The Multiquip 31100ZE3722 is a genuine OEM Flywheel Complete HC- designed for GX340/390 engine-equipped gasoline arc welders, including the GAW180HEA, GAW180HE1, and GAW180HE models. As a direct OEM replacement, part 31100ZE3722 is manufactured to the same specification as the original component, ensuring accurate fitment and consistent engine performance. This flywheel complete assembly is sourced directly through Multiquip's authorized parts program, making it a trustworthy choice when restoring your welder to full operating condition. Confirm your model code against the GAW180HE series before ordering to ensure compatibility.
Key Features
- Genuine OEM Construction — Manufactured to original specification for the GX340/390 engine, maintaining correct mass, balance tolerance, and ignition timing geometry that aftermarket flywheels may not replicate.
- Direct-Mount Replacement — Engineered to install onto the GX340/390 crankshaft taper with the correct keyway alignment, bolt pattern, and torque specification — no fitting or modification needed.
- Confirmed Fitment for GAW180HE Series — Verified compatible with Multiquip GAW180HEA, GAW180HE1, and GAW180HE gasoline arc welders powered by Honda GX340/390 engines.
- Engine Timing and Charging Integrity — A properly functioning flywheel maintains ignition timing and powers the engine's charging magneto; a worn, cracked, or out-of-balance flywheel leads to hard starting, misfires, and charging system failure.
- Ignition System Safety — A damaged flywheel can cause catastrophic engine failure or electrical faults in arc welding equipment; replacing with a genuine OEM part protects both the operator and the machine.
The flywheel is a heavy rotating mass bolted to the end of the crankshaft. It stores rotational energy to smooth out the power pulses of a single-cylinder engine, keeping it running evenly between firing strokes. On Honda GX340/390 engines used in the GAW180HE series welders, the flywheel also carries the permanent magnets that generate the ignition spark and charge the engine's electrical system. When a flywheel cracks, becomes out of balance, or suffers keyway damage, the result is rough running, ignition failure, or in severe cases, engine seizure — making timely replacement with a correct OEM part critical to safe, reliable operation.
Part Details
| Part Number | 31100ZE3722 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Flywheel Complete HC-5355839 GX340/390 |
Compatibility & Fitment
| Name | Model |
|---|---|
| Welders | GAW180HEA |
| Welders | GAW180HE1 |
| Welders | GAW180HE |
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.
