Description
Overview:
The NGK CR5EH-9 is a genuine spark plug (MPN 6689) designed for dependable ignition in small petrol engines used across construction and garden machinery. Built with a tough steel shell and a high-grade ceramic insulator, it delivers a clean, reliable spark to ignite the air-fuel mixture for smooth starting and steady running. This resistor-type plug helps reduce electrical interference with on-board electronics. Key dimensions are a 10 mm thread diameter and a 19 mm (3/4") reach, with an M4 terminal to suit common small-engine leads. Suitable for compact engines in equipment such as generators, water pumps, compactors, pressure washers, lawn mowers, brushcutters, and hedge trimmers, it supports consistent performance and long service life when maintained to the engine manufacturer's specifications. Genuine NGK quality ensures a precise fit and stable operation.
Key Features:
- Genuine NGK component for assured quality and compatibility (Brand: NGK, MPN: 6689)
- 10 mm thread diameter and 19 mm (3/4") reach for common small-engine cylinder heads
- M4 terminal for secure connection to standard small-engine ignition leads
- Resistor type to minimise radio-frequency interference and electrical noise
- Stable ignition for smoother starting, cleaner idle, and reliable running under load
- Durable construction with corrosion-resistant metal shell and robust ceramic insulator
- Engineered for long service life when used and gapped to the engine maker's guidance
- Factory set gap typically 0.9 mm (0.035"); check and adjust to OEM specification if required
- Suits a wide range of compact petrol engines found in garden and construction equipment
- Straightforward replacement for routine servicing of the ignition system
Typical Applications:
Ideal for small petrol engines powering lawn mowers, generators, compactors, pressure washers, water pumps, tillers, brushcutters, hedge trimmers, and other light plant. Suitable for both two-stroke and four-stroke designs where a 10 mm thread and 19 mm (3/4") reach are specified. Helps restore easy starting and consistent ignition in daily-use machines.
Also known as:
Often referred to as an ignition plug, spark igniter, engine plug, resistor plug, or small-engine spark plug. Sometimes described as a 10 mm long-reach plug or CR5EH-9 ignition component for compact petrol engines.
Product Specifications
| L&S Part No. | CR5EH-9 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | NGK |
| OEM No. | 6689 |
| Unit of Sale | 1 |
| Machine Type | Engines |
| Fits Brands | NGK |
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