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NGK 4549 Spark Plug
| Brand | NGK 4549 |
|---|---|
| Resistance | 5000 |
| Ground Electrode Tip Design | Standard |
| Ground Configuration | Standard |
| Ground Electrode Core Material | Nickel |
| Electrical Terminal Type | Stud |
| Center Electrode Core Material | Copper |
| Center Electrode Tip Material | Nickel |
| Pre-Gap Size | .028 |
| Ground Electrode Quantity | 1 |
| Hex Size | 5/8 |
| Insulator Height | 50.00 |
| Manufacturer Heat Range | 7 |
| Seat Type | Flat |
| Reach | .5 |
| Thread Diameter | 10.00 |
| Part Number | Cr7hsa |
| Stock Number | 4549 |
| Fits | — |
OE legacy. Built to original equipment standards for dependable performance.
Copper core. Helps promote consistent ignition and reliable operation.
Standard design. Spark plug with nickel electrodes and a flat seat.
Cross-references Airtex Fuel Pumps 4008, Champion Spark Plug 808 and NGK 4549 for the same application. See all 21.
Will it fit your vehicle?
Free return shipping if it doesn't fit.
NGK CR7HSA Spark Plug
NGK 4549 is a standard spark plug built for reliable ignition performance in small-engine and powersports applications. This NGK Standard Spark Plug uses a copper center electrode core, nickel center and ground electrode tips, and a 5,000 ohm resistor to help maintain stable spark delivery.
Compatible With Honda and Yamaha applications that call for NGK CR7HSA, this plug is specified with a 10 mm thread diameter, 5/8 hex, .500 reach, flat seat, and .028 pre-gap. The NGK 4549 part number is also listed as CR7HSA for easy cross-reference.
Key Features
- NGK Standard Spark Plug, part number 4549
- CR7HSA replacement reference
- 5000 ohm resistor for ignition circuit control
- Copper core center electrode with nickel tip
- Nickel ground electrode with standard configuration
- .028 pre-gap, 10 mm thread diameter, 5/8 hex
- Flat seat and .500 reach
Product Details
NGK builds this spark plug to OE-style specifications for consistent ignition performance and durability. The standard electrode design, nickel construction, and stud terminal support dependable spark transfer in engines that require the CR7HSA heat range 7 configuration. For buyers searching NGK 4549, CR7HSA spark plug, or Honda/Yamaha spark plug replacement, this part matches the listed dimensions and electrical specifications.
This part cross-references Champion Spark Plug 808 for the same application.
Common Issues It Can Help Address
- Hard starting caused by worn spark plug electrodes
- Misfire from excessive plug gap or degraded ignition transfer
- Rough idle from inconsistent spark output
- Reduced throttle response from an aging plug
- Ignition performance loss in engines calling for CR7HSA
Installation Notes
Verify the engine calls for NGK CR7HSA before installation. Confirm thread diameter, reach, seat type, and pre-gap against the service specification for your Honda, Yamaha, or other listed application. Check the gap during service and install to the manufacturer’s torque specification.
Quality Assurance
NGK is a major OE spark plug supplier with more than 80 years of automotive experience and broad coverage across automotive, motorcycle, marine, and small-engine applications. The 4549 spark plug is manufactured to support original-equipment standards for durability and operational performance.
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|---|---|---|---|---|
| No rows match your filter. | ||||