The Multiquip 21649 Throttle Lever STX is a genuine OEM throttle lever designed for Whiteman hydrostatic ride-on power trowels, including the HTX44Y4, HTX44Y5, STX55J6, and STX55Y6. As a direct OEM replacement, part 21649 is built to the same specification as the original component, ensuring proper fit and consistent operator control. Sourced directly through authorized Multiquip supply channels, this lever is the correct-specification part for HTX44 and STX55 series machines.
Key Features
- Genuine OEM Construction — Manufactured to the original throttle lever specification, ensuring the correct pivot feel, engagement range, and mechanical response expected on Whiteman ride-on trowels.
- Direct Replacement for HTX44 and STX55 Series — Confirmed fitment for HTX44Y4, HTX44Y5, STX55J6, and STX55Y6 models; installs in the original lever position without adaptation.
- Consistent Engine Speed Control — A properly functioning throttle lever allows the operator to maintain precise RPM across finishing passes; a worn or loose lever leads to inconsistent blade speed and uneven surface finish.
- Durable Lever Mechanism — Built to withstand repeated operator inputs in demanding concrete finishing environments where lever fatigue and wear are common service issues.
- Verified Part Number — Order with confidence using Multiquip part number 21649 to match the correct lever variant for your HTX44 or STX55 trowel.
The throttle lever on a ride-on power trowel gives the operator direct control over engine speed, which in turn governs blade rotation and finishing pressure across the concrete surface. When the lever wears, binds, or breaks, the operator loses the ability to make precise speed adjustments, resulting in inconsistent blade action and potentially compromised slab finish quality. Replacing a damaged or worn lever with the correct OEM part restores full throttle response and keeps the machine operating as intended.
For questions about fitment or to confirm this is the right part for your machine, contact the DHS Equipment parts team.
Part Details
| Part Number | 21649 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Throttle Lever STX |
Compatibility & Fitment
| Name | Model |
|---|---|
| Whiteman Ride-On Power Trowels | HTX44Y4 |
| Whiteman Ride-On Power Trowels | HTX44Y5 |
| Whiteman Ride-On Power Trowels | STX55J6 |
| Whiteman Ride-On Power Trowels | STX55Y6 |
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.
