Description
Overview:
The NGK CMR4A Spark Plug (5474) is a small-engine ignition component designed for dependable starting and consistent running in petrol-powered tools. Built with a durable steel shell, a high-grade ceramic insulator and a nickel-alloy centre electrode, it provides a stable spark across a wide range of operating conditions. Its resistor design helps reduce electrical interference that can affect ignition performance and nearby electronics. This plug is suitable for compact engines typically found in brushcutters, line trimmers and multi-tools, including models such as the MS-245.4 C and EBH253L. Whether you maintain equipment at home, on site or in a workshop, the CMR4A supports efficient combustion and smooth throttle response, helping engines run cleanly and reliably when serviced to the manufacturer's schedule.
Key Features:
- Reliable ignition for easier starting and stable idling in small petrol engines
- Resistor type to suppress electrical interference for consistent performance
- Robust construction with corrosion-resistant metal shell and quality ceramic insulator
- Precision NGK heat rating and electrode design to suit specified engines
- Helps maintain fuel efficiency and throttle response when the correct gap is set
- Designed for straightforward fitting with a standard spark plug spanner
- Supports regular maintenance cycles and consistent performance over its service life
- Sold individually to match single-plug service requirements
- Widely used across garden and light construction equipment in the listed models
Typical Applications:
Suitable for routine servicing of brushcutters, line trimmers, hedge trimmers and similar compact machines used in landscaping, grounds care and light construction. Ideal for homeowners, contractors and hire fleets looking to restore reliable starting, smooth running and strong mid-range power in compatible small engines.
Also known as:
Igniter plug, resistor spark plug, small‐engine ignition plug, engine ignition plug, NGK CMR4A 5474 plug. These terms are commonly used when referring to the same type of spark plug for compact petrol engines.
Fits Models:
EBH253L, EBH341U, ER2550LH, MS-245.4 C, MS-245.4 U, MS-245.4C, MS-245.4U, MS-246.4 C, MS-246.4C, MS-335.4 C, MS-335.4C
Alternate Part Numbers:
5474
Product Specifications
| L&S Part No. | CMR4A |
|---|---|
| Manufacturer | NGK |
| OEM No. | 5474 |
| Unit of Sale | 1 |
| Applications | EBH253L, EBH341U, ER2550LH, MS-245.4 C, MS-245.4 U, MS-245.4C, MS-245.4U, MS-246.4 C, MS-246.4C, MS-335.4 C, MS-335.4C |
| Machine Type | Brushcutters |
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