Wacker Neuson 0400021 Engine Honda GX160UH2 SWX2

The Wacker Neuson 0400021 Engine Honda GX160UH2 SWX2 is a genuine OEM powerplant designed for the WPU1550AW and WPU1550A series reversible vibratory plate compactors. As a direct Honda GX160UH2 SWX2 engine assembly, part 0400021 delivers the correct shaft configuration, mounting dimensions, and output spec required by these BPU-class machines. This is the factory-specified engine sourced directly through Wacker Neuson, ensuring a correct, no-compromise fit for your compactor. Whether you are rebuilding after a failure or planning a scheduled power unit replacement, the part is the right engine for the job.

Key Features

• Honda GX160UH2 SWX2 Configuration — The SWX2 shaft and recoil start configuration is factory-matched to the WPU1550 drive system, ensuring the engine connects directly to the exciter unit without adaptation.
• Broad WPU1550 Series Coverage — Fits WPU1550AW-US, WPU1550AW, WPU1550A-US, and WPU1550A reversible plate compactors, covering both domestic and international production variants.
• Restored Compaction Power — A failed or worn engine on a reversible plate compactor leads to loss of centrifugal force and compaction depth. Replacing with the correct this part restores full plate travel and compactive effort.
• Fuel System and Ignition Integrity — As a complete engine assembly, the Honda GX160UH2 SWX2 includes the carburetor, ignition, and fuel system components pre-assembled, simplifying the swap and restoring safe, reliable starting behavior.

The engine is the core power source of a reversible vibratory plate compactor, driving the eccentric shaft assembly that generates the high-frequency vibration needed to compact soil and aggregate. On the WPU1550 series, the Honda GX160UH2 SWX2 transmits power through a centrifugal clutch to the exciter housing, producing the forward and reverse plate movement that makes these machines effective in trenches and confined areas. When the engine degrades — through wear, overheating, or mechanical failure — compaction performance drops off immediately, and continued operation risks damage to the exciter and drive components downstream.

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.