The Honda 16950-ZA0-023 Petcock Assembly is a genuine OEM component designed for GX610, GX620, GX630, GX660, and GX690 horizontal shaft engines, as well as EB11000, EL5000, and ES6500 generators. As a factory-original part, this assembly is built to Honda's exact specifications, ensuring correct fuel flow control and a leak-free seal in the fuel line. Confirm your machine's serial number against the fitment table before ordering, as Honda supersedes parts at serial breaks and more than one variant may be listed for these models.
Key Features
- Genuine OEM Fuel Control — factory-original Honda part engineered for precise on/off and reserve fuel metering, with correct porting geometry that aftermarket alternatives may not replicate.
- Broad Horizontal Engine Coverage — fits GX610, GX620, GX630, GX660, and GX690 horizontal shaft engines, as well as EB11000, EL5000, and ES6500 generators, including coverage across multiple serial ranges within those families.
- Leak-Free Fitment — designed to match Honda's original fuel line connection points exactly, replacing a worn or seeping petcock before fuel leaks develop into a more serious issue.
- Serial Number Verification Recommended — Honda assigns different part numbers across serial breaks on these models; check your machine's serial number against the compatibility table to confirm this is the correct assembly for your unit.
- Restores Reliable Fuel Shutoff — a degraded petcock can allow fuel to seep past the valve when the engine is off, causing carburetor flooding and hard starts; replacing this assembly restores proper shutoff function.
The petcock assembly is the fuel shutoff valve mounted between the fuel tank and the carburetor. It controls whether fuel flows freely to the engine, is shut off completely, or is drawn from the tank's reserve position. When the petcock's internal seal or valve body wears out, it can seep fuel past the closed position, leading to carburetor flooding, fuel odor, and difficult starting — or it may restrict flow and cause the engine to run lean and stall under load. Replacing a faulty petcock assembly restores clean, controlled fuel delivery and proper shutoff, protecting both the carburetor and the surrounding equipment from unnecessary fuel exposure.
Part Details
| Part Number | 16950-ZA0-023 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Petcock Assembly |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Generator | EL5000, ES6500 | 1037490-9999999 |
| Generator | EB11000 | All |
| Horizontal Shaft Engine | GX610 | 1000001-1038197 |
| Horizontal Shaft Engine | GX620, GX630, GX660, GX690 | 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.
