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Champion RC9YCN4 Spark Plug

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Rating
2.9 / 5
Overall
Champion RC9YCN4
Brand Code
3.0 / 5
Materials
Copper Copper
Ground electrode Center electrode
2.8 / 5
Design
Standard Standard
Ground type Center type
Specifications
1mm (.039") 9
Gap Heat range
⌀14mm 1.25mm
Thread diameter Thread pitch
19mm (3/4") 16mm (5/8")
Reach Hex size
Gasket Solid
Seat Terminal
1 Non-Projected
Ground count Projection

Cross-reference and alternatives

How we find alternative spark plugs How we rate spark plugs

Cross-reference (4)

Alternative spark plugs found in cross-reference docs provided by manufacturers
Iridium-Platinum
4.2 / 5
.043" 19mm, ⌀14x1.25 HR 20
Copper
3.3 / 5
.043" 19mm, ⌀14x1.25 HR 20
Copper
3.1 / 5
.043" 19mm, ⌀14x1.25 HR 6
Copper
-
2.9 / 5
.045" 19mm, ⌀14x1.25 HR 2

Deep reference (92)

A second level of cross-reference: if A=B and B=C, then A=C
Iridium-Platinum
4.3 / 5
.043" 19mm, ⌀14x1.25 HR 6
Iridium-Platinum
4.2 / 5
.039" 19mm, ⌀14x1.25 HR 6
Iridium-Platinum
4.2 / 5
.043" 19mm, ⌀14x1.25 HR 6
Platinum
3.8 / 5
.028" 19mm, ⌀14x1.25 HR 6
Platinum
3.8 / 5
.028" 19mm, ⌀14x1.25 HR 6
Platinum
3.8 / 5
.039" 19mm, ⌀14x1.25 HR 7
Platinum
3.8 / 5
.031" 19mm, ⌀14x1.25 HR 7
Copper-Iridium
3.8 / 5
.031" 19mm, ⌀14x1.25 HR 6
Platinum
3.8 / 5
.028" 19mm, ⌀14x1.25 HR 6
Platinum
3.8 / 5
.043" 19mm, ⌀14x1.25 HR 6
Copper-Iridium
3.8 / 5
.043" 19mm, ⌀14x1.25 HR 6
Copper-Platinum
3.7 / 5
.024" 19mm, ⌀14x1.25 HR 5
Platinum
3.6 / 5
.041" 19mm, ⌀14x1.25 HR 8
Copper-Platinum
3.5 / 5
.063" 19mm, ⌀14x1.25 HR 7
Copper-Platinum
3.5 / 5
.063" 19mm, ⌀14x1.25 HR 7
Copper-Platinum
3.4 / 5
.020" 19mm, ⌀14x1.25 HR 6
Copper-Silver
3.3 / 5
.028" 19mm, ⌀14x1.25 HR 6
Copper
3.3 / 5
.035" 19mm, ⌀14x1.25 HR 6
Copper
3.3 / 5
.035" 19mm, ⌀14x1.25 HR 6
Copper
3.3 / 5
.031" 19mm, ⌀14x1.25 HR 5
Copper
3.3 / 5
.035" 19mm, ⌀14x1.25 HR 6
Copper
3.3 / 5
.035" 19mm, ⌀14x1.25 HR 6
Copper
3.3 / 5
.026" 19mm, ⌀14x1.25 HR 6
Copper
3.3 / 5
.031" 19mm, ⌀14x1.25 HR 6
Copper
3.3 / 5
.031" 19mm, ⌀14x1.25 HR 6
Copper
3.3 / 5
.020" 19mm, ⌀14x1.25 HR 89
Copper
3.3 / 5
.043" 19mm, ⌀14x1.25 HR 20
Copper-Platinum
3.3 / 5
.043" 19mm, ⌀14x1.25 HR 7
Copper
3.3 / 5
.031" 19mm, ⌀14x1.25 HR 20
Copper
3.3 / 5
.035" 19mm, ⌀14x1.25 HR 6
Copper
3.2 / 5
.063" 19mm, ⌀14x1.25 HR 6
Copper
3.2 / 5
.063" 19mm, ⌀14x1.25 HR 7
Copper
3.2 / 5
.063" 19mm, ⌀14x1.25 HR 8
Copper
3.2 / 5
.039" 19mm, ⌀14x1.25 HR 8
