The Multiquip 22900 is a genuine OEM Honda GX120 Tier 3 (3.5 HP) engine designed for Whiteman walk-behind power trowel models CA4HM, CA4HC, and CA5BC. As a direct OEM replacement sourced through Multiquip's authorized parts program, the 22900 delivers the correct power output and emissions compliance your trowel requires. This engine is the exact unit specified for these machines, ensuring a direct swap with no adaptation to mounting points, throttle linkage, or drive components. If your current engine has lost compression, failed to start reliably, or sustained damage beyond repair, the Multiquip 22900 is the correct path back to full operation.
Key Features
- Genuine OEM Honda Power Plant — The GX120 is Honda's proven overhead-valve small engine, delivering consistent torque output at the RPM range these walk-behind trowels demand for blade speed control.
- Tier 3 Emissions Certified — Meets current Tier 3 exhaust emission standards, keeping your equipment compliant for use on regulated jobsites and in emissions-controlled work zones.
- Direct Bolt-In Replacement — Engineered to match the original engine mounting pattern, shaft dimensions, and throttle linkage interface on CA4HM, CA4HC, and CA5BC trowels.
- Correct Fitment for CA Series Trowels — Verified for Whiteman CA4HM, CA4HC, and CA5BC walk-behind power trowels — the 36-inch trowel platforms in the Multiquip Whiteman lineup.
- Sustained Blade Speed and Finishing Quality — A properly running GX120 maintains the consistent RPM needed for even blade pitch and smooth concrete finishing; a worn or failing engine causes uneven trowel pressure and poor surface results.
The Honda GX120 is a 4-stroke, overhead-valve gasoline engine that serves as the primary power source on these walk-behind trowels, driving the gearbox that rotates the finishing blades. It delivers the torque needed to maintain steady blade speed under the load of fresh concrete, which is critical for achieving a uniform surface finish. When this engine degrades — through compression loss, carburetor failure, or internal wear — blade RPM becomes inconsistent, finishing quality suffers, and the machine may become unreliable or impossible to start.
For fitment questions or to confirm this part is correct for your serial number range, contact the DHS Equipment parts team directly.
Part Details
| Part Number | 22900 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Engine Honda GX120 Tier 3 (3.5 HP) |
Compatibility & Fitment
| Name | Model |
|---|---|
| Whiteman Walk-Behind Power Trowels | CA4HM |
| Whiteman Walk-Behind Power Trowels | CA4HC/CA5BC |
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.
