The Wacker Neuson WM 90 Engine is a genuine OEM power unit designed for the BS500-4 and BS600-4 vibratory rammers. As a direct factory replacement, this engine is sourced from Wacker Neuson and built to the same specification as the unit that left the factory floor, ensuring full compatibility with the 280mm/11-inch shoe rammer platform. If your BS500-4 or BS600-4 has lost power, runs rough, or won't start, swapping in the correct OEM engine gets your machine back to full compaction performance without compromise.
Key Features
- Genuine OEM Engine Assembly — Sourced directly from Wacker Neuson, this WM 90 Engine meets the exact output, displacement, and mounting specifications required for the BS rammer platform — no guesswork on compatibility.
- Drop-In Replacement for BS500-4 and BS600-4 — Engineered to bolt directly into the BS500-4 and BS600-4 rammer chassis, with matching mounting points, throttle linkage connections, and recoil starter orientation.
- Restores Full Compaction Force — A correctly specified engine drives the rammer's eccentric mechanism at the designed stroke rate, delivering the impact energy needed to compact cohesive soils and trench backfill to spec.
- Prevents Costly Knock-On Damage — Running a worn or underpowered engine stresses the drive train and eccentric assembly. Replacing the engine promptly protects the surrounding drivetrain components from accelerated wear.
- Fuel System Integrity — As a complete OEM engine unit, the WM 90 includes correctly rated fuel and ignition components, keeping the fuel system operating within safe design parameters on a gasoline-powered rammer.
The WM 90 Engine is the heart of the BS500-4 and BS600-4 vibratory rammers, providing the rotational power that drives the internal eccentric mechanism responsible for producing the machine's up-and-down jumping action. Without a properly functioning engine, the rammer cannot generate the impact force needed to effectively compact cohesive soils, clay, or trench backfill. A failing engine typically presents as loss of power, difficulty starting, or erratic stroke behavior — all of which directly reduce compaction output and can bring trench work or utility installation to a halt.
Part Details
| Part Number | 5000155224 |
|---|---|
| Old Part Number | 0155224 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | WM 90 Engine |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Vibratory Rammer, 280mm/11in S hoe | BS500-4 | 5000009329 |
| Vibratory Rammer, 280mm/11in S hoe | BS600-4 | 5000009331 |
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.
