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CHAMPION 251
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CHAMPION 251 Specifications
Insulator Height
0.12 In.
Reach
0.441 In.
Thread Diameter
0.551 In.
Hex Size
0.625 In.
Ground Electrode Quantity
1
Thread Diameter
14.000 mm
Hex Size
15.880 MM
Manufacturer Heat Range
17
Classification
Champion Copper Plus Small Engine
Center Electrode Tip Material
Nickel Copper Alloy
Ground Electrode Core Material
Nickel Copper Alloy
Electrical Terminal Type
Removable Nut
Plug Type
RV17YC
Seat Type
Tapered
Resistor Type
Yes
Copper Plus
Champion Copper Plus spark plugs have been original equipment on a wide variety of engines for many years. These plugs have nickel alloy centers and ground electrodes, with reasonably good wear characteristics. In addition, the extrusion of copper into the center electrode allows for increased conductivity and heat control.
Features & Benefits:
Dependable and durable
Built to ISO and SAE standards for proven performance
Patented SAC-9 semi-conductor resistor for maximum EMI & RFI suppression
Copper core center electrode allows for accurate control of heat range for longer life
TinTac® and ULTRASEAL shell for best corrosion protection of any spark plug in the industry
This spark plug is pre-gapped, but may require minor adjustments with a Spark Plug Gap Tool / Feeler Gauge to match your engine's specifications. For proper engine performance, gaps should be within ±0.004" of OE-Recommended value.
Which CHAMPION Spark Plug Is Right For You?
Material / Series
Lifespan / Durability
Performance / Ignitability
Efficiency / Fuel Economy
Copper / Nickel Plus
★
★
Platinum Power
★★
★★★★
★
Double Platinum
★★★★
★★★★
★
Iridium
★★★
★★★★★
★★
OEM / Interchange Numbers: 26, 912C
CHAMPION Warranty Information:Iridium plugs 7 years - Double Platinum Power 5 years - Platinum Power 3 years - Copper Plus 2 years