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NGK 7912 Spark Plug
| Brand | NGK 7912 |
|---|---|
| Resistance | 1 |
| 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 | 18 |
| Insulator Height | 50.00 |
| Manufacturer Heat Range | 7 |
| Seat Type | Flat |
| Reach | .75 |
| Thread Diameter | 12.00 |
| Part Number | D7ea |
| Stock Number | 7912 |
| Fits | — |
OE supplier heritage. Built to original equipment standards for dependable performance.
Copper core. Helps promote consistent ignition and reliable operation.
Standard spark plug. A direct-fit ignition component for broad application coverage.
Cross-references Autolite 4164, Carlson 7912 and DENSO Auto Parts 4090 for the same application. See all 21.
NGK D7EA Standard Spark Plug
The NGK D7EA standard spark plug is built for dependable ignition performance in a wide range of domestic and import applications. With a copper core center electrode, nickel tip materials, and a 0.028 pre-gap, this plug supports consistent spark delivery for engines that call for a flat-seat, 12 mm spark plug with a 0.75 reach.
NGK’s Standard Spark Plug line focuses on OE-style construction and broad vehicle coverage. Part number 7912 reflects NGK’s long-standing role as a major OE supplier, with manufacturing experience across automotive, motorcycle, marine, and small engine applications.
Key Features
- NGK Standard Spark Plug, part number 7912
- Copper center electrode core with nickel center tip
- Nickel ground electrode with standard ground configuration
- 0.028 pre-gap size for specified applications
- Flat seat design with 12 mm thread diameter and 0.75 reach
- 1 resistance design for stable ignition performance
- 18 mm hex size for service access
Detailed Description
The NGK D7EA spark plug is engineered for engines that require a standard copper-core plug with a nickel firing end and flat-seat installation. Its 7 heat range, stud terminal, and single ground electrode configuration make it a direct-match service part for many ignition systems that rely on OE-style spark plug dimensions and materials. If you are servicing a Honda, Yamaha, or other small-engine application that specifies NGK 7912, this plug provides the correct construction details for routine maintenance and ignition restoration.
As part of NGK’s Standard Spark Plug line, the D7EA is designed around original equipment standards and broad application coverage. The part number 7912 is commonly referenced in cross-application catalogs, and this part cross-references Autolite 4164 for the same application.
What It Helps Solve
- Hard starting caused by worn or fouled spark plugs
- Misfire from weak or inconsistent spark output
- Rough idle related to degraded ignition performance
- Reduced throttle response from incorrect plug heat range or gap
- Service issues when replacing an NGK D7EA / 7912 spark plug
Installation Notes and Tips
Verify the engine calls for a 12 mm, flat-seat spark plug with a 0.75 reach before installation. Confirm the specified gap and adjust only if the application requires it. Use the correct 18 mm spark plug socket and tighten to the vehicle manufacturer’s torque specification. For fitment-based searches, this part is commonly sought for Honda and Yamaha applications that specify NGK D7EA or part number 7912.
Quality Assurance
NGK is a long-established OE supplier with extensive North American and global manufacturing and distribution support. The D7EA follows NGK’s standard spark plug construction and original equipment-focused approach for consistent service replacement.
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