NGK CMR5H Spark Plug for GX25 GX35 Trimmer Blower Edger

Keep your 4-stroke garden equipment running at peak performance with this NGK CMR5H Replacement Spark Plug — a precise, reliable fit for Honda GX25 and GX35 motors used in trimmers, blowers, and lawn edgers. Built from a durable aluminium-copper alloy construction, this plug delivers consistent ignition and dependable starts every time you need it.

Compatible Models

This spark plug is engineered as a direct replacement for the following 4-stroke trimmers and blowers:

• Honda GX25 & GX35 motors
• ULT425, UMS425, UMK425, UMK435
• UMC425, UMC435, HHB25, HHH25
• Atom Lawn Edgers equipped with GX25 or GX35 motors

Why Choose This Spark Plug?

• 🔧 Direct OEM-style replacement — drops straight in, no modifications needed
• ⚡ Consistent ignition — aluminium-copper alloy construction for reliable sparking
• 🌿 Broad compatibility — fits a wide range of popular 4-stroke outdoor power equipment
• 💡 Easy maintenance — a simple swap that restores engine performance quickly
• 💰 Excellent value — professional-grade performance at an everyday price

Product Specifications

• Type: NGK CMR5H Replacement Spark Plug
• Material: Aluminium-Copper Alloy
• Application: 4-Stroke Trimmers & Blowers
• Package Includes: 1 × Spark Plug

For more information on small engine maintenance best practices, visit the U.S. Consumer Product Safety Commission – Lawn & Garden Safety.

Frequently Asked Questions

Q: Which engines and machines is the CMR5H spark plug compatible with?

A: The NGK CMR5H spark plug is designed as a direct replacement for Honda GX25 and GX35 motors, and is also compatible with ULT425, UMS425, UMK425, UMK435, UMC425, UMC435, HHB25, and HHH25 models. It also fits Atom Lawn Edgers powered by GX25 or GX35 motors — making it a versatile choice for a wide range of 4-stroke trimmers, blowers, and edgers.

Q: What material is the CMR5H replacement spark plug made from?

A: This spark plug is constructed from an aluminium-copper alloy, chosen for its excellent thermal conductivity and durability, ensuring consistent ignition performance over repeated use in 4-stroke outdoor power equipment.

Q: How do I know when my spark plug needs replacing?

A: Common signs that a spark plug needs replacing include difficulty starting the engine, rough idling, reduced power output, or increased fuel consumption. Routine replacement as part of scheduled maintenance — typically each season — helps keep your trimmer, blower, or edger running smoothly.

Q: How many spark plugs are included in the package?

A: Each package includes 1 × NGK CMR5H replacement spark plug. If you maintain multiple machines, consider purchasing additional units to have a spare on hand for quick, easy servicing.