The Wacker Neuson Piston Complete is a genuine OEM component designed for PTS4V series centrifugal trash pumps and the GPS8500 and GS8.5V portable generators. Sourced directly from Wacker Neuson, part number is engineered to meet the same specifications as the original part installed at the factory. Confirmed fitment spans multiple PTS4V pump variants — including the PTS4V(I) — as well as the GPS8500 and GS8.5V generator platforms, making this a dependable choice across several Wacker Neuson machines running compatible engines.
Key Features
- Genuine OEM Construction: — Manufactured to original bore diameter and ring-groove tolerances, ensuring correct compression and sealing performance in the engine cylinder.
- Drop-In Engine Replacement: — Matches the original piston profile and pin configuration for direct installation without machining or modification to the cylinder bore.
- Broad Fitment Coverage: — Compatible with PTS4V, PTS4V(I), GPS8500, and GS8.5V models, covering both the 100mm/4-inch centrifugal trash pump and portable generator product lines.
- Restored Power and Compression: — A worn or scored piston causes loss of compression, increased oil consumption, and rough running; replacing with 5000208198 restores full engine output and smooth operation.
- Fuel System Integrity: — Correct piston fit maintains proper air-fuel compression ratios, supporting reliable combustion and preventing unburned fuel from contaminating the crankcase oil.
The piston is the reciprocating component inside the engine cylinder that converts combustion pressure into mechanical motion. It travels up and down within the cylinder bore, compressing the air-fuel mixture on the upstroke and transferring the force of ignition through the connecting rod to the crankshaft. When a piston becomes worn, cracked, or scored — typically from heat, debris ingestion, or lubrication failure — compression drops, power output falls, and the engine may begin burning or leaking oil. Replacing the piston assembly with a correctly spec'd part like the Wacker Neuson 5000208198 Piston Complete restores the engine's compression seal and brings performance back to operating standard.
Part Details
| Part Number | 5000208198 |
|---|---|
| Old Part Number | 0208198 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Piston Complete |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| 100mm/4in Centrifugal Trash Pu mp | PTS4V | 5000007691, 5000007683, 5000620971, 5100031221 |
| Portable Generator with Electr ic Start | GPS8500 | 5000008286 |
| Portable Generator with Electr ic Start | GS8.5V | 5000007661 |
| PTS4V(I) Pump | PTS4V(I) | 5000620972 |
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.
