The Honda 16100-ZM7-U31 is a genuine OEM Carburetor Assembly (BF31H A/B) designed for GXH50 horizontal shaft engines. As a direct Honda OEM component, this carburetor is built to the exact specifications of the original unit, ensuring correct fuel metering, air-fuel mixture calibration, and throttle response right out of the box. Verify part number 16100-ZM7-U31 and the BF31H A/B variant designation against your engine's serial number and existing carburetor before ordering, as Honda supersedes carburetor assemblies at production breaks.
Key Features
- Correct Fuel Metering — genuine OEM jetting and needle settings match the original calibration of the GXH50 engine, so fuel delivery and mixture ratio are accurate from the first start
- Direct OEM Replacement — this carburetor assembly replaces the original unit on GXH50 horizontal shaft engines with no adjustment to mounting or linkage
- Variant-Specific Fitment — the BF31H A/B designation identifies this as a specific carburetor variant; confirm this matches the unit on your GXH50 before purchasing
- Serial Number Verification Recommended — Honda updates carburetor assemblies at serial number breaks, so cross-check your engine's serial number against the fitment table to confirm this is the correct assembly for your unit
The carburetor is responsible for mixing air and fuel in the precise ratio the engine needs to run cleanly and efficiently. On a compact horizontal shaft engine like the GXH50, the carburetor governs everything from cold starting and idle stability to full-throttle output — a worn, blocked, or incorrectly specified carburetor leads to hard starting, rough idle, poor power delivery, and excessive fuel consumption. Replacing a failed or damaged carburetor assembly with the correct OEM unit restores the engine's original fuel delivery characteristics and brings performance back to specification.
Part Details
| Part Number | 16100-ZM7-U31 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Carburetor Assembly (BF31H A/B) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Horizontal Shaft Engine | GXH50 | 1000001-1139697 |
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.
