The Honda 16166-ZE3-821 Main Nozzle is a genuine OEM component designed for EM5000 generators and EM7000 inverter generators. Sourced directly from Honda, this part carries the exact specifications required for correct fuel metering in these units. If your generator is running rich, running lean, or struggling to maintain consistent output under load, a worn or clogged main nozzle is a common cause — and replacing it with the correct OEM part restores proper carburetor function. Always confirm your unit's serial number against the fitment table before ordering, as Honda updates part numbers at production breaks.
Key Features
- Correct Fuel Metering — as a genuine Honda OEM main nozzle, this part delivers the precise orifice sizing the carburetor requires for accurate fuel delivery across the engine's operating range
- Direct OEM Replacement — manufactured to Honda's original specifications, this nozzle installs directly into the carburetor without modification, ensuring a proper seal and consistent performance
- Confirmed Fitment — designed for EM5000 generators and EM7000 inverter generators; verify your serial number against the fitment table, as Honda supersedes components at production breaks
- Restores Consistent Power Output — a degraded or blocked main nozzle disrupts the air-fuel ratio, causing rough running, poor load response, or hard starting; this OEM part brings the carburetor back to specification
The main nozzle is a precision-calibrated jet housed inside the carburetor body. Its job is to meter the correct volume of fuel into the airstream passing through the carburetor, maintaining the air-fuel ratio the engine needs to run cleanly and produce steady power. Because the nozzle orifice is very small, it is highly susceptible to blockage from fuel deposits, varnish, or debris — and even a partial restriction throws off fuel delivery enough to cause hard starting, erratic speed, or loss of output under load. Replacing a worn or fouled main nozzle with a genuine Honda OEM part is one of the most effective carburetor service steps for restoring normal generator operation.
Part Details
| Part Number | 16166-ZE3-821 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Main Nozzle |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Generator | EM5000 | All |
| Inverter Generator | EM7000 | 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.
