The Honda 16855-Z6C-842 Fuel Tube B (FKM) is a genuine OEM fuel tube designed for GX610, GX620, and GX670 horizontal shaft engines and GXV610, GXV620, and GXV670 vertical shaft engines. As a direct OEM replacement, this tube meets Honda's original specifications for the large-displacement 600–670 cc twin-cylinder engine families. Confirm your engine's serial number against the fitment table before ordering, as Honda supersedes fuel system components at serial breaks within a model series.
Key Features
- FKM Construction — the (FKM) designation identifies this as a fluoroelastomer fuel tube, a material chosen specifically for its resistance to fuel degradation in Honda's twin-cylinder fuel delivery circuits
- Genuine OEM Part — sourced directly from Honda, part number 16855-Z6C-842 matches the original tube in dimensions and compound, so no trimming or adaptation is needed
- Broad Twin-Cylinder Fitment — covers GX610, GX620, and GX670 horizontal shaft engines as well as GXV610, GXV620, and GXV670 vertical shaft engines; verify your serial number to confirm the correct variant for your unit
- Fuel Delivery Integrity — a cracked, hardened, or swollen fuel tube causes fuel starvation, rough running, or fuel leaks; replacing it with this OEM tube restores consistent fuel flow to the carburetor
A fuel tube carries fuel from one point in the engine's fuel delivery system to another — in this case, serving as the "B" routing segment in Honda's twin-cylinder fuel circuit. Over time, fuel tubes can harden, crack, or swell as the elastomer reacts to ethanol-blended fuels and heat cycling. When a fuel tube degrades, the engine may run lean, surge, stall, or develop a fuel leak at the connection points. Replacing the tube with this FKM-compound OEM part restores a secure, fuel-tight connection and keeps the carburetor supplied with a steady, consistent fuel flow.
Part Details
| Part Number | 16855-Z6C-842 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Fuel Tube B (FKM) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Horizontal Shaft Engine | GX610, GX620 | 1002961-9999999 |
| Horizontal Shaft Engine | GX670 | 1035450-9999999 |
| Vertical Shaft Engine | GXV670 | 1000369-9999999 |
| Vertical Shaft Engine | GXV610, GXV620 | 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.
