The Honda 16016-ZA0-931 Pilot Screw Set is a genuine OEM component designed for a wide range of Honda engines and power equipment, including GX240 and GX270 horizontal shaft engines, GXV270 vertical shaft engines, WT20 and WT30 water pumps, EB3500, EG3500, EM3500, ES6500, and EX3300 generators, the EW140 welder generator, and HRB215 and HRM215 lawn mowers. As a direct OEM replacement, this set delivers the exact fit and calibration Honda engineered into the original carburettor. Confirm your machine's serial number against the fitment table before ordering, as Honda supersedes parts at serial breaks across this broad model range.
Key Features
- Correct Idle Fuel Metering — genuine OEM pilot screw set maintains the precise fuel-to-air mixture at idle that Honda specified for the original carburettor, preventing rich or lean stumble at low throttle
- Broad OEM Coverage — a single genuine part number covers GX240 and GX270 horizontal shaft engines, GXV270 vertical shaft engines, WT20 and WT30 water pumps, multiple generators including the EW140 welder generator, and HRB215 and HRM215 lawn mowers
- Direct Carburettor Replacement — engineered to the original dimensions and thread pitch, this set installs into the carburettor body without modification
- Serial Number Verification Recommended — Honda updates part supersessions at specific serial breaks across this model range; check your unit's serial number against the fitment table to confirm this is the correct set for your machine
The pilot screw — also called the fuel screw or mixture screw — controls the richness of the air-fuel mixture delivered to the engine at idle and light throttle. It meters a small but critical flow of fuel through the carburettor's pilot circuit, and its precise setting is what determines whether the engine idles smoothly, hunts, stalls, or runs rough at low speed. When a pilot screw wears, corrodes, or is damaged during cleaning, the carburettor loses the ability to hold a consistent idle mixture, resulting in an unstable or non-responsive idle. Replacing the entire set restores that metering function and brings idle quality back to the original specification.
Part Details
| Part Number | 16016-ZA0-931 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Pilot Screw Set |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Generator | EB3500, EG3500, EM3500, ES6500, EX3300 | All |
| Horizontal Shaft Engine | GX240, GX270 | All |
| Lawn Mower | HRB215, HRM215 | All |
| Vertical Shaft Engine | GXV270 | All |
| Water Pump | WT20, WT30 | All |
| Welder Generator | EW140 | 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.
