CMR5H Spark Plug for GX25 GX35 Trimmer Blower & Lawn Edger
CMR5H Spark Plug for GX25 GX35 Trimmer Blower & Lawn Edger
CMR5H Spark Plug – Replacement for GX25 & GX35 4-Stroke Engines
Keep your outdoor power equipment running at peak performance with this precision-engineered CMR5H spark plug. Designed specifically for Honda GX25 and GX35 4-stroke engines, this replacement plug features an iridium electrode for sharper ignition, faster starts, improved acceleration, and more efficient combustion — all while being more environmentally conscious than conventional spark plugs.
Key Features
- Iridium Electrode: Fine-tip ground electrode design delivers superior ignition spark for consistent, reliable engine starts.
- Advanced Combustion: Technically optimised design promotes better fuel combustion and overall engine performance.
- Wide Compatibility: Fits a broad range of Honda 4-stroke trimmers, blowers, and edgers — see full compatibility list below.
- Direct Replacement: Drop-in fit — no modifications needed. Replaces OEM CMR5H specification plugs.
- Eco-Friendly Design: Cleaner combustion reduces emissions compared to standard spark plug types.
Specifications
- Part Number: CMR5H
- Electrode Material: Iridium
- Engine Type: 4-Stroke
- Quantity: 1 x Spark Plug
Compatible Models
- Honda GX25, GX35
- Honda ULT425, UMS425, UMK425, UMK435
- Honda UMC425, UMC435
- Honda HHB25, HHH25
- Atom Lawn Edger (with GX25 or GX35 motor)
Package Includes
- 1 x CMR5H Replacement Spark Plug
Made in Mainland China.
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Frequently Asked Questions
Q: Which engines is the CMR5H spark plug compatible with?
A: This CMR5H spark plug is compatible with Honda GX25 and GX35 4-stroke engines, as well as models including ULT425, UMS425, UMK425, UMK435, UMC425, UMC435, HHB25, and HHH25. It also fits Atom Lawn Edgers equipped with GX25 or GX35 motors.
Q: What makes this spark plug better than a standard replacement?
A: The CMR5H features an iridium electrode with a fine-tip ground electrode design, which produces a stronger, more consistent ignition spark. This results in faster engine starts, improved acceleration, and more efficient combustion compared to conventional copper-tip spark plugs.
Q: How difficult is it to install this CMR5H spark plug?
A: Installation is straightforward — this is a direct OEM-spec replacement requiring no modifications. Simply remove the old spark plug and thread in the new CMR5H. We recommend checking your engine manual for the correct torque specification when tightening.