The Wacker Neuson Piston Ring Set (0.50) is a genuine OEM component designed for the GP3800A and GP3800 series portable generators. As a factory-sourced part, it carries the exact dimensions and material specification required for a correct, leak-free installation in these units — covering standard, premium, and wheel-kit-equipped configurations alike. Whether you are servicing a standard GP3800A or a wheel-kit model, this oversize ring set delivers the precise fit the engine needs to return to full compression and reliable output. Confirm your model number against the fitment list before ordering to ensure this 0.50mm oversize set matches your engine's bore condition.
Key Features
- OEM Ring Geometry and Material Grade — Sourced directly from Wacker Neuson, this ring set is manufactured to the exact radial thickness, end-gap tolerance, and ring-face profile specified for the GP3800A/GP3800 engine, ensuring consistent cylinder sealing across the compression and oil-control rings.
- 0.50mm Oversize for Bored or Worn Cylinders — Sized at 0.50mm over standard, this set is the correct match for engines that have been rebored or measured to the first oversize specification — drop-in ready once the cylinder is properly prepared.
- Broad GP3800A and GP3800 Series Coverage — Fits standard portable, premium portable, EPA-compliant, CSA-compliant, and wheel-kit configurations across the GP3800A and GP3800 generator families.
- Restores Full Compression and Oil Control — Worn or broken piston rings allow combustion gases to bypass the piston and oil to enter the combustion chamber, causing power loss, high oil consumption, and hard starting. A fresh ring set brings compression back within spec and stops oil burning.
- Supports Long Engine Service Life After Rebuild — Using the correct OEM oversize ring set during a bore-and-rebuild service ensures the piston assembly seats properly through the break-in period, protecting the engine investment for the long term.
Piston rings seal the gap between the piston and the cylinder wall, performing two critical jobs: containing the high-pressure combustion gases above the piston so they push it downward with full force, and controlling the thin film of oil on the cylinder wall so it lubricates without being burned. Over time, rings wear, lose tension, or break — symptoms show up as low compression readings, excessive oil consumption, blue exhaust smoke, or an engine that is hard to start and runs roughly. Replacing the ring set with a correctly sized oversize set, such as this 0.50mm unit, restores the tight seal the engine needs and is a standard step in any cylinder bore-and-rebuild procedure.
Part Details
| Part Number | 5000217429 |
|---|---|
| Old Part Number | 0217429 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Piston Ring Set (0.50) |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Portable Generator | GP3800A | 5000620104, 5000620379, 5000620485, 5000620342, 5000620484 |
| GP3800A Generator, EPA | GP3800 | 5000620974, 5000620975, 5000620976 |
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.
