Multiquip 21422 Engine Kohler 28HP EFI

The Multiquip 21422 Engine Kohler 28HP EFI is a genuine OEM engine assembly designed for HTN27K and HTN28K Whiteman ride-on mechanical power trowels. As a direct Multiquip OEM part, the 21422 is built to the exact specification of the original engine, ensuring a correct installation with no guesswork on compatibility. This is a complete engine replacement sourced directly through the Multiquip OEM supply chain, making it the right choice when a full engine swap is required on your HTN-series trowel. Confirm your model code against HTN27K or HTN28K before ordering to ensure this is the correct unit for your machine.

Key Features

• OEM-Grade Engine Output: — Delivers the same 28HP EFI Kohler power output as the original factory-installed engine, maintaining the full drive and blade performance your HTN-series trowel depends on.
• Fuel-Injected Kohler Platform: — The EFI (Electronic Fuel Injection) system provides consistent fuel delivery across varying temperatures and elevations, supporting stable engine operation on the jobsite.
• Direct-Fit for HTN-Series Trowels: — Engineered specifically for the HTN27K and HTN28K mechanical ride-on trowels, matching original mounting points, shaft dimensions, and electrical connections.
• Genuine Multiquip OEM Part: — Sourced directly through Multiquip's authorized parts supply, this engine carries the OEM designation, meaning it meets the same standards as the unit it replaces.
• Restores Full Machine Capability: — A failed or worn engine on a ride-on trowel brings finishing work to a halt; replacing with the correct OEM unit gets your HTN27K or HTN28K back to full operating capacity.
• Verified Part Number Fit: — Part number 21422 is confirmed for HTN27K and HTN28K applications — cross-reference your model plate before ordering to validate fitment for your specific unit.

The engine is the core power source of a ride-on mechanical trowel, driving the transmission and blade rotation that allows the machine to finish large concrete slabs efficiently. On HTN-series trowels, the Kohler EFI engine powers the mechanical drivetrain that controls both trowel blade speed and the machine's self-propelled movement across the slab. When the engine loses power, runs rough, or fails entirely, finishing work stops — replacing it with the correct OEM unit restores the machine to its original operating condition and ensures the drivetrain receives the torque and RPM it was designed to run on.

For questions about part 21422 or fitment confirmation for your HTN27K or HTN28K, contact the DHS Equipment parts team for assistance.

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.