Copper
3.1 / 5
.028" 19mm, ⌀14x1.25 HR 5
Copper
3.1 / 5
.031" 19mm, ⌀14x1.25 HR 6
Copper
3.1 / 5
.024" 19mm, ⌀14x1.25 HR 6
Copper
3.1 / 5
.020" 19mm, ⌀14x1.25 HR 6
Copper
3.1 / 5
.020" 19mm, ⌀14x1.25 HR 6
Copper
3.1 / 5
.020" 19mm, ⌀14x1.25 HR 6
Copper
3.1 / 5
.035" 19mm, ⌀14x1.25 HR 6
Copper
3.1 / 5
.031" 19mm, ⌀14x1.25 HR 6
Copper
3.1 / 5
.039" 19mm, ⌀14x1.25 HR 5
Copper
3.1 / 5
.039" 19mm, ⌀14x1.25 HR 5
Copper
3.1 / 5
.016" 25mm, ⌀7/8"x HR 77
Copper
3.1 / 5
.043" 19mm, ⌀14x1.25 HR 6
Copper
3.1 / 5
.043" 19mm, ⌀14x1.25 HR 5
Copper
3.1 / 5
.035" 19mm, ⌀14x1.25 HR 6
Copper
3.1 / 5
.043" 19mm, ⌀14x1.25 HR 7
Copper
3.1 / 5
.043" 19mm, ⌀14x1.25 HR 5
Copper
3.1 / 5
.043" 19mm, ⌀14x1.25 HR 5
Copper
3.1 / 5
.043" 19mm, ⌀14x1.25 HR 6
Copper
3.1 / 5
.043" 19mm, ⌀14x1.25 HR 6
Copper
3.1 / 5
.035" 19mm, ⌀14x1.25 HR 5
Copper
3.1 / 5
.035" 19mm, ⌀14x1.25 HR 6
Copper
3.1 / 5
.043" 19mm, ⌀14x1.25 HR 6
Copper
3.1 / 5
.043" 19mm, ⌀14x1.25 HR 6
Copper
-
2.9 / 5
.028" 19mm, ⌀14x1.25 HR 7
Copper
-
2.9 / 5
.043" 19mm, ⌀14x1.25 HR 6
Copper
-
2.9 / 5
.035" 19mm, ⌀14x1.25 HR 7
Copper
-
2.9 / 5
.035" 19mm, ⌀14x1.25 HR 6
Copper
-
2.9 / 5
.035" 19mm, ⌀14x1.25 HR 6
Copper
-
2.9 / 5
.045" 19mm, ⌀14x1.25 HR 3
Copper
-
2.9 / 5
.039" 19mm, ⌀14x1.25 HR 9
Copper
-
2.9 / 5
.030" 19mm, ⌀14x1.25 HR 8
Copper
-
2.9 / 5
.039" 19mm, ⌀14x1.25 HR 8
Copper
-
2.9 / 5
.039" 19mm, ⌀14x1.25 HR 9
Copper
-
2.9 / 5
.035" 19mm, ⌀14x1.25 HR 9
Copper
-
2.9 / 5
.035" 19mm, ⌀14x1.25 HR 9
Copper
-
2.9 / 5
.039" 19mm, ⌀14x1.25 HR 9
Copper
-
2.9 / 5
.043" 19mm, ⌀14x1.25 HR 6
Copper
-
2.9 / 5
.039" 19mm, ⌀14x1.25 HR 8
Copper
-
2.9 / 5
.039" 19mm, ⌀14x1.25 HR 9
Copper
-
2.9 / 5
.043" 19mm, ⌀14x1.25 HR 6
Copper
-
2.9 / 5
.039" 19mm, ⌀14x1.25 HR 9
Copper
-
2.9 / 5
.039" 19mm, ⌀14x1.25 HR 8
Copper
-
2.9 / 5
.039" 19mm, ⌀14x1.25 HR 9
Copper
-
2.9 / 5
.049" 19mm, ⌀14x1.25 HR 9
Copper
-
2.9 / 5
.045" 19mm, ⌀14x1.25 HR 2
Copper
-
2.9 / 5
.045" 19mm, ⌀14x1.25 HR 2
Copper
-
2.9 / 5
.043" 19mm, ⌀14x1.25 HR 7
Copper
-
2.9 / 5
.043" 19mm, ⌀14x1.25 HR 7
Copper
-
2.9 / 5
.043" 19mm, ⌀14x1.25 HR 6
Copper
-
2.9 / 5
.039" 19mm, ⌀14x1.25 HR 10
Copper
-
2.9 / 5
.043" 19mm, ⌀14x1.25 HR 20
Copper
-
2.9 / 5
.031" 19mm, ⌀14x1.25 HR 5
Copper
-
2.9 / 5
.035" 19mm, ⌀14x1.25 HR 6
Copper
-
2.9 / 5
.043" 19mm, ⌀14x1.25 HR 6
Copper
-
2.9 / 5
.035" 19mm, ⌀14x1.25 HR 5
Copper
-
2.9 / 5
.043" 19mm, ⌀14x1.25 HR 5
Copper
-
2.9 / 5
.035" 19mm, ⌀14x1.25 HR 6
Copper
-
2.9 / 5
.043" 19mm, ⌀14x1.25 HR 6

