The Honda 16166-ZJ1-R51 Main Nozzle is a genuine OEM component designed for EB11000 generators and GX610 and GX620 horizontal shaft engines. As a direct Honda OEM replacement, this nozzle is manufactured to the exact tolerances required for correct fuel metering in the carburetor — no guesswork, no adjustment needed to get your machine running right. Confirm your engine's serial number against the fitment table before ordering, as Honda supersedes carburetor components at specific serial breaks, and this nozzle must correspond precisely to your unit's configuration.
Key Features
- Exact Fuel Metering — as a genuine Honda OEM part, this nozzle is calibrated to the precise orifice size required for correct air-fuel mixture delivery in the GX610, GX620, and EB11000 carburetor; an incorrect or worn nozzle causes rich or lean running conditions and rough performance.
- Direct OEM Replacement — this nozzle installs directly into the carburetor body in place of the original, with no adaptation required to restore proper fuel flow.
- Broad Fitment Coverage — suits EB11000 generators and GX610 and GX620 horizontal shaft engines, making it a practical stock item for fleet operators and service shops running large-displacement Honda power equipment.
- Serial Number Verification Recommended — Honda updates carburetor parts at engine serial breaks; always check your machine's serial number against the compatibility table to confirm this is the correct nozzle for your specific unit.
The main nozzle is a small but critical precision component inside the carburetor's main circuit. It meters the volume of fuel drawn into the airstream at mid-to-high throttle, controlling the engine's air-fuel ratio under load. When the nozzle is worn, clogged, or incorrectly sized, the engine will run lean or rich — symptoms include loss of power under load, excessive fuel consumption, rough acceleration, or difficulty maintaining a steady speed. Replacing a damaged or fouled nozzle with the correct OEM part restores proper fuel delivery and brings the engine back to its intended operating condition.
Part Details
| Part Number | 16166-ZJ1-R51 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Main Nozzle |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Generator | EB11000 | All |
| Horizontal Shaft Engine | GX610, GX620 | 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.
