The Honda 16100-Z6L-803 Carburetor Assembly (BK05C C) is a genuine OEM carburetor assembly designed for GX630, GX660, and GX690 horizontal shaft engines. As a direct Honda OEM component, this carburetor assembly carries the BK05C C specification, which identifies the exact jetting, metering, and circuit configuration Honda engineered for these large-displacement engines — making part number 16100-Z6L-803 the correct replacement when refueling performance or idle quality has degraded. Confirm your engine's serial number against the fitment table before ordering, as Honda issues supersessions at specific serial breaks and more than one carburetor variant may apply to these engine families.
Key Features
- OEM Fuel Metering Accuracy — genuine Honda engineering means the main jet sizing, pilot circuit, and needle position match the original calibration for the GX630, GX660, and GX690 engines, restoring correct air-fuel ratio across the throttle range
- Variant-Specific BK05C C Configuration — the (BK05C C) designation is a precise circuit variant; this assembly replaces only that variant, so verify that your existing carburetor carries the matching specification before ordering
- Direct OEM Replacement — sourced directly from Honda, this assembly installs using the original mounting points and hardware with no re-jetting or adaptation required
- Serial Number Matters — Honda supersedes carburetor part numbers at defined serial breaks on the GX630, GX660, and GX690 lines; cross-reference your engine serial number with the fitment table to confirm part number 16100-Z6L-803 is correct for your unit
- Restored Engine Response — a worn or gummed carburetor on these high-output engines causes hard starting, surging, and loss of power under load; a fresh OEM assembly brings throttle response and fuel efficiency back to Honda's original standard
The carburetor is responsible for blending air and fuel in the precise ratio the engine needs to start, idle, and deliver full power across its operating range. On large-displacement horizontal shaft engines like the GX630, GX660, and GX690, the carburetor must meter fuel accurately at both light and heavy loads — any degradation in the needle seat, emulsion tubes, or jets disrupts this balance and shows up as surging, rough idling, or an inability to reach full governed speed. When a carburetor is fouled by stale fuel, worn internally, or damaged, replacing it with the correct OEM assembly is the most reliable way to return the engine to its original operating condition.
Part Details
| Part Number | 16100-Z6L-803 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Carburetor Assembly (BK05C C) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Horizontal Shaft Engine | 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.
