The Honda 31110-Z3E-004 Flywheel is a genuine OEM replacement designed for GX25 horizontal shaft engines, FG110 tillers, HHT25 trimmers, and UMC425 trimmers. As a direct Honda OEM component, this flywheel is manufactured to the same specifications as the original, ensuring proper ignition timing and engine balance on every start. Confirm your unit's serial number against the fitment table before ordering, as Honda supersedes parts at production breaks and multiple serial ranges share these models.
Key Features
- Genuine Honda OEM Part — sourced directly from Honda, this flywheel matches the original in geometry and magnetic pole arrangement, which are critical to correct ignition timing on small-displacement engines.
- Ignition Timing Integrity — the flywheel's magnetic rotor triggers the ignition coil at precisely the right crankshaft position; a worn or damaged flywheel causes misfires, hard starting, or complete no-start conditions.
- Broad Fitment Across Honda's Mini 4-Stroke Line — fits GX25 horizontal shaft engines, the FG110 tiller, HHT25 trimmers, and UMC425 trimmers, including a range of equipment powered by Honda's compact engine platform.
- Check Your Serial Number — Honda issues part supersessions at serial-number breaks, so verify your machine's serial number against the compatibility table to confirm this is the correct flywheel for your unit.
The flywheel is a heavy rotating disc mounted directly to the crankshaft. On small Honda engines, it serves two essential roles: its mass smooths out the power pulses of each combustion cycle to keep the engine running evenly, and the magnets embedded in its rim pass the ignition coil at a precise point in each revolution to generate the spark that fires the cylinder. A cracked, damaged, or magnetically weakened flywheel disrupts both functions — causing rough running, weak spark, or a complete failure to start. Replacing a faulty flywheel with a genuine Honda part restores the correct timing relationship between the crankshaft and the ignition system, returning the engine to its original performance.
Part Details
| Part Number | 31110-Z3E-004 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Flywheel |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Horizontal Shaft Engine | GX25 | All |
| Tiller | FG110 | All |
| Trimmer | UMC425 | 3016121-9999999 |
| Trimmer | HHT25 | 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.
