The Honda 30500-Z3E-004 Ignition Coil Assembly is a genuine OEM component designed for the GX25 horizontal shaft engine, FG110 tiller, WX10 water pump, HHT25 trimmer, and UMC425 trimmer. As a direct Honda OEM replacement, this Ignition Coil Assembly is manufactured to the same specification as the original, ensuring the timing and spark output your machine depends on. Confirm your unit's serial number against the fitment table before ordering, as Honda supersedes ignition components at specific serial breaks.
Key Features
- OEM Spark Output — sourced directly from Honda, this Ignition Coil Assembly delivers the correct voltage and timing the GX25 engine and compatible equipment require for consistent ignition across the power band.
- Broad Genuine OEM Fitment — covers the GX25 horizontal shaft engine, FG110 tiller, WX10 water pump, HHT25 trimmer, and UMC425 trimmer; use part number 30500-Z3E-004 to confirm this is the right coil for your unit.
- Direct OEM Replacement — installs in place of the original coil with no rework needed, restoring the air-gap and trigger relationship Honda engineers built into these small-displacement platforms.
- Serial Number Verification Advised — Honda updates ignition coil specifications at production serial breaks; check your machine's serial number against the compatibility table to confirm this assembly is correct for your specific build.
- Restores Hard-Start and Misfire Conditions — a degraded or failed ignition coil is one of the most common causes of hard starting, rough running, and sudden cutout on small Honda engines and equipment; replacing this assembly addresses those symptoms at the source.
The ignition coil assembly generates the high-voltage electrical pulse that fires the spark plug at precisely the right moment in the engine's combustion cycle. It does this by building a magnetic field through a primary winding, then collapsing it rapidly to induce a surge of voltage in the secondary winding — a surge strong enough to jump the spark plug gap and ignite the air-fuel mixture. When the coil weakens or fails, the spark becomes inconsistent or disappears altogether, leaving the engine difficult to start, prone to misfiring under load, or unable to run at all. Replacing the Ignition Coil Assembly with a genuine Honda OEM part restores correct spark energy and timing, bringing the engine back to the performance it was built for.
Part Details
| Part Number | 30500-Z3E-004 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Ignition Coil Assembly |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Horizontal Shaft Engine | GX25 | All |
| Tiller | FG110 | 4229984-9999999 |
| Trimmer | UMC425 | 3016121-9999999 |
| Trimmer | HHT25 | All |
| Water Pump | WX10 | All |
Verify Before You Order
Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.
Why Buy From DHS Equipment
Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.
Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.
