The Wacker Neuson Piston.25 is a genuine OEM component designed for the GP5600A and GPS5600A series portable generators. As a direct factory replacement, this part is manufactured to the same specifications as the original, ensuring a correct fit without guesswork. It covers a wide range of GP5600A and GPS5600A configurations including standard, wheel kit, electric start, CARB GFI, and CAN GFI variants. When you need confidence in your repair, sourcing the genuine OEM part is the straightforward choice.
Key Features
- Genuine OEM Dimensional Accuracy — Manufactured to match original bore tolerances exactly, ensuring the correct compression seal and ring-land geometry for this engine application.
- Drop-In Engine Replacement — Designed to install directly into the existing cylinder bore of compatible GP5600A and GPS5600A engines with no reworking of the block required.
- Broad GPS5600A & GP5600A Coverage — Fits multiple build variants across both model families, including standard, wheel kit, electric start, CARB GFI, and CAN GFI configurations.
- Restored Compression and Power Output — A worn or damaged piston causes compression loss, misfiring, and reduced generator output; replacing it restores the engine's ability to deliver its rated wattage consistently.
- Fuel System Integrity — A correctly fitted piston maintains proper combustion chamber sealing, preventing unburned fuel from bypassing into the crankcase and protecting engine oil quality.
The piston is the reciprocating component at the heart of a four-stroke engine, converting the force of combustion into the rotational movement that drives the generator's alternator. It travels up and down inside the cylinder bore, compressing the air-fuel mixture on the upstroke and transferring combustion energy to the crankshaft via the connecting rod on the power stroke. When a piston wears, cracks, or scores, compression drops, oil consumption rises, and the engine can no longer produce consistent power — making timely replacement critical to keeping a generator performing at its rated output.
Part Details
| Part Number | 5000217436 |
|---|---|
| Old Part Number | 0217436 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Piston .25 |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| GPS5600A,CAN GFI | GPS5600A | 5000620096, 5000620383, 5000620328, 5000620981 |
| Premium Portable Generator | GP5600A | 5000620094, 5000620095, 5000620326, 5000620327, 5000620381, 5000620382 |
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.
