The Honda 16016-ZN1-801 Pilot Screw Set is a genuine OEM Pilot Screw Set designed for GX670 horizontal shaft engines and GXV620 and GXV670 vertical shaft engines. As a direct Honda OEM replacement, this set delivers the exact metering geometry and calibration Honda specifies for correct idle fuel mixture on these large-displacement engines. Confirm your engine's serial number against the fitment table before ordering, as Honda supersedes parts at serial breaks and a different screw set may apply to your serial range.
Key Features
- OEM Fuel Metering Accuracy — genuine Honda construction means the pilot screw taper, seat angle, and circuit sizing match the carburetor's idle and low-speed circuits exactly, so mixture adjustment behaves as Honda intended rather than hunting or stalling.
- Direct Carburetor Replacement — this set is engineered to drop into the pilot circuit of the original carburetor with no reworking of the bore or seat required.
- Broad Fitment Across Large-Displacement Honda Engines — covers GX670 horizontal shaft engines and GXV620 and GXV670 vertical shaft engines; verify your model and serial number using the fitment table to confirm the correct set for your unit.
- Restored Idle Quality — a worn or damaged pilot screw allows unmetered air into the idle circuit, causing rough idle, stumbling off-throttle, and difficulty holding a steady no-load speed; a fresh OEM set brings the circuit back to specification.
The pilot screw is the fine-adjustment component in a carburetor's idle and low-speed fuel circuit. It controls the ratio of fuel to air delivered to the engine at idle and during light-throttle transitions, and small changes to its position have a direct effect on how smoothly the engine idles and responds as throttle is applied. When a pilot screw wears at its tapered tip, develops a damaged seat, or is lost during service, the idle circuit can no longer be set correctly — the engine may idle erratically, stall under light load, or refuse to hold a steady speed. Replacing the screw set with part number 16016-ZN1-801 restores the carburetor's ability to be tuned accurately and the engine's ability to run cleanly at all throttle positions.
Part Details
| Part Number | 16016-ZN1-801 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Pilot Screw Set |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Horizontal Shaft Engine | GX670 | All |
| Vertical Shaft Engine | GXV620, GXV670 | 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.
