NGK CMR5H Spark Plug Box 10

The NGK CMR5H is a high-quality, resistor-type spark plug featuring a copper core for efficient heat dissipation, corrosion resistance, and a projected tip for reliable ignition. It is widely used in small engines, motorcycles, scooters, and compact 4-stroke equipment. It has an M10 x 1.0 thread, 12.7mm reach, and a 16mm (5/8") hex size.

Key Features & Specifications:

• Part Number: CMR5H
• Fits: Honda GX25, GX35 engines & HHB25 blower
• Thread Diameter: 10mm
• Thread Reach: 12.7mm (1/2")
• Hex Size: 16mm (5/8")
• Tip Material: Nickel Alloy
• Core Material: Copper
• Resistor: Yes (5 kOhm)
• Gap: 0.6mm - 0.7mm (0.024" - 0.028")

Benefits:

• Corrosion Resistance: Trivalent plating protects against corrosion and seizing in aluminium cylinder heads.
• Improved Performance: Copper core and nickel alloy electrodes provide effective heat transfer and long service life.
• Consistent Spark: Resistor design suppresses electrical interference for reliable ignition and smooth engine operation.

DELIVERY OPTIONS (UK mainland only)

Next Day Delivery*
£11.95 or FREE for orders over £100
Orders placed before 4pm Monday to Friday will be delivered on the next business day.
Orders placed after 4pm on Friday will be delivered the following Tuesday.
*Next day delivery applies to stocked items only. Availability can be found on the product pages.

Premium Delivery*
£27.50 for delivery before 10:30am
£20.00 for delivery before 12:30pm
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**Separate carriage charges apply to bulk products such as 205L barrels.