Wacker Neuson 5200022193 Engine Honda GX390 SXQ4

The Wacker Neuson Engine Honda GX390 SXQ4 is a genuine OEM engine designed for the RD7 and RD7A Tandem Roller series. Sourced directly from Wacker Neuson, this replacement engine carries the same specifications as the original unit installed at the factory, ensuring a straightforward swap with no guesswork on compatibility. Part number is confirmed for the RD7A Tandem Roller across multiple build configurations, making it the right choice when a full engine replacement is required to get your compaction equipment back in service.

Key Features

• Genuine OEM Engine Output Spec — Matches the original Honda GX390 SXQ4 displacement, compression, and power output required to drive the RD7A Tandem Roller's compaction system at the correct operating capacity.
• Drop-In Engine Replacement — Retains the same mounting footprint, shaft configuration, and ancillary connection points as the original, allowing direct installation without adapting hardware or modifying the frame.
• Confirmed Fitment for RD7 and RD7A Series — Verified for the RD7 Tandem Roller and RD7A Tandem Roller across multiple model configurations including build numbers 5100017196, 5200015243, and 5200015246.
• Full Power Restored to Compaction Performance — A healthy GX390 engine delivers consistent drum rotation speed and vibration output; a worn or failed engine results in loss of compaction force, stalling under load, and uneven surface results.
• Fuel System Integrity — As the primary fuel-burning component, using the correct OEM engine assembly ensures proper carburetion, choke function, and governor response — critical for consistent throttle control on grade work and confined-area compaction.

The Honda GX390 SXQ4 is a four-stroke, air-cooled gasoline engine that serves as the primary power source for the RD7A Tandem Roller, driving the hydraulic system that controls drum rotation, vibration frequency, and propulsion. When the engine is running correctly, it delivers steady power output that allows the roller to maintain consistent compaction passes across asphalt and aggregate surfaces. A failing or damaged engine will typically present as loss of power under load, hard starting, excessive oil consumption, or complete failure to run — any of which will take the machine out of service until the engine is replaced.

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.