NGK 7599 CMR5H Spark Plug – Replacement Lawn & Garden Equipment Engine Ignition Component

Part Number: 7599
Category: NGK Lawn & Garden Equipment Engine Replacement Parts
Type: Replacement CMR5H Copper Core Resistor Spark Plug

The NGK 7599 CMR5H Spark Plug is a replacement engine ignition component designed for compatible gasoline-powered lawn and garden equipment, including string trimmers, brush cutters, and small engines. Featuring a copper-core center electrode, nickel-alloy electrodes, and built-in resistor technology, this spark plug supports dependable ignition performance while helping reduce electrical interference. The NGK CMR5H features a 10mm thread diameter, 12.7mm (1/2-inch) thread reach, 16mm (5/8-inch) hex size, and a preset electrode gap of 0.028 inches (0.7mm). Its compact design and NGK heat range 5 make it suitable for designated small engine applications. Ideal for replacing worn, fouled, or damaged spark plugs, the NGK 7599 helps maintain reliable engine starting, consistent combustion, and dependable outdoor power equipment performance.

Product Specifications

• Part Number: 7599

• Brand: NGK

• Spark Plug Model: CMR5H

• Product Series: NGK Standard

• Product Type: Small Engine Spark Plug

• Component Type: Engine Ignition Resistor Spark Plug

• Center Electrode Core: Copper

• Electrode Tip Material: Nickel Alloy

• Thread Diameter: 10mm

• Thread Pitch: 1.0mm

• Thread Reach: 12.7mm (1/2")

• Hex Size: 16mm (5/8")

• Seat Type: Gasket Seat

• Heat Range: NGK 5

• Preset Electrode Gap: 0.028" (0.7mm)

• Resistor Type: Resistor Spark Plug

• Approximate Resistance: 10,000 Ohms

• Terminal Type: Non-Removable Nut

• Application: Small Gasoline Engine Ignition System Maintenance

• Quantity: 1 Spark Plug

• Condition: New

Features & Benefits

• Genuine NGK 7599 CMR5H replacement spark plug

• Copper-core center electrode supports efficient heat dissipation

• Nickel-alloy electrodes provide dependable ignition performance

• Built-in resistor helps reduce ignition-related electrical interference

• Features a 10mm thread diameter and 12.7mm thread reach

• Preset 0.028-inch electrode gap for compatible engine applications

• Compact design suitable for designated small engine ignition systems

• Helps maintain reliable engine starting and consistent combustion

• Replaces worn, fouled, damaged, or deteriorated spark plugs

Applications

• Select Honda GX25 gasoline engines

• Compatible Honda-powered string trimmers and brush cutters

• Select Hitachi CG25EUS brush cutters

• Compatible Oleo-Mac BC 260 4S equipment

• Small gasoline engine ignition maintenance

• String trimmer and brush cutter engine servicing

• Outdoor power equipment spark plug replacement

• Equipment specifying NGK CMR5H or NGK 7599 spark plugs

Important Notes

• Verify NGK part number 7599 and spark plug model CMR5H before ordering

• This listing is for one replacement spark plug, not a complete ignition system or maintenance kit

• Confirm compatibility with your specific engine model and specification number

• Verify the required 10mm thread diameter, 12.7mm thread reach, and gasket-style seat

• The listed electrode gap is 0.028 inches (0.7mm); follow the engine manufacturer's recommended gap

• Do not assume compatibility with every Honda, Hitachi, or other small gasoline engine

• Check the engine manufacturer's parts diagram before purchasing

• Use the recommended spark plug tightening torque during installation

• Replace worn, fouled, cracked, or damaged spark plugs according to the manufacturer's maintenance schedule

• Ensure the ignition connection is properly secured before operating the engine