The Wacker Neuson Idle Speed Screw is a genuine OEM component designed for the PT3 series self-priming centrifugal trash pumps. As a direct OEM replacement, this screw is sourced from Wacker Neuson and built to the exact specification of the original part — giving you a confident, no-guesswork repair. The is confirmed to fit the PT3, PT3 Pump, and 75mm/3in Centrifugal Trash Pump configurations within the PT3 family.
Key Features
- Genuine OEM Throttle Calibration: — Manufactured to exact OEM tolerances, this idle speed screw delivers the precise thread engagement needed for accurate carburetor idle adjustment on PT3 engines.
- Drop-In Replacement for PT3 Applications: — Engineered to seat and thread into the existing carburetor assembly exactly as the factory part, with no rework or adaptation to the housing required.
- PT3 Series Compatibility: — Verified for PT3 Pump, PT3, and 75mm/3in Centrifugal Trash Pump variants — covering the full PT3 model range in a single part number.
- Restore Stable Idle Performance: — A worn or damaged idle speed screw causes erratic idle, stalling, or inability to hold a set RPM; replacing it restores consistent low-speed engine control and smooth pump operation.
- Fuel System Integrity: — Correct idle adjustment is critical for safe, efficient fuel delivery at low throttle — an improperly set or damaged screw can lead to over-fueling or lean-running conditions at idle.
The idle speed screw is a small but critical adjustment component in the carburetor assembly. It controls the minimum throttle position, setting the engine's baseline RPM when the operator releases the throttle. When this screw is worn, stripped, or missing, the engine loses the ability to hold a stable idle — leading to stalling, rough running, or difficulty maintaining consistent pump output. Replacing it with a correctly specified part like the Wacker Neuson 5000156622 restores proper carburetor function and keeps the PT3 pump operating at its intended performance level.
Part Details
| Part Number | 5000156622 |
|---|---|
| Old Part Number | 0156622 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Idle Speed Screw |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| PT3 Pump | PT3 | 5000009321, 5000009322, 5000009323 |
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.
