Description
Overview:
The Genuine NGK CR7HIX Spark Plug (MPN 7544) is a high-quality iridium spark plug for motorcycles, scooters, and small petrol engines used in garden and light construction equipment. It uses a fine-wire iridium centre electrode with a durable ground electrode and a high-strength ceramic insulator to deliver a clean, consistent spark. The 10 mm thread and 12.7 mm (1/2 in) reach suit compact cylinder heads commonly found in small-capacity engines. As a resistor type plug (R), it helps suppress electrical interference that can affect ignition modules and electronics. Built by NGK for reliable starting, stable idling, and efficient combustion, it supports smoother running and improved fuel burn. This is a Genuine NGK part, sold individually, and is suitable wherever a CR7H-series iridium plug is specified.
Key Features:
- Genuine NGK Iridium IX spark plug: CR7HIX, MPN 7544, sold individually
- Fine-wire iridium centre electrode for a strong spark and long service life
- Resistor type to reduce radio-frequency interference and electrical noise
- Thread: M10 x 1.0 (10 mm), Reach: 12.7 mm (1/2 in) for compact cylinder heads
- Hex size: 16 mm (5/8 in) for easy removal with standard plug sockets
- Plug gap: 0.7 mm (approx 0.028 in); check and adjust to your engine specification
- Corrosion-resistant plated steel shell to help prevent seizing in the head
- Reliable ignition performance to aid cold starts and smooth throttle response
- Designed for durability under varied riding and operating conditions
- Straightforward fitment when replacing a plug of the same code and dimensions
Typical Applications:
Suitable for many small-capacity motorcycles and scooters, plus compact petrol engines used in generators, pumps, and garden machinery where a 10 mm thread and 12.7 mm (1/2 in) reach are specified. Ideal for routine servicing to maintain reliable starting, stable idling, and consistent combustion in everyday and light commercial use.
Also known as:
Spark igniter, ignition plug, engine plug, HT plug, iridium plug, CR7H-series plug. These terms may appear in workshop manuals and parts lists when referring to a 10 mm, 12.7 mm reach iridium spark plug with a resistor.
Product Specifications
| L&S Part No. | CR7HIX |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | NGK |
| OEM No. | 7544 |
| Unit of Sale | 1 |
| Machine Type | Engines |
| Fits Brands | NGK |
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