The Honda 30500-Z5T-801 Ignition Coil Assembly (NGK Y-EZD) is a genuine OEM ignition coil assembly designed for GX390 horizontal shaft engines. As a direct Honda OEM component, this part is built to the exact specification required for consistent, high-energy spark delivery on the GX390. Confirm your engine's serial number against the fitment table before ordering, as Honda supersedes parts at serial breaks and this assembly is application-specific. Part number 30500-Z5T-801 is the correct reference to verify against your engine's parts diagram.
Key Features
- OEM Ignition Output — engineered to produce the precise voltage and timing the GX390 requires for clean combustion across the full operating range, unlike generic coils that may fire weak or inconsistently
- NGK Y-EZD Specification — the NGK Y-EZD designation identifies this as a specific coil variant; confirm this matches your engine's parts diagram to ensure the correct ignition curve for your unit
- Direct OEM Replacement — manufactured to Honda's original dimensions and air-gap specification, allowing installation without modification or special tooling
- Serial Number Awareness — Honda updates ignition components at defined production breaks on the GX390; check your engine's serial number against the fitment table to confirm part number 30500-Z5T-801 is correct for your unit
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. On a GX390 horizontal shaft engine, a correctly functioning coil delivers a strong, consistent spark that supports clean starting, stable idle, and full power output under load. When the coil begins to fail — through heat degradation, internal winding breakdown, or air-gap wear — the engine may exhibit hard starting, misfiring, loss of power, or a complete no-start condition. Replacing the assembly with the correct OEM unit restores the ignition system to the original specification and eliminates those symptoms.
Part Details
| Part Number | 30500-Z5T-801 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Ignition Coil Assembly (NGK Y-EZD) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Horizontal Shaft Engine | GX390 | 4221059-9999999 |
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.
