The Honda 31110-Z4M-950 Flywheel (YUXIN) is a genuine OEM component designed for GX160 horizontal shaft engines, the FC600 tiller, and a range of Honda water pumps including the WB20, WB30, WH15, WH20, WMP20, WT20, and WT30. As a direct Honda OEM part, it is manufactured to the same specification as the original, ensuring correct balance, magnetic pole placement, and dimensional fit on every applicable unit. This flywheel carries the YUXIN variant designation, so confirm your existing flywheel matches before ordering. Always verify your machine's serial number against the fitment table — Honda updates parts at serial breaks, and confirming your serial range is the surest way to order the right component.
Key Features
- Correct Rotating Mass and Balance — manufactured to OEM specification, this flywheel maintains the precise rotational inertia the engine depends on for smooth, consistent power output across its RPM range.
- Integrated Magnets for Charging and Ignition — the flywheel carries the permanent magnets that pass the ignition coil and stator, making its pole spacing and magnetic strength critical to consistent spark timing and battery charging where applicable.
- Broad Cross-Equipment Fitment — fits GX160 horizontal shaft engines, WB20, WB30, WH15, WH20, WMP20, WT20, and WT30 water pumps, and the FC600 tiller; check your model and serial against the fitment table to confirm.
- YUXIN Variant — Match Before You Order — this part carries a variant designation; visually compare it to the flywheel on your unit and verify the part number 31110-Z4M-950 against your machine's Honda parts diagram before purchasing.
- Serial Number Verification Recommended — Honda supersedes flywheel part numbers at production breaks, so cross-reference your machine's serial number with the fitment table to confirm this is the correct replacement for your unit.
The flywheel is a heavy, precision-balanced rotating disc mounted directly to the crankshaft. Its mass stores kinetic energy between power strokes, smoothing out the combustion pulses that would otherwise cause the engine to run roughly. Equally important, the permanent magnets embedded in the flywheel sweep past the ignition coil and stator windings on every revolution, generating the electrical pulse that fires the spark plug and, on equipped models, powers the charging circuit. A flywheel that is cracked, has shed a magnet, or has a damaged taper bore will cause hard starting, misfiring, erratic ignition timing, or complete no-spark failure — any of which will prevent the engine from running reliably.
Part Details
| Part Number | 31110-Z4M-950 |
|---|---|
| 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.
