.99			1948 CHAMPION SPARK PLUG ORIGINAL ADVERTISEMENT NICE US $4.99

		COPY of original vintage EDISON PEP spark plug POSTER US $9.99			Vintage “PLUG n BULB” spark plug CADDY plastic box US $6.99

		Vintage CHAMPION LABORATORY THERMOCOUPLE spark plug US $9.99			Vintage 14mm BECO REBUILT SPARK PLUG (written on porc.) US $9.99

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		Vintage 18mm EOLE aircraft/motorcycle spark plug US $10.49			AC Spark Plugs sign for Camaro Gto Chevelle 69 67 70 71 US $14.50

		1920's NOS Stromberg 18-F Spark Plug in Original Box US $9.99			Champion 1 Com Spark Plug US $4.99

		VINTAGE AC DELCO SPARK PLUG GAP GAUGE ACDELCO KEYRING US $1.99

	Click to see more Spark Plugs items Prices current as of last update, 09/08/10 1:04am.

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