The Honda 16100-ZL9-804 Carburetor Assembly (BB63B D) is a genuine OEM carburetor assembly designed for GC135 and GC160 horizontal shaft engines, WN20 and WN30 water pumps, and FG400 and FG500 tillers. As a direct Honda OEM component, this carburetor assembly is manufactured to the same specifications as the original unit it replaces, ensuring correct fuel metering and air-fuel mixture delivery right out of the box. The BB63B D designation identifies a specific carburetor variant, so buyers should confirm their existing carburetor matches part number 16100-ZL9-804 before ordering. Honda supersedes carburetor assemblies at serial breaks, so verifying your machine's serial number against the fitment table is a smart step before purchase.
Key Features
- Correct Fuel Metering — genuine OEM construction means the jets, needle, and float are calibrated to Honda's original air-fuel specifications for clean starting and consistent throttle response
- BB63B D Variant — the carburetor variant code identifies this assembly precisely; match it to the original unit on your machine to confirm you have the right replacement
- Broad OEM Fitment — listed for GC135 and GC160 horizontal shaft engines, WN20 and WN30 water pumps, and FG400 and FG500 tillers, including applications across multiple Honda equipment catalogues
- Serial Number Verification Recommended — Honda updates carburetor assemblies mid-production, so check your machine's serial number against the fitment table to confirm this assembly is correct for your unit
- Restore Lost Power and Starting Performance — a worn or gummed carburetor causes hard starting, rough idle, and fuel starvation under load; replacing it with this assembly restores proper engine operation
The carburetor assembly is responsible for mixing air and fuel in the precise ratio the engine needs to start, idle, and run under load. It meters fuel through calibrated jets and a float-controlled needle valve, then blends it with incoming air before delivering the mixture to the combustion chamber. When a carburetor wears, becomes clogged with varnish deposits, or develops internal leaks, the engine suffers hard starting, erratic idling, fuel flooding, or a loss of power — replacing the assembly rather than attempting to rebuild a damaged unit restores dependable operation quickly.
Part Details
| Part Number | 16100-ZL9-804 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Carburetor Assembly (BB63B D) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Horizontal Shaft Engine | GC135, GC160 | All |
| Tiller | FG400, FG500 | All |
| Water Pump | WN20, WN30 | 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.
