The Wacker Neuson Cummins Engine is a genuine OEM engine assembly designed for the G100 Generator series, covering Custom T4i, Standard T4i, Cold Weather T4i, and Hertz T4i configurations. As a direct OEM replacement, this engine is sourced and supplied to the same specifications as the unit that left the factory, ensuring a correct, confidence-inspiring install. Fitment is confirmed across the full G100 T4i lineup, making this the definitive replacement choice for operators and service technicians working on any G100 variant.
Key Features
- Genuine Cummins Power Source — OEM-specified Cummins engine assembly engineered to the exact output, torque, and emissions profile required by the G100 platform.
- Tier 4i Emissions Compliance — Meets EPA/CARB Tier 4 Interim standards as originally equipped, keeping your generator legally operable on regulated jobsites without retrofitting.
- Direct-Fit Replacement — Mounts and connects to the G100 generator frame and electrical system using the existing bolt pattern and interface points, simplifying the swap.
- Full G100 T4i Series Coverage — Compatible with Custom T4i, Standard T4i, Cold Weather T4i, and Hertz T4i G100 Generator configurations from a single part number.
- Sustained Power Output Integrity — A correctly functioning engine maintains stable voltage and frequency delivery from the G100; a worn or failed engine causes output instability, undervoltage faults, and unplanned shutdown.
- Fuel System and Safety Compliance — As an OEM-supplied power unit, the engine includes the correct fuel, cooling, and emissions hardware to keep the generator operating within its designed safety parameters.
The engine is the primary power source of the G100 portable generator, converting diesel fuel into the mechanical rotation that drives the alternator to produce electrical output. In a generator application, engine health directly determines output quality — an underperforming or failing engine produces fluctuating voltage and frequency, which can damage connected equipment and trigger protective shutdowns. Replacing a worn engine with a genuine OEM Cummins unit restores full rated output and ensures the G100 continues to deliver dependable site power across its full load range.
Part Details
| Part Number | 5200003994 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Cummins Engine |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| G100 Generator, Custom T4i | G100 | 5200003859, 5200003857, 5200003858, 5200008716 |
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.
Wacker Neuson