The Wacker Neuson Flywheel is a genuine OEM component designed for the G40 and G50 series portable generators. Sourced directly from Wacker Neuson, this flywheel is manufactured to the exact specifications required by the G40 and G50 generator families, including G40 50Hz LATAM Premium and Mobile Generator variants. As a genuine OEM part, it delivers the precise rotational mass, balance tolerancing, and interference fit needed to maintain stable engine operation across all rated load conditions. If your generator is exhibiting rough running, misfires, or inconsistent output, a worn or damaged flywheel may be the cause — replacing it with part number restores proper engine timing and power delivery.
Key Features
- Precision Rotational Balance — Manufactured to OEM balance specifications, ensuring smooth engine operation and consistent electrical output under variable load.
- Direct OEM Replacement — Engineered to the same interference fit and mounting interface as the original, allowing straightforward installation on G40 and G50 generator engines.
- Broad G-Series Fitment — Confirmed fit across the G40 and G50 generator families, including Mobile Generator and G40 50Hz LATAM Premium configurations.
- Stable Power Output — A correctly seated flywheel maintains proper ignition timing, which is essential for consistent voltage and frequency delivery from the generator.
- Genuine Wacker Neuson OEM Quality — Produced to the same material and dimensional standards as the part it replaces, maintaining the integrity of the engine assembly.
The flywheel is a heavy rotating disc mounted directly to the engine crankshaft. Its mass stores rotational energy between power strokes, smoothing out the pulses of combustion to deliver consistent crankshaft speed — which, in a generator, directly affects the stability of voltage and frequency output. The flywheel also typically carries the ring gear for the starter and the magneto trigger targets for the ignition system. When a flywheel is cracked, out of balance, or has damaged ring gear teeth, the result can range from hard starting and rough running to complete failure to start or erratic electrical output.
Part Details
| Part Number | 5200021116 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Flywheel |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Generator | G40 | 5200015906, 5200016640, 5100029184, 5200015907 |
| Generator | G50 | 5200015909 |
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.
