The Honda 99102-ZM3-0350 Jet (#35.5) is a genuine OEM main jet designed for GX22 and GX31 horizontal shaft engines, the HHE31 stick edger, HHT31 trimmer, UMK422 and UMK431 trimmers, and the WX10 water pump. As a direct Honda OEM replacement, this jet carries the exact sizing and calibration Honda specifies for these units, ensuring the carburetor delivers the correct fuel-to-air ratio across the operating range.
Key Features
- Exact Fuel Metering — calibrated to the #35.5 orifice specification Honda requires for correct mixture delivery in these small-displacement engines
- Genuine OEM Part — sourced directly from Honda, so the sizing, material, and thread form match the original jet removed from your carburetor
- Broad Fitment — listed for GX22 and GX31 horizontal shaft engines, WX10 water pumps, HHE31 stick edger, HHT31, UMK422, and UMK431 trimmers; verify your serial number against the fitment table to confirm applicability
- Restore Throttle Response — a clogged or worn jet causes lean-running, hard starting, and erratic idle; replacing it with the correct #35.5 jet restores smooth power delivery and clean throttle response
A main jet is the precision metering orifice inside the carburetor that controls how much fuel enters the air stream at mid to full throttle. The calibrated hole — in this case sized at #35.5 — determines the fuel-to-air ratio the engine runs on, and that ratio must be correct for the engine to start easily, idle smoothly, and develop full power under load. When a jet becomes blocked with varnish from stale fuel or wears beyond its original diameter, the engine runs either too lean or too rich, leading to hard starting, rough idling, loss of power, or overheating. Fitting the correct Honda OEM replacement jet restores the carburetor to its original fuel delivery specification.
Part Details
| Part Number | 99102-ZM3-0350 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Jet (#35.5) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Horizontal Shaft Engine | GX22, GX31 | All |
| Stick Edger | HHE31 | 1432193-9999999 |
| Trimmer | HHT31, UMK422, UMK431 | All |
| Water Pump | WX10 | 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.
