The Honda 16166-Z4H-WA1 Main Nozzle is a genuine OEM component designed for GX120 horizontal shaft engines. Sourced directly from Honda, this part meets the exact specifications of the original and delivers the precise fuel metering your carburetor depends on. If your GX120 engine is running rich, lean, or surging, a worn or clogged main nozzle is a common culprit — and this OEM replacement brings the fuel circuit back to spec.
Key Features
- Correct Fuel Metering — as a genuine Honda OEM part, this nozzle carries the exact orifice geometry required for proper air-fuel mixture in the GX120 carburetor, ensuring the engine runs as Honda intended
- Direct OEM Replacement — this part drops into the existing carburetor assembly without modification, restoring the fuel circuit to its original condition
- GX120 Fitment — built specifically for GX120 horizontal shaft engines; verify your engine's serial number against the fitment table to confirm this is the correct nozzle for your serial range
- Restores Engine Response — a properly functioning main nozzle supports smooth throttle response and consistent power output; a degraded or blocked nozzle leads to fuel delivery faults that affect performance under load
The main nozzle is a precision-calibrated jet inside the carburetor that meters fuel flow from the float bowl into the main bore during mid-to-full throttle operation. The diameter of its orifice is critical — too small and the engine runs lean and loses power; too large or eroded and it runs rich, fouling the spark plug and wasting fuel. Because the nozzle sits immersed in fuel and handles constant flow, it can corrode, clog with varnish deposits, or wear over time, making it one of the first components to inspect during a carburetor rebuild on a GX120 engine.
Part Details
| Part Number | 16166-Z4H-WA1 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Main Nozzle |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Horizontal Shaft Engine | GX120 | 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.
