The Honda 16166-ZH9-820 Main Nozzle is a genuine OEM component designed for GX270 horizontal shaft engines. As a direct Honda OEM part, it is manufactured to the exact specifications of the original, ensuring the fuel metering characteristics your carburetor depends on are preserved. If your GX270 engine is running rich, running lean, or refusing to hold a steady throttle, a worn or fouled main nozzle is a common culprit — and replacing it with the correct OEM part restores proper fuel delivery across the RPM range.
Key Features
- Correct Fuel Metering — as a genuine Honda OEM part, this main nozzle is sized and finished to the original specification, ensuring the carburetor delivers the right air-fuel ratio at all throttle positions on GX270 engines
- Direct OEM Replacement — this part drops directly into the GX270 carburetor in place of the original, with no modification needed to restore correct fuel circuit function
- GX270 Fitment — built specifically for Honda GX270 horizontal shaft engines; verify your engine serial number against the fitment table to confirm this is the correct nozzle for your serial range
- Restores Engine Response — a degraded or blocked main nozzle causes rough running, poor throttle response, and hard starting; fitting a fresh OEM nozzle brings fuel delivery back to spec and cleans up performance under load
The main nozzle is a precision-calibrated jet inside the carburetor's main fuel circuit. It meters the volume of fuel drawn into the airstream as engine speed rises above idle, directly controlling power output and throttle response under load. Because the nozzle's orifice is extremely small, even minor wear, varnish buildup from stale fuel, or physical damage can disrupt the fuel-air mixture enough to cause rough running, surging, or a significant loss of power. Replacing it with a correctly sized OEM part returns the carburetor to its designed operating balance.
Part Details
| Part Number | 16166-ZH9-820 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Main Nozzle |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Horizontal Shaft Engine | GX270 | 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.
