The Genuine NGK CMR6H-CS1 (Manufacturer Part Number 4794) is a compact resistor-type spark plug designed for dependable ignition in small petrol engines. Built with a durable metal shell and a high-strength ceramic insulator, it delivers a clean, consistent spark to ignite the fuel-air mixture and support easy starting and smooth running. This plug uses a 10 mm thread with a 12.7 mm (1/2″) reach and a 16 mm (5/8″) hex, making it suitable for many handheld and compact machines where space is tight. It is commonly used across garden and construction equipment such as chainsaws, brushcutters/strimmers, hedge trimmers, blowers, small generators and pumps. As a Genuine NGK part, it offers proven reliability for routine servicing or a like-for-like replacement.

Key Features:
– Genuine NGK part for consistent quality and performance
– OEM reference CMR6H-CS1; NGK MPN 4794 for straightforward identification
– Resistor design helps reduce electrical interference with tools and equipment
– Robust ceramic insulator and corrosion-resistant metal shell for long service life
– Provides a stable spark for efficient combustion and reliable cold starts
– Compact size: 10 mm 1.0 thread, 12.7 mm (1/2″) reach, 16 mm (5/8″) hefor easy fitting
– Suitable for many small 2‐stroke and 4‐stroke petrol engines in garden and site machinery
– Supports regular maintenance schedules to keep engines running smoothly
– Can be set to the engine manufacturer’s specified gap during installation
– Designed to withstand vibration and heat in demanding handheld equipment

Typical Applications:
Used as a service replacement or upgrade in small petrol engines powering chainsaws, grass trimmers/brushcutters, hedge trimmers, leaf blowers, compact generators, water pumps and similar equipment. Ideal for workshop and site maintenance where reliable ignition, easy starting and steady idle are essential. Suitable for both professional trade use and home garden machinery.

Also known as:
Ignition plug, petrol engine plug, resistor spark plug, small engine spark plug, spark igniter, ignition electrode, engine ignition plug.

Product Specifications