Description
Overview:
The BR4LM Spark Plug by NGK (MPN 4133) is a genuine replacement ignition component for small petrol engines used in garden and light construction equipment. Built with a corrosion-resistant steel shell and a durable ceramic insulator, it delivers a reliable spark to ignite the air-fuel mixture for smooth starting and consistent running. This resistor-type plug helps suppress electrical interference for stable operation with modern ignition systems. Suitable for a wide range of handheld and walk-behind machines, including lawn mowers, chainsaws, brushcutters, generators and compactors, it supports routine servicing and maintenance. Identified by the OEM code BR4LM, this Genuine NGK part offers dependable fit and performance where the BR4LM specification is required by the engine manufacturer.
Key Features:
- Genuine NGK part for assured quality and compatibility
- Manufacturer Part Number (MPN): 4133; OEM code: BR4LM for easy identification
- Consistent ignition for reliable cold starts and smooth running
- Resistor design helps minimise electrical and radio interference
- Robust steel shell and high-strength ceramic insulator for durability
- Suitable for many small 2-stroke and 4-stroke engines in garden and site equipment
- Straightforward to fit as part of routine servicing
- Designed for long service life when used and maintained to engine specifications
Typical Applications:
Ideal for petrol lawn mowers, chainsaws, brushcutters, hedge trimmers, generators, plate compactors, tillers, small pumps and pressure washers. Use as a like-for-like replacement where BR4LM is specified to help restore dependable starting, steady idle and efficient combustion in both domestic and professional small-engine equipment.
Also known as:
Resistor ignition plug, small-engine ignition plug, engine spark plug, spark igniter, NGK 4133 plug, BR4LM replacement plug, small equipment spark plug, petrol engine plug.
Product Specifications
| L&S Part No. | BR4LM |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | NGK |
| OEM No. | 4133 |
| Unit of Sale | 1 |
| Machine Type | Engines |


