The Honda 99101-ZN1-1040 Main Jet (#104) is a genuine OEM carburetor component designed for GXV670 vertical shaft engines. As a direct Honda OEM part, it carries the exact sizing — #104 — specified for this engine's fuel metering circuit, ensuring the carburetor delivers the correct air-fuel mixture under all operating conditions. Confirm your engine's serial number against the fitment table before ordering, as Honda periodically supersedes jet specifications at serial breaks within the same model family.
Key Features
- Exact OEM Calibration — the #104 orifice size is precisely matched to the GXV670's fuel delivery requirements, maintaining the correct air-fuel ratio across the engine's full load range
- Direct OEM Replacement — sourced directly from Honda, this jet installs into the carburetor's main circuit without modification, restoring original fuel metering performance
- GXV670 Fitment — confirmed for GXV670 vertical shaft engines; verify your serial number against the fitment table to ensure this is the correct jet for your production range
- Fuel Economy and Power Output — a worn or partially blocked main jet causes rich or lean running conditions, leading to poor throttle response, excessive fuel consumption, or loss of power under load
The main jet is a precision-calibrated orifice inside the carburetor that meters the volume of fuel entering the engine at mid to full throttle. Its orifice diameter — in this case, #104 — is engineered to the engine's displacement and airflow characteristics, so the combustion mixture remains correct regardless of load. When the main jet becomes clogged with varnish deposits or worn beyond its specified diameter, the engine will run lean or rich, causing hard starting, rough operation, and power loss that a simple cleaning or rebuild will not fully resolve without replacing the jet itself.
Part Details
| Part Number | 99101-ZN1-1040 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Main Jet (#104) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Vertical Shaft Engine | GXV670 | 1000599-9999999 |
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.
