The Wacker Neuson is a genuine OEM Flywheel Housing designed for the PG3A, G2.1A, G2.1AE, G2.5A, and G5.7AE portable generator series. As a direct factory replacement, this housing is manufactured to the exact tolerances required for proper flywheel alignment and engine enclosure integrity on these Wacker Neuson generators. Sourcing the genuine OEM part ensures you get the correct mounting geometry, bolt pattern, and material spec — no guesswork on fitment across the supported generator models.
Key Features
- Genuine OEM Structural Integrity — Cast and machined to exact dimensional specs, ensuring the flywheel housing maintains correct concentricity between the engine block and flywheel assembly — critical for smooth, vibration-free generator operation.
- Direct Bolt-On Replacement — Matches the original mounting face, bolt hole pattern, and register diameter of the factory unit, allowing straightforward installation without machining or adaptation.
- Broad Generator Series Coverage — Confirmed fitment across the PG3A, G2.1A, G2.1AE, G2.5A, and G5.7AE portable generator models, covering both 50Hz variants and standard portable configurations.
- Protects Engine and Rotating Components — The flywheel housing shields internal rotating parts from debris and mechanical contact while providing the structural bridge between the engine and any attached driven equipment or recoil/starter systems.
- Electrical System Alignment — Correct housing alignment is essential for maintaining the precise air gap between the flywheel magnets and the stator — a misaligned or damaged housing can directly cause charging or ignition output issues.
The flywheel housing is a structural engine enclosure that surrounds and protects the flywheel — the heavy rotating disc that stores rotational energy and keeps the engine running smoothly between power strokes. Beyond protection, the housing serves as a precision register: it aligns the flywheel concentrically with the crankshaft and any attached starter or alternator components. On portable generators like the G2.1A and G2.5A series, this alignment is especially important because the flywheel also carries the magnets that drive the stator for power output. A cracked, warped, or damaged flywheel housing can cause vibration, misalignment of the charging system, or starter engagement problems — making prompt replacement essential to restoring safe and reliable generator output.
Part Details
| Part Number | 5000081999 |
|---|---|
| Old Part Number | 0081999 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Flywheel Housing |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| PG3A | PG3A | 5000007659, 5000009055 |
| 50Hz Portable Generator | G2.1AE | 5000008250, 5000008244, 5000008246, 5000008248 |
| 50Hz Portable Generator | G2.1A | 5000008249, 5000008243, 5000008245, 5000008247 |
| Portable Generator | G2.5A | 5000007188, 5000009256 |
| 50Hz Portable Generator | G5.7AE | 5000009017 |
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.
