The Wacker Neuson Throttle Spring is a genuine OEM component designed for the BV50A-P and BV50A-H backpack concrete vibrator series. As a direct OEM replacement, part is produced to the same specifications as the original, ensuring it seats and functions exactly as intended within the throttle assembly. This spring is confirmed compatible across multiple BV50A-P configurations, including SPM4+PH45 and SPM2+PH45 backpack setups, as well as the BV50A-H model.
Key Features
- Genuine OEM Spring Tension: — Manufactured to the original coil rate and free-length specification, so throttle return force matches what the engine and operator control system were engineered around.
- Drop-In Throttle Assembly Fit: — Replaces the original spring in the throttle linkage without rework, retaining the correct attachment points and travel range.
- Broad BV50A Series Coverage: — Compatible with BV50A-P backpack vibrator variants (SPM4+PH45 and SPM2+PH45 configurations) and the BV50A-H, covering a wide range of Wacker Neuson backpack vibrator builds.
- Consistent Throttle Return: — A functioning throttle spring snaps the throttle back to idle the moment the operator releases the control; a fatigued or broken spring can cause the engine to hold at elevated RPM, reducing operator control during concrete consolidation.
- Operator Control Safety: — The throttle spring is a direct part of the engine speed control circuit. Replacing a worn spring restores predictable, immediate throttle response, which is essential for safe operation of a backpack-mounted vibrator in confined or elevated work areas.
The throttle spring provides the return force that pulls the throttle lever or slide back to the idle position when the operator releases the control. Without sufficient spring tension, the engine may not return to idle reliably, leaving the vibrator running at unintended speeds and making it difficult to manage power output during concrete pours. Over time, throttle springs can fatigue, take a set, or break entirely — symptoms include a sticky throttle feel, failure to return to idle, or erratic engine speed — making timely replacement important for both performance and safe machine operation.
Part Details
| Part Number | 5000174874 |
|---|---|
| Old Part Number | 0174874 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Throttle Spring |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Backpack Vibrator | BV50A-P | 5000620399, 5000620764, 5000620767 |
| Backpack Vibrator | BV50A-P EU | 5000620892 |
| BV50A-H | BV50A-H | 5100041314 |
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.
