The Honda 16166-Z4V-921 Main Nozzle is a genuine OEM component designed for GX200 horizontal shaft engines. As a direct-from-Honda replacement, this part carries the exact calibration and dimensions specified for the GX200 carburetor, ensuring the engine receives the correct air-fuel mixture across its operating range. If your engine is running rich, running lean, hesitating under load, or failing to reach full power, a worn or damaged main nozzle is a common cause — and this OEM part is the correct fix.
Key Features
- Genuine OEM Fuel Metering Accuracy — manufactured to Honda's exact orifice specification, this nozzle delivers the precise fuel flow rate the GX200 carburetor is calibrated around, not an approximation.
- Direct Carburetor Fit — engineered as a drop-in replacement for the GX200, this part installs into the carburetor body without modification or adaptation to the fuel circuit.
- GX200 Fitment — confirmed for GX200 horizontal shaft engines; verify your engine's serial number against the fitment table to confirm this nozzle applies to your production run.
- Restored Power and Throttle Response — a correctly sized main nozzle keeps the engine pulling cleanly through the mid and full-throttle range; a clogged or eroded nozzle produces stumbling, black smoke, or fuel starvation under load.
The main nozzle is a small but critical precision component inside the carburetor body. It meters the flow of fuel drawn from the float bowl into the main fuel circuit during mid-range and wide-open throttle operation, working in concert with the needle and jet to maintain the correct air-fuel ratio. Because the orifice diameter is machined to a tight tolerance, any wear, corrosion, or blockage — even partial — shifts the mixture and degrades engine performance noticeably. Replacing a faulty main nozzle with a genuine Honda part restores the fuel delivery the GX200 was designed to run on.
Part Details
| Part Number | 16166-Z4V-921 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Main Nozzle |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Horizontal Shaft Engine | GX200 | 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.
