The Multiquip 43140-54 Starter Relay is a genuine OEM component designed for STXDF and PRX series ride-on power trowels. As a direct OEM replacement, this relay meets the original electrical specifications required by these machines, ensuring correct switching behavior every time the ignition is engaged. Verified fitment covers the STXDF super-sized hydrostatic dual-fuel trowel series and PRX hybrid power float models. Sourced directly through authorized Multiquip distribution channels, this part is backed by the same quality standards as the original.
Key Features
- Correct Electrical Specification — Matched to the OEM coil voltage and contact rating required by STXDF and PRX trowel ignition circuits, so the relay switches at the right threshold every time.
- Drop-In Replacement — Connects directly to the existing wiring harness connector on compatible trowels with no splicing or rewiring needed.
- Confirmed Fitment — Verified for STXDF super-sized hydrostatic dual-fuel and PRX hybrid ride-on power trowel models.
- Protects the Starter Circuit — A functioning relay isolates high-current starter draw from the ignition switch, preventing switch burn-out and protecting downstream electrical components.
- Ignition Safety Function — The starter relay is a critical interlock in the starting circuit; a faulty relay can cause unintended starter engagement or prevent the machine from starting entirely, creating a safety and operational risk on the worksite.
A starter relay acts as an electrically controlled switch between the ignition key and the starter motor. When the operator turns the key, a small signal current from the ignition circuit energizes the relay coil, which closes a set of heavy-duty contacts that allow the high-amperage current required to crank the engine to flow safely. This design protects the ignition switch and wiring from carrying the full starter load. When a starter relay fails — whether through contact wear, coil burnout, or corrosion — the engine will either refuse to crank at all or, in some failure modes, engage the starter unexpectedly, both of which take the machine out of service until the relay is replaced.
Part Details
| Part Number | 43140-54 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Starter Relay |
Compatibility & Fitment
| Name | Model |
|---|---|
| Whiteman Ride-On Power Trowels | STXDF |
| Ride-On Power Float | PRX |
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.
