Wacker Neuson 5100000367 Piston

The Wacker Neuson Piston is a genuine OEM Piston designed for a wide range of Wacker Neuson equipment including the BFS940, GV5000A, GV5003A, BPU 3050A, BPU 3750Ats, BPU 4045A, and BFS 914A and BFS 940A floor saw series. As a factory-sourced component, part is manufactured to the exact specifications of the original, ensuring a correct fit and consistent engine performance across every compatible model. This piston covers an extensive fitment range spanning portable generators, vibratory plates, and gasoline-powered floor saws, making it a versatile and high-demand service part. When it is time to rebuild or restore engine compression, this is the part to order.

Key Features

• OEM Compression Geometry — Machined to the exact bore dimensions and crown profile of the original, ensuring correct compression ratios are maintained in compatible engines.
• Drop-In Engine Replacement — Engineered to install directly into the cylinder bore with no re-boring or adaptation, using the same pin diameter and ring groove configuration as the factory part.
• Broad Fitment Across Three Equipment Categories — Compatible with BFS floor saws, GV portable generators, and BPU vibratory plates, covering over 20 Wacker Neuson model configurations with a single part number.
• Restores Full Power Output — A worn or scored piston causes loss of compression, hard starting, and reduced engine power; replacing it with this genuine OEM part brings combustion efficiency back to spec.
• Fuel System Integrity — Correct piston-to-wall clearance prevents blow-by, protecting the oil from fuel contamination and extending the service life of rings, cylinder walls, and the entire lower end assembly.

The piston is the reciprocating heart of a four-stroke gasoline engine — it converts the force of combustion into the rotational movement that powers the machine. Seated inside the cylinder bore, it seals the combustion chamber during the compression and power strokes, and its condition directly determines how much usable power the engine develops. When a piston becomes worn, cracked, or scored, compression drops, fuel consumption rises, and the engine may smoke, run roughly, or fail to start — making timely replacement critical to keeping equipment operational and protecting surrounding engine components from further damage.

Part Details

Compatibility & Fitment

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.