The Honda 31110-Z4M-900 Flywheel (YUXIN) is a genuine OEM replacement built for GX160 horizontal shaft engines, the FC600 tiller, and a wide range of Honda water pumps including the WB20, WB30, WH15, WH20, WMP20, WT20, and WT30. As a direct Honda OEM component, this flywheel carries the same specifications as the original — no guesswork on fit or function. Confirm your unit's serial number against the fitment table before ordering, as Honda supersedes flywheel part numbers at specific serial breaks and this variant may not cover every build of a listed model.
Key Features
- Genuine Honda OEM Component — sourced directly from Honda, this flywheel meets the same specifications as the part that left the factory on your engine or pump unit, ensuring correct balance and ignition timing alignment.
- YUXIN Variant — the YUXIN designation identifies a specific flywheel variant; match it to your existing part to confirm you are ordering the correct version for your unit.
- Broad Equipment Compatibility — fits GX160 horizontal shaft engines, the FC600 tiller, and Honda WB20, WB30, WH15, WH20, WMP20, WT20, and WT30 water pumps.
- Serial Number Verification Recommended — Honda issues flywheel supersessions at defined serial ranges; check your machine's serial number against the fitment table to confirm this part covers your build.
The flywheel is a heavy rotating disc mounted directly to the crankshaft. As the crankshaft turns, the flywheel stores rotational energy and releases it between power strokes, keeping the engine spinning smoothly at consistent speed rather than surging or stalling. Embedded magnets in the flywheel pass the ignition coil on every revolution, generating the electrical pulse that fires the spark plug at precisely the right moment. A flywheel that is cracked, damaged, or has weakened magnets will produce weak or erratic spark, leading to hard starting, misfires, or a complete no-start condition — restoring a serviceable flywheel brings ignition timing and smooth power delivery back to spec.
Part Details
| Part Number | 31110-Z4M-900 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Flywheel (YUXIN) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Horizontal Shaft Engine | GX160 | All |
| Tiller | FC600 | 1759534-9999999 |
| Water Pump | WH15, WH20 | 3287075-9999999 |
| Water Pump | WB20, WB30 | 3288726-9999999 |
| Water Pump | WMP20, WT20, WT30 | 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.
