Description
Overview:
The Genuine NGK BPR5ES-11 Spark Plug (MPN 4424) is a standard nickel-resistor plug for petrol engines used in construction and garden machinery. Built with a copper-core nickel alloy centre electrode, a durable steel shell, and a high-grade ceramic insulator, it delivers stable ignition and dependable performance. The -11 suffix denotes a factory set gap of 1.1 mm (0.044"). Common fitment details include M14 x 1.25 thread, 19 mm reach (3/4"), and a 20.8 mm hex (13/16") for straightforward removal and refitting. Suitable for many Honda engines, including GX640 and H4518, and widely used on generators and compact equipment, it helps maintain smooth running, clean combustion, and reliable starting. Sold individually, ideal for routine servicing or single-cylinder replacements.
Key Features:
- Genuine NGK quality for consistent spark and long service life
- Resistor design helps reduce electrical interference with engine electronics
- Copper core and nickel alloy electrode for effective heat transfer and durability
- Factory set gap 1.1 mm (0.044") to suit many small-engine requirements (check your manual)
- Standard fit: M14 x 1.25 thread and 19 mm (3/4") reach for wide compatibility
- Easy to install with a 20.8 mm hex (13/16") plug socket
- Reliable ignition under varied loads and temperatures, aiding cold starts
- Helps maintain fuel efficiency and smooth idling by ensuring clean, consistent combustion
- Robust gasket seat for a secure seal and reduced risk of blow-by
- Suitable for regular service intervals; sold individually for convenient replacement
Typical Applications:
Used in petrol-powered equipment such as generators, plate compactors, water pumps, pressure washers, ride-on and walk-behind mowers, and general site machinery. A good choice for professional trades, hire fleets, and home users maintaining Honda-powered units and similar engines where this specification is required.
Also known as:
Spark plug, ignition plug, engine plug, spark igniter, resistor spark plug, petrol engine plug, small-engine spark plug, NGK type BPR5ES-11 plug.
Fits Models:
EZ4500, G 2.5A/B, G 4.5A/B, G2.5A/B, G25AB, G4.5A/B, G45AB, GS 5.5A/B, GS 6.5A/B, GS5.5A/B, GS55AB, GS6.5A/B, GS65AB, GX640, H4518
Product Specifications
| L&S Part No. | BPR5ES-11 |
|---|---|
| Manufacturer | NGK |
| OEM No. | 4424 |
| Unit of Sale | 1 |
| Applications | EZ4500, G 2.5A/B, G 4.5A/B, G2.5A/B, G25AB, G4.5A/B, G45AB, GS 5.5A/B, GS 6.5A/B, GS5.5A/B, GS55AB, GS6.5A/B, GS65AB, GX640, H4518 |
| Machine Type | Engines |
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