Multiquip 22624 Engine Honda GX390 (13HP)

The Multiquip 22624 Engine Honda GX390 (13HP) is a genuine OEM power unit designed for HDA-Series Whiteman walk-behind power trowels. This is a direct OEM replacement sourced through Multiquip's authorized parts program, ensuring the engine you receive meets the exact specifications of the original unit installed at the factory. Compatible with HDA-Series walk-behind trowels, the 22624 restores the full 13HP output your machine depends on for consistent blade speed and finishing performance. DHS Equipment supplies this part as a verified Multiquip OEM component, so you can install with confidence.

Key Features

• Genuine OEM Honda GX390 Engine — An authentic Multiquip-sourced replacement that matches the original engine's 13HP output rating and mounting configuration exactly as specified for the HDA-Series.
• Direct-Mount Replacement — Engineered to bolt into the existing HDA-Series trowel frame using the factory mounting points, keeping the swap straightforward for experienced operators and mechanics.
• HDA-Series Fitment — Confirmed for Whiteman HDA-Series walk-behind power trowels; verify your model and serial number against Multiquip's parts documentation before ordering.
• Full 13HP Power Restoration — A worn, seized, or damaged engine robs the trowel of blade torque and finishing consistency; replacing with the correct 22624 unit brings output back to the original operating spec.
• Fuel System Integrity — The Honda GX390 is designed with a float-style carburetion system; installing a properly matched OEM engine avoids fuel delivery mismatches that can result from using incompatible substitute powerplants.

The engine is the core power source of a walk-behind power trowel, driving the gearbox that rotates the finishing blades across freshly poured concrete slabs. On HDA-Series trowels, the Honda GX390 delivers the torque needed to maintain consistent blade speed under load, which directly affects the quality and smoothness of the finished surface. When an engine loses compression, burns oil, or fails to start reliably, the entire finishing operation is compromised — replacing the engine assembly is often the most effective path to restoring full productivity on a heavily used machine.

For questions about fitment or to confirm this part is correct for your specific HDA-Series trowel configuration, contact the DHS Equipment parts team before ordering.

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.