The Wacker Neuson Spark Plug BPR4ES (Honda) is a genuine OEM ignition component designed for GP3800A portable generators, RD11A hydrostatic double drum vibratory rollers, and WB16AE series power buggies. As a factory-sourced part, matches the original Honda engine specification exactly, ensuring the correct heat range, thread pitch, and electrode gap right out of the box. This spark plug is a direct fit across the full GP3800A generator family — including wheel kit and premium variants — as well as the RD11A and RD11AEC rollers and the extensive WB16A power buggy lineup.
Key Features
- Correct Heat Range for Honda Engines — Matched to the BPR4ES specification required by the Honda engines fitted to GP3800A, RD11A, and WB16A series machines, preventing pre-ignition and plug fouling.
- Genuine OEM Part — Sourced directly from Wacker Neuson, this plug carries the same part number (5000118792) used in factory assembly, so there is no guesswork about compatibility.
- Drop-In Installation — Pre-gapped to OEM specification with the correct thread size and reach for the Honda engine block; installs with standard spark plug tools and no additional setup.
- Broad Cross-Model Coverage — Fits the complete GP3800A generator family, RD11A and RD11AEC rollers, and the full range of WB16AE, WB16ADE, WB16AEF, WB16AES, and multi-suffix power buggy models.
- Consistent Cold-Start Performance — A fresh, correctly specified spark plug restores reliable ignition in all weather conditions, keeping generators, rollers, and power buggies starting cleanly on the first pull.
- Ignition System Integrity — Using the correct plug grade protects the ignition coil and carburetor from the misfires and rich-running conditions that a worn or incorrect plug can cause.
A spark plug is the ignition point of the combustion cycle — it delivers the precisely timed electrical spark that ignites the air-fuel mixture inside the engine cylinder. In Honda-powered equipment like the GP3800A generator and WB16A power buggy, the BPR4ES designation specifies the plug's heat range, resistor type, and electrode dimensions, all of which must match the engine's design to achieve clean combustion. When a spark plug wears, the electrode gap widens, the spark weakens, and the engine becomes hard to start, runs roughly, or burns excess fuel — replacing it with the correct OEM plug restores full combustion efficiency and protects downstream engine components.
Part Details
| Part Number | 5000118792 |
|---|---|
| Old Part Number | 0118792 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Spark Plug BPR4ES (Honda) |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Portable Generator | GP3800A | 5000620104, 5000620379, 5000620485, 5000620342, 5000620484 |
| Hydrostatic Double Drum Vibrat ory Roller | RD11AEC | 5000007695 |
| Hydrostatic Double Drum Vibrat ory Roller | RD11A | 5000007693 |
| Power Buggy | WB16AE | 5000009284, 5000009042, 5000009266 |
| Power Buggy | WB16AEF | 5000009290, 5000009046, 5000009272 |
| Power Buggy | WB16AES | 5000009291, 5000009047, 5000009273 |
| Power Buggy | WB16AEFS | 5000009296, 5000009052, 5000009278 |
| Power Buggy | WB16ADE | 5000009287, 5000009044 |
| Power Buggy | WB16ADEF | 5000009293, 5000009049 |
| Power Buggy | WB16ADES | 5000009050 |
| Power Buggy | WB16ADEFS | 5000009053 |
| GP3800A Generator, EPA | GP3800 | 5000620974, 5000620975, 5000620976 |
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.
