The Honda 16166-ZCN-WF1 Main Nozzle is a genuine OEM component designed for GX630, GX660, and GX690 horizontal shaft engines and GXV630, GXV660, and GXV690 vertical shaft engines. As a direct OEM replacement, this nozzle meets Honda's original specifications for fuel metering in the carburetor, ensuring the engine receives the correct air-fuel mixture across its operating range. Confirm your engine's serial number against the fitment table before ordering, as Honda supersedes parts at specific serial breaks within these large-displacement series.
Key Features
- Correct Fuel Metering — as a genuine Honda OEM part, this nozzle is calibrated to deliver the precise fuel flow the carburetor requires, maintaining combustion efficiency in these large-displacement engines
- Direct OEM Replacement — manufactured to the same specification as the original, this nozzle installs directly into the carburetor without alteration
- Broad Fitment Across the 630–690 Range — covers GX630, GX660, and GX690 horizontal shaft engines as well as GXV630, GXV660, and GXV690 vertical shaft engines; verify your serial number against the fitment table to confirm the correct application
- Protects Engine Performance — a worn or blocked main nozzle disrupts the fuel circuit, causing lean running, rough idle, power loss, or hard starting; replacing it restores clean, consistent fuel delivery
The main nozzle is a precision-drilled jet inside the carburetor that controls the volume of fuel drawn into the air stream during mid-range and full-throttle operation. Its orifice diameter is calibrated for a specific engine's fuel demand, making it a critical component in achieving the correct air-fuel ratio. When the nozzle becomes clogged with varnish deposits or worn beyond its original dimensions, the engine runs lean, hesitates under load, or loses power — symptoms that a new OEM nozzle corrects by restoring the carburetor's designed fuel flow.
Part Details
| Part Number | 16166-ZCN-WF1 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Main Nozzle |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Horizontal Shaft Engine | GX630, GX660, GX690 | All |
| Vertical Shaft Engine | GXV630, GXV660, GXV690 | 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.