Same specs (11)

Products that have identical characteristics that impact interchangability
Iridium-Platinum
4.2 / 5
.039" 19mm, ⌀14x1.25 HR 10
Platinum
3.8 / 5
.039" 19mm, ⌀14x1.25 HR 6
Platinum
3.8 / 5
.039" 19mm, ⌀14x1.25 HR 7
Platinum
3.8 / 5
.039" 19mm, ⌀14x1.25 HR 10
Platinum
3.7 / 5
.039" 19mm, ⌀14x1.25 HR 10
Copper
-
2.9 / 5
.039" 19mm, ⌀14x1.25 HR 10
Copper
-
2.9 / 5
.039" 19mm, ⌀14x1.25 HR 10
Copper
-
2.9 / 5
.039" 19mm, ⌀14x1.25 HR 9
Copper
-
2.9 / 5
.039" 19mm, ⌀14x1.25 HR 9
Copper
-
2.9 / 5
.039" 19mm, ⌀14x1.25 HR 9
Copper
-
2.9 / 5
.039" 19mm, ⌀14x1.25 HR 10

Bigger gap (8)

0.1..0.3 mm gap increase for better performance given your ignition system can handle it
Iridium-Platinum
4.2 / 5
.049" 19mm, ⌀14x1.25 HR 10
Iridium-Platinum
4.2 / 5
.049" 19mm, ⌀14x1.25 HR 10
Copper-Platinum
3.5 / 5
.043" 19mm, ⌀14x1.25 HR 7
Copper-Platinum
3.5 / 5
.045" 19mm, ⌀14x1.25 HR 10
Copper-Platinum
3.3 / 5
.043" 19mm, ⌀14x1.25 HR 7
Copper
-
2.9 / 5
.043" 19mm, ⌀14x1.25 HR 6
Copper
-
2.9 / 5
.043" 19mm, ⌀14x1.25 HR 7
Copper
-
2.9 / 5
.049" 19mm, ⌀14x1.25 HR 9

One step colder (5)

Colder spark plugs with same characteristics for moderately tuned engines (75–100 hp increase)
Iridium-Platinum
4.2 / 5
.039" 19mm, ⌀14x1.25 HR 8
Platinum
3.8 / 5
.039" 19mm, ⌀14x1.25 HR 8
Copper-Platinum
3.5 / 5
.039" 19mm, ⌀14x1.25 HR 7
Copper-Platinum
3.5 / 5
.039" 19mm, ⌀14x1.25 HR 7
Copper
-
2.9 / 5
.039" 19mm, ⌀14x1.25 HR 8

Two steps colder (1)

Two steps colder spark plugs with same characteristics for heavily modified engines (150-200 hp increase)
Iridium-Platinum
4.2 / 5
.039" 19mm, ⌀14x1.25 HR 6