The Honda 17631-Z4H-800 Fuel Filler Cap Gasket (39X62X3) is a genuine OEM replacement designed for GX120, GX160, GX200, GX240, GX270, GX340, and GX390 horizontal shaft engines, the EG5000 generator, and the FC600 tiller. As a direct Honda OEM part, it is manufactured to the same specification as the original, ensuring a proper seal at the fuel tank opening. Always confirm your unit's serial number against the fitment table before ordering, as Honda supersedes parts at production breaks and this gasket carries a specific size designation — 39X62X3 — that should be matched to your machine's requirements.
Key Features
- OEM Sealing Integrity — manufactured to Honda's original specification, this gasket delivers the same compression and fuel resistance as the part it replaces, maintaining a tight seal under the fuel filler cap.
- Size-Specific Variant — dimensioned at 39X62X3, this is a specific size variant; verify this matches your unit's cap and tank before purchasing, particularly if multiple gasket listings are available for your model.
- Broad Fitment — covers GX120, GX160, GX200, GX240, GX270, GX340, and GX390 horizontal shaft engines, the EG5000 generator, and the FC600 tiller, making it a widely applicable service part.
- Serial Number Verification — Honda updates parts at serial breaks, so cross-reference your machine's serial number with the fitment table to confirm this is the correct gasket for your production run.
The fuel filler cap gasket sits between the fuel tank opening and the filler cap, forming a fuel-tight seal that prevents leaks and keeps debris out of the tank. When this gasket hardens, cracks, or compresses beyond recovery, the cap can no longer seal properly — leading to fuel weeping around the cap or contamination entering the tank. Replacing a worn gasket with the correct OEM part restores the seal and protects the fuel system from both leakage and ingress of dirt or moisture.
Part Details
| Part Number | 17631-Z4H-800 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Fuel Filler Cap Gasket (39X62X3) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Generator | EG5000 | 1000001-4117421 |
| Horizontal Shaft Engine | GX200 | 1038716-1040869, 1377259-1411432 |
| Horizontal Shaft Engine | GX270 | 1140619-1172734, 1204807-1210488 |
| Horizontal Shaft Engine | GX120 | 1143464-1150470, 1188058-1206680 |
| Horizontal Shaft Engine | GX340 | 1161429-1167471 |
| Horizontal Shaft Engine | GX160 | 1191179-1206095, 1991088-2125381 |
| Horizontal Shaft Engine | GX240 | 1201675-1206823 |
| Horizontal Shaft Engine | GX390 | 1372504-1422261, 1530149-1552033 |
| Tiller | FC600 | 1456759-1492045 |
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.
