The Honda 16100-Z4H-WA1 Carburetor Assembly (BE99L A) is a genuine OEM carburetor assembly designed for GX120 horizontal shaft engines, WB20, WB30, WH15, and WH20 water pumps. As a direct Honda OEM component, this carburetor is engineered to Honda's exact specifications for fuel metering and air-fuel mixture delivery, ensuring the engine starts and runs as intended. Confirm part number 16100-Z4H-WA1 and the BE99L A variant code against your machine's parts list before ordering, as Honda offers multiple carburetor configurations across these models.
Key Features
- Correct Jetting and Fuel Metering — genuine OEM construction means the jets, needle, and emulsion circuits are calibrated to Honda's specification for the BE99L A configuration, not approximated.
- Variant-Specific Fit — the BE99L A designation identifies a specific carburetor variant; verify this code matches your existing unit before installation to ensure a correct interchange.
- Broad Model Coverage — fits GX120 horizontal shaft engines and WB20, WB30, WH15, and WH20 water pumps, covering a wide range of Honda small-engine and pump applications.
- Serial Number Verification Recommended — Honda supersedes carburetor part numbers at production breaks, so cross-check your machine's serial number against the fitment table to confirm this assembly is correct for your unit.
- Restored Throttle Response and Starting — a worn or gummed carburetor causes hard starting, rough idle, and fuel starvation under load; replacing it with this OEM assembly restores clean fuel delivery and consistent engine performance.
A carburetor assembly mixes air and fuel in the correct ratio before delivering the mixture to the engine's combustion chamber. It manages fuel flow at idle, mid-range, and wide-open throttle through a system of calibrated jets, a float, and a needle valve that regulates fuel level in the bowl. When a carburetor wears, clogs with varnish from stale fuel, or develops a float leak, the engine becomes difficult to start, runs unevenly, surges at load, or shuts down entirely under demand — symptoms that are especially disruptive in pump applications where continuous output is critical. Replacing the carburetor assembly with a genuine OEM unit restores the precise air-fuel calibration the engine requires.
Part Details
| Part Number | 16100-Z4H-WA1 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Carburetor Assembly (BE99L A) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Horizontal Shaft Engine | GX120 | All |
| Water Pump | WB20, WB30 | 1000001-1383921 |
| Water Pump | WH15, WH20 | 1000001-1385388 |
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.
