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NGK 6703 Spark Plug
| Brand | NGK 6703 |
|---|---|
| Resistance | 10000 |
| 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 | .028 |
| Ground Electrode Quantity | 1 |
| Hex Size | 3/4 |
| Insulator Height | 40.00 |
| Manufacturer Heat Range | 7 |
| Seat Type | Flat |
| Reach | .375 |
| Thread Diameter | 14.00 |
| Part Number | Bpmr7a solid |
| Stock Number | 6703 |
| Fits | — |
OE supplier heritage. Backed by NGK’s long-running original equipment manufacturing experience.
Copper core design. Helps promote consistent ignition performance and reliable spark delivery.
Standard spark plug. A direct-fit replacement for a wide range of ignition applications.
Cross-references AP Exhaust 7545, AP Exhaust 7547 and Bosch 6703 for the same application. See all 15.
NGK BPMR7A SOLID Spark Plug Overview
The NGK 6703 spark plug is a standard replacement ignition component built for dependable combustion performance in small-engine and powersports applications. As part of NGK’s Standard Spark Plug line, it uses a copper core center electrode, nickel tip materials, and a 10,000 ohm resistor to support stable ignition and reduced electrical interference.
NGK’s Standard Spark Plug line focuses on OE-style construction and consistent operation across a wide range of engines. The BPMR7A SOLID configuration is designed for applications that call for a flat seat, 14 mm thread diameter, .375 inch reach, and a pre-gap of .028.
Key Features
- NGK part number 6703, also identified as BPMR7A SOLID
- Standard spark plug design for routine ignition service
- Copper center electrode core for efficient heat transfer
- Nickel center and ground electrode tip materials
- 10,000 ohm resistor helps control electrical noise
- Flat seat design with 14 mm thread diameter and .375 inch reach
- Pre-gapped to .028 for specified applications
- Single ground electrode with standard configuration
Detailed Description
NGK 6703 is a standard spark plug engineered for engines that specify the BPMR7A SOLID configuration. Its copper core and nickel electrode construction support consistent spark delivery, while the resistor design helps reduce interference in ignition systems and electronic components. The 3/4 inch hex size and flat seat design make it a direct-service style plug for the applications that call for these dimensions.
This part cross-references Bosch 6703 for the same application. For buyers searching by vehicle terms, NGK 6703 is commonly referenced in small-engine and powersports maintenance searches, including Honda and Yamaha engine service queries where the BPMR7A SOLID specification is required.
What It Helps Address
- Hard starting caused by worn or fouled spark plugs
- Rough idle from weak or inconsistent spark output
- Misfire conditions related to degraded ignition performance
- Excessive electrical noise in resistor-equipped ignition systems
- Loss of throttle response from aged plug electrodes
Installation Notes and Tips
Verify the engine calls for BPMR7A SOLID, NGK 6703, or the same thread, reach, seat, and heat range before installation. Check the plug gap against the engine specification, confirm the terminal style matches the ignition lead or cap, and inspect the threads and sealing surface during service. For vehicle-specific searches, confirm the exact application on the Honda or Yamaha model before ordering.
Quality Assurance
NGK is a long-established OE supplier with broad coverage across automotive, motorcycle, marine, and small-engine applications. The brand’s manufacturing and distribution network supports consistent product standards for replacement ignition parts, including the NGK 6703 spark plug.
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