The Honda 16166-ZL9-003 Main Nozzle is a genuine OEM replacement designed for GC135 and GC160 horizontal shaft engines, FG400 and FG500 tillers, and WN20 and WN30 water pumps. As a direct OEM component, this nozzle is manufactured to Honda's exact specifications, ensuring the fuel metering calibration your carburetor requires is preserved. Confirm part number 16166-ZL9-003 against your machine's serial number and model before ordering, as Honda supersedes parts at serial breaks and fitment can vary across production runs.
Key Features
- Precise Fuel Metering — manufactured to Honda OEM specification, this main nozzle delivers the correct fuel flow calibration for consistent carburetor performance across the engine's operating range
- Broad OEM Fitment — covers GC135 and GC160 horizontal shaft engines, FG400 and FG500 tillers, and WN20 and WN30 water pumps, including machines in multiple Honda product lines
- Direct OEM Replacement — sourced directly from Honda, this part installs as a drop-in replacement in the carburetor assembly with no modification to surrounding components
- Verify Your Serial Number — Honda updates part supersessions at production serial breaks; check your machine's serial number against the fitment table to confirm this nozzle is correct for your unit
- Restore Throttle Response and Fuel Economy — a worn or damaged main nozzle disrupts the air-fuel mixture, causing rough running, hesitation under load, and excess fuel consumption; replacing it restores clean combustion and stable power output
The main nozzle is a small but critical component inside the carburetor's fuel circuit. It meters the flow of fuel drawn from the float bowl into the main air passage, controlling the air-to-fuel ratio that the engine burns under mid-to-full throttle. When the nozzle is worn, clogged, or damaged — often from ethanol fuel deposits or debris — the mixture becomes too lean or too rich, resulting in hard starting, loss of power, surging, or excessive fuel consumption. Replacing it with a genuine Honda nozzle restores the correct mixture calibration and brings the engine back to smooth, responsive operation.
Part Details
| Part Number | 16166-ZL9-003 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Main Nozzle |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Horizontal Shaft Engine | GC135, GC160 | All |
| Tiller | FG400, FG500 | All |
| Water Pump | WN20, WN30 | 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.
