The Honda 99201-ZG8-1120 Main Jet Set (#112) is a genuine OEM component designed for GX610 and GX620 horizontal shaft engines, GXV610 and GXV620 vertical shaft engines, and HRC7018 and HRC7020 commercial mowers. As a direct OEM replacement, this jet set is manufactured to Honda's exact specifications, ensuring the correct fuel metering calibration for each application. Confirm your engine model and serial number against the fitment table before ordering, as Honda supersedes carburetor components at serial breaks and the #112 designation identifies this specific jet sizing — the number must match your carburetor's requirement exactly.
Key Features
- Exact Fuel Metering — the #112 jet size is a precise calibration value; installing the correct size is critical to maintaining the air-fuel ratio these engines rely on for consistent power output.
- Genuine OEM Construction — sourced directly from Honda, this jet set is manufactured to the same specification as the original, so fuel flow characteristics remain unchanged from the factory build.
- Broad Fitment Coverage — listed for GX610, GX620, GXV610, GXV620, HRC7018, and HRC7020 applications; always verify your model and serial number against the compatibility table to confirm this is the correct jet for your carburetor.
- Restores Carburetor Performance — a worn, clogged, or incorrectly sized main jet causes rich or lean running conditions, rough idle, poor throttle response, and potential engine damage under load; replacing it with the correct OEM jet restores clean combustion.
The main jet is the metering orifice inside the carburetor that controls how much fuel is drawn into the engine under mid-to-wide-open throttle conditions. Its calibrated bore size — in this case #112 — determines the fuel-to-air ratio the engine runs on, directly affecting power, efficiency, and emissions. When a main jet becomes clogged with varnish deposits or wears over time, the engine may run lean and overheat, or rich and foul its spark plugs, making prompt replacement with a correctly sized OEM jet essential to restoring proper operation.
Part Details
| Part Number | 99201-ZG8-1120 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Main Jet Set (#112) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Commercial Mower | HRC7018, HRC7020 | All |
| Horizontal Shaft Engine | GX610, GX620 | All |
| Vertical Shaft Engine | GXV610, GXV620 | 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.
