The Wacker Neuson Voltage Regulator is a genuine OEM component designed for the GP3800A, GP4000, GP5600A, and GPS5600A series portable generators. Sourced directly from Wacker Neuson, this part meets the exact electrical specifications required to maintain stable output across the GP generator lineup. It covers a wide range of GP-series configurations, including standard, premium, wheel kit, CARB GFI, CSA, and electric start variants. If your generator is producing fluctuating voltage or failing to hold a steady output, this is the part to have on hand.
Key Features
- Correct Output Specification: — Engineered to regulate voltage within the precise tolerance required by Wacker Neuson GP-series generators, ensuring connected equipment receives stable, consistent power.
- Genuine OEM Part: — Supplied by Wacker Neuson as a factory-authorized component — same part installed at the point of manufacture, with no substitution in materials or design.
- Broad GP-Series Compatibility: — Fits GP3800A, GP4000, GP5600A, and GPS5600A generators across multiple configuration variants, including standard portable, premium, wheel kit, electric start, CARB GFI, EPA, and CSA models.
- Direct-Swap Installation: — Replaces the original regulator using the existing mounting and wiring connections on supported GP-series models — no adapter or rewiring needed.
- Protects Connected Equipment: — A failed voltage regulator can cause over- or under-voltage conditions that damage power tools, site lighting, and other equipment running off the generator. Restoring the regulator brings output back within safe operating range.
The voltage regulator controls the electrical output of the generator's alternator, maintaining a steady voltage level regardless of changes in load or engine speed. It acts as the control point between the spinning alternator and the power outlets — without it functioning correctly, output voltage can spike, drop, or become unstable. A worn or failed regulator typically shows up as flickering connected equipment, voltage readings outside the rated spec, or a generator that runs but delivers no usable power.
Part Details
| Part Number | 5000162491 |
|---|---|
| Old Part Number | 0162491 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Voltage Regulator |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Portable Generator | GP3800A | 5000620104, 5000620379, 5000620485, 5000620342, 5000620484, 5000620041, 5000620103, 5000620010 |
| Premium Portable Generator w/ wheel kit | GP5600A | 5000620381, 5000620382, 5000620326, 5000620327, 5000620979, 5000620091, 5000620092, 5000620011, 5000620012 |
| Premium Portable Generator w/ electric start | GPS5600A | 5000620383, 5000620328, 5000620981, 5000620093, 5000620013 |
| Premium Portable Generator | GP4000 | 5000620090, 5000620380, 5000620977, 5000620978, 5000620089 |
| GP3800A Generator, EPA w/Wheel Kit | GP3800 | 5000620976, 5000620974, 5000620975, 5100031174 |
| GP5600A Generator, EPA w/Wheel Kit | GP5600 | 5000620983 |
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.
