The Wacker Neuson Fuel Cap Low Perm Gasket is a genuine OEM component designed for the GP3800, GP4000, GP5600, GP6600, GPS5600A, GPS6600A, and GPS9700 portable generator series. As a direct factory replacement, this part ensures the fuel system maintains the sealing integrity and low-permeation performance required by the original design. Whether you're servicing a standard EPA-compliant unit or a CSA-certified model with a wheel kit or electric start, this gasket is the correct, authorized replacement. Keeping this part in serviceable condition is essential for both fuel system performance and regulatory compliance across the wide range of Wacker Neuson generators it supports.
Key Features
- Low-Permeation Sealing Material — Built to the same low-perm gasket specification as the original, controlling fuel vapor emissions at the cap interface rather than allowing them to escape.
- Genuine OEM Part — Sourced directly from Wacker Neuson, this is the exact component installed at the factory — same material grade, same dimensional profile, same fit.
- Drop-In Cap Replacement — Mounts directly onto the existing fuel cap assembly without modification, restoring a secure, leak-free seal at the tank opening.
- Broad Generator Series Coverage — Compatible with GP3800, GP4000, GP5600, GP6600, GPS5600A, GPS6600A, and GPS9700 series generators across EPA, CSA, and CAN GFI configurations.
- Fuel System Integrity — A degraded or cracked cap gasket allows fuel vapors to escape and can permit contaminants into the tank; replacing it promptly keeps the fuel system operating cleanly and efficiently.
- Emissions Compliance — The low-permeation gasket construction supports EPA and CSA emissions requirements applicable to the generator models this part serves — using the correct OEM gasket maintains that compliance.
The fuel cap gasket forms the primary seal between the fuel tank cap and the tank filler neck on portable generators. Its low-permeation construction limits the passage of fuel vapors through the seal material itself, which is a requirement on modern EPA- and CSA-regulated equipment. When the gasket hardens, cracks, or compresses permanently over time, the seal fails — leading to fuel odor, potential vapor leakage, and the risk of contamination entering the tank. Replacing the Wacker Neuson 5000188220 Fuel Cap Low Perm Gasket at the first sign of deterioration is a straightforward service step that protects both the fuel system and emissions compliance on your generator.
Part Details
| Part Number | 5000188220 |
|---|---|
| Old Part Number | 0188220 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Fuel Cap Low Perm Gasket |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Premium Portable Generator | GP5600A | 5000620094, 5000620095, 5000620381, 5000620382, 5000620984, 5000620979, 5000620980 |
| GPS5600A,CAN GFI | GPS5600A | 5000620096, 5000620383, 5000620981, 5000620982 |
| GP6600A GENERATOR,CAN GFI | GP6600A | 5000620100, 5000620101, 5000620384 |
| GPS6600A GENERATOR,CAN GFI | GPS6600A | 5000620102, 5000620386 |
| Portable Generator | GP3800A | 5000620104, 5000620379, 5000620485 |
| Premium Portable Generator | GP6600 | 5000620385, 5000620989, 5000620990, 5000620985, 5000620986 |
| Premium Portable Generator | GP4000 | 5000620090, 5000620380, 5000620977, 5000620978 |
| GPS9700V Generator, EPA, w/Wheel Kit | GPS9700 | 5200005042, 5000620973 |
| GPS6600A Generator, EPA | GPS6600 | 5000620987, 5000620988 |
| GP3800A Generator, EPA w/Wheel Kit | GP3800 | 5000620976, 5000620974, 5000620975, 5100031174 |
| GP5600A Generator, EPA w/Wheel Kit | GP5600 | 5000620983 |
| GP2500A Generator, EPA | GP2500A | 5200002844 |
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.
