Champion 843EZ Spark Plug

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Rating

3.8 / 5 Overall
Champion	843EZ
Brand	Code
4.0 / 5 Materials
Copper	Iridium
Ground electrode	Center electrode
3.5 / 5 Design
Standard	Fine Wire
Ground type	Center type

Specifications

0.6mm (.024")	8
Gap	Heat range
⌀14mm	1.25mm
Thread diameter	Thread pitch
9.5mm (3/8")	19mm (3/4")
Reach	Hex size
Gasket	Solid
Seat	Terminal
1	Non-Projected
Ground count	Projection

Cross-reference and alternatives

Cross-reference (1)

Alternative spark plugs found in cross-reference docs provided by manufacturers

BM6A

Copper

2.9/ 5

.028"9.5mm, ⌀14x1.25HR 6

Deep reference (12)

A second level of cross-reference: if A=B and B=C, then A=C

XST255

Iridium-Platinum

4.2/ 5

.030"9.5mm, ⌀14x1.25HR 6

W20M-U

Copper

3.3/ 5

.028"9.5mm, ⌀14x1.25HR 20

5846

Copper

3.2/ 5

.024"9.5mm, ⌀14x1.25HR 14

SE254DPT

Copper

3.2/ 5

.024"9.5mm, ⌀14x1.25HR 3

254

Copper

2.9/ 5

.024"9.5mm, ⌀14x1.25HR 3

255

Copper

2.9/ 5

.030"9.5mm, ⌀14x1.25HR 6

WS7E

Copper

2.9/ 5

.020"9.5mm, ⌀14x1.25HR 7

843-1

Copper

2.9/ 5

.030"9.5mm, ⌀14x1.25HR 8

CJ8

Copper

2.9/ 5

.030"9.5mm, ⌀14x1.25HR 8

254DP

Copper

2.9/ 5

.024"9.5mm, ⌀14x1.25HR 3

WS7E OSN

Copper

2.9/ 5

.020"9.5mm, ⌀14x1.25HR 7

WS8E SE

Copper

2.9/ 5

.020"9.5mm, ⌀14x1.25HR 8

Bigger gap (5)

0.1..0.3 mm gap increase for better performance given your ignition system can handle it

840C

Copper

2.9/ 5

.030"9.5mm, ⌀14x1.25HR 8

843-1

Copper

2.9/ 5

.030"9.5mm, ⌀14x1.25HR 8

843ECO

Copper

2.9/ 5

.030"9.5mm, ⌀14x1.25HR 7

RCJ8

Copper

2.9/ 5

.030"9.5mm, ⌀14x1.25HR 8

CJ8

Copper

2.9/ 5

.030"9.5mm, ⌀14x1.25HR 8

One step colder (4)

Colder spark plugs with same characteristics for moderately tuned engines (75–100 hp increase)

852EZ

Copper-Iridium

-

3.8/ 5

.024"9.5mm, ⌀14x1.25HR 6

5852

Copper

3.2/ 5

.024"9.5mm, ⌀14x1.25HR 6

849C

Copper

2.9/ 5

.024"9.5mm, ⌀14x1.25HR 6

CJ6

Copper

2.9/ 5

.024"9.5mm, ⌀14x1.25HR 6