NGK Spark Plug BPR5ES 7734

The NGK BPR5ES (7734) is a standard nickel spark plug frequently used in outdoor power equipment and automotive applications. It is known for its resistor design, which prevents electrical interference with other electronic components while ensuring reliable ignition.
Key Specifications
Thread Size: 14mm
Thread Reach: 19mm (3/4")
Hex Size: 13/16" (21mm)
Heat Range: 5 (NGK's "hotter" range, ideal for lower-speed operation to prevent fouling)
Gap: Factory pre-set at 0.032" (0.8mm)
Electrode: Nickel alloy with a copper core for superior heat dissipation
Terminal Type: Removable nut
Performance Features
Copper Core: Provides a wider heat range to prevent overheating at high loads while resisting carbon buildup during idling.
Trivalent Metal Plating: The shell is coated to offer excellent anti-corrosion and anti-seizing properties, ensuring it won't get stuck in the engine head.
Corrugated Ribs: Help prevent "flashover" (electrical leakage) to ensure a strong spark