×
Description
6630 – Champion UR4 Copper Spark Plug (OEM Replacement Spark Plug)
The Champion UR4 Spark Plug (Part #6630) is a premium copper-core spark plug engineered to deliver dependable ignition performance for a wide range of automotive, industrial, and small engine applications. Featuring a copper core, nickel center electrode, and an integrated 5,000-ohm resistor, the UR4 provides reliable cold starts, smooth engine operation, improved combustion efficiency, and long service life.
Manufactured to Champion's high-quality standards, the UR4 is designed to resist fouling and corrosion while maintaining consistent spark performance under demanding operating conditions.
Product Details
-
Part Number: 6630
-
Brand: Champion
-
Model: UR4
-
Part Type: Spark Plug
-
Metallurgy: Copper Core
-
Center Electrode Tip: Nickel
-
Heat Range: 4
-
Thread Size: M14 x 1.25
-
Thread Reach: 11.2 mm (0.460")
-
Seat Type: Tapered
-
Hex Size: 16 mm (5/8")
-
Preset Gap: 1.0 mm (0.040")
-
Resistor Value: Approximately 5,000 Ohms
-
OEM Replacement Quality
Specifications
-
Thread Size: M14 x 1.25
-
Thread Reach: 11.2 mm (0.460")
-
Hex Size: 16 mm (5/8")
-
Seat: Tapered
-
Heat Range: 4
-
Center Electrode: Nickel
-
Core Material: Copper
-
Preset Gap: 0.040" (1.0 mm)
-
Resistor: 5 kΩ
-
Insulator Height: 55.5 mm (2.190")
Key Features
-
Genuine Champion copper-core spark plug
-
Nickel center electrode for dependable ignition
-
Copper core improves heat dissipation
-
Built-in resistor helps reduce electrical interference
-
Excellent resistance to fouling and corrosion
-
Delivers reliable cold starting and smooth engine performance
-
OEM-quality construction
Function
The Champion UR4 Spark Plug ignites the air-fuel mixture inside the combustion chamber, producing consistent combustion for reliable starting, smooth engine operation, improved fuel efficiency, and dependable overall performance.
Compatible Equipment
The Champion UR4 is suitable for a variety of engines and equipment that specify a Champion UR4 spark plug or equivalent.
Always verify your engine manufacturer's recommended spark plug number and specifications before ordering.
Who Is This For?
-
Homeowners
-
Automotive technicians
-
Small engine repair professionals
-
Commercial equipment operators
-
DIY mechanics
Recommended Applications
Ideal for routine tune-ups and scheduled maintenance to restore ignition performance, improve engine efficiency, and maintain reliable operation.
Pros
-
Genuine Champion quality
-
Copper-core design for efficient heat transfer
-
Reliable ignition performance
-
Built-in resistor reduces electrical interference
-
Excellent durability and fouling resistance
-
Direct OEM replacement
Cons
-
Fits only engines specifying the Champion UR4 or equivalent
-
Spark plug gap should always be verified according to the engine manufacturer's specifications before installation
Comparison – Champion UR4 vs Standard Economy Spark Plugs
Champion UR4
-
Copper-core construction
-
Nickel center electrode
-
Consistent spark output
-
Excellent heat dissipation
-
Long-lasting OEM-quality performance
Generic Economy Spark Plugs
-
Lower-quality materials
-
Less consistent ignition performance
-
Shorter service life
-
Increased susceptibility to fouling
Why Buy from Barry's Power Equipment?
Barry's Power Equipment supplies genuine Champion ignition components trusted by professional technicians and equipment owners.
-
High-quality OEM replacement parts
-
Fast nationwide shipping
-
Competitive pricing
-
Expert parts support
-
Extensive inventory for Champion and other leading outdoor power equipment and engine brands

