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NGK 2305 Spark Plug
| Brand | NGK 2305 |
|---|---|
| Resistance | 5000 |
| Ground Electrode Tip Design | Standard |
| Ground Configuration | Standard |
| Ground Electrode Core Material | Nickel |
| Electrical Terminal Type | Non-removable nut |
| Center Electrode Core Material | Copper |
| Center Electrode Tip Material | Nickel |
| Pre-Gap Size | .032 |
| Ground Electrode Quantity | 2 |
| Hex Size | 5/8 |
| Insulator Height | 50.50 |
| Manufacturer Heat Range | 9 |
| Seat Type | Flat |
| Reach | .75 |
| Thread Diameter | 10.00 |
| Part Number | Cr9ekb |
| Stock Number | 2305 |
| Fits | — |
OE supplier heritage. Built by NGK, a long-time original equipment spark plug manufacturer.
Copper core. Helps promote consistent ignition performance.
Standard spark plug. A direct-fit replacement for everyday ignition service.
Cross-references Anchor 2305, 12 12 7 710 636 and 94702-00403 for the same application. See all 5.
NGK CR9EKB Spark Plug for Reliable Ignition
The NGK 2305 spark plug is a standard replacement ignition component built around a copper center electrode, nickel tip materials, and a 5,000 ohm resistor for stable spark delivery. It is a flat-seat plug with a 10 mm thread diameter, 0.75 in. reach, 5/8 in. hex, and a .032 pre-gap size for applications that call for this specification.
NGK’s Standard Spark Plug line reflects the company’s long OE supply background and broad coverage across domestic and import vehicles, motorcycles, marine engines, and small engines. For buyers searching for an NGK CR9EKB spark plug or NGK 2305 replacement, this part is built to match the listed OE-style dimensions and electrical characteristics.
Key Features
- Part number 2305, NGK CR9EKB
- Standard spark plug design with nickel ground and center electrode tip materials
- Copper center electrode core for consistent conductivity
- 5,000 ohm resistor for ignition noise suppression
- Flat seat, 10 mm thread diameter, .75 in. reach
- 5/8 in. hex size and non-removable nut terminal
- Manufacturer heat range 9 with .032 pre-gap size
- Two ground electrodes for the specified application
Detailed Description
NGK 2305 is a standard spark plug engineered to meet the dimensional and electrical requirements of specific ignition systems. The CR9EKB configuration uses a copper core center electrode with nickel tip materials and a nickel ground electrode core, helping maintain dependable spark transfer in the applications that call for this plug. If you are replacing an NGK CR9EKB spark plug in a motorcycle or other engine platform that specifies this exact design, the part number 2305 provides the correct reference point for ordering.
This part cross-references Anchor 2305 for the same application.
What It Helps Address
- Hard starting caused by worn or fouled spark plugs
- Misfire conditions from weak or inconsistent spark output
- Rough idle related to ignition wear
- Reduced throttle response from degraded plug performance
- Ignition noise concerns in systems that require a resistor plug
Installation Notes and Tips
Verify the plug code, thread diameter, reach, seat type, and heat range against the service specification before installation. Confirm the gap setting matches the engine requirement, and inspect the ignition coil, plug wire, or boot condition at the same time. For vehicle-specific searches such as NGK 2305 for Honda Civic or NGK CR9EKB for Honda Civic, always match the exact engine and model-year specification before ordering.
Quality Assurance
NGK is a long-standing OE supplier with extensive North American and global manufacturing and distribution support. The brand’s Standard Spark Plug line is backed by its automotive engineering experience and focus on original-equipment standards for durability and operational performance.
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