The Honda 16166-Z5T-W02 Main Nozzle is a genuine OEM component designed for GX390 horizontal shaft engines. As a direct Honda replacement, this part is manufactured to the same specifications as the original, ensuring accurate fuel metering and consistent carburetor performance. Confirm part number 16166-Z5T-W02 against your engine's serial number and carburetor assembly before ordering.
Key Features
- Genuine OEM Fuel Metering — Honda-sourced and manufactured to original specification, delivering the precise fuel-to-air ratio the GX390 carburetor is calibrated for.
- Direct OEM Replacement — this main nozzle is a drop-in replacement for the original, requiring no modification to the carburetor body or fuel circuit.
- GX390 Fitment — built specifically for GX390 horizontal shaft engines; verify your serial number against the fitment table to confirm this nozzle is correct for your engine's production range.
- Restored Throttle Response — a worn or damaged main nozzle disrupts fuel delivery across the RPM range, causing rough running, bogging under load, and poor throttle response; a fresh OEM nozzle brings fuel metering back to spec.
The main nozzle is the precision-metered orifice inside the carburetor through which fuel is drawn into the airstream during mid-range and full-throttle operation. Its bore diameter is carefully sized to control the fuel-to-air mixture the engine receives, directly affecting power output, fuel efficiency, and smooth running. When the nozzle is clogged, worn, or damaged — common results of stale fuel deposits or debris — the engine will run lean, surge, bog under load, or fail to reach full power, making this a frequent service item during carburetor rebuilds on GX390 engines.
Part Details
| Part Number | 16166-Z5T-W02 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Main Nozzle |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Horizontal Shaft Engine | GX390 | 1126333-1698869 |
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.
