The Honda 12000-ZE2-406 Cylinder Assembly (Alert) is a genuine OEM replacement built for a wide range of Honda generators, the GX240 horizontal shaft engine, and the WT30 water pump. As a Honda OEM component, this assembly is manufactured to the same specifications as the original, ensuring it integrates correctly without modification. This part is designed for the EB3500, EB3800, EB4000, EB5000, EB6500, EG3500, EM3500, EN3500, EN5000, EW140, EZ3500, and EZ5000 generators, the GX240 engine, and the WT30 water pump — verify your serial number against the fitment table before ordering, as Honda supersedes cylinder components at serial breaks.
Key Features
- Genuine OEM Construction — machined to Honda's original bore dimensions and surface finish specifications, maintaining the tolerances that compression and oil control depend on
- Direct Replacement — designed as a drop-in assembly for the listed models, preserving correct bore-to-piston clearance without additional machining
- Broad Fitment — covers GX240 horizontal shaft engines, WT30 water pumps, and a wide range of Honda generators including the EB, EG, EM, EN, EW140, and EZ families
- Serial Number Verification Recommended — Honda updates cylinder assemblies at production breaks; confirm your unit's serial number against the fitment table to ensure this is the correct variant for your machine
- Core Engine Integrity — a damaged or worn cylinder bore leads to compression loss, excessive oil consumption, and eventual engine failure; replacing the cylinder assembly restores the structural and sealing foundation the engine depends on
The cylinder assembly is the main structural casting of the engine. It houses the piston and rings within a precisely finished bore, channeling combustion pressure into usable crankshaft rotation while the bore surface controls oil consumption and maintains compression. When the cylinder bore becomes worn, scored, or damaged — whether from insufficient lubrication, debris ingestion, or extended service — compression drops, oil use increases, and power output falls off noticeably. Replacing the cylinder assembly with a genuine OEM unit restores the bore geometry that every other rotating assembly in the engine is built around, returning the engine to its original operating condition.
Part Details
| Part Number | 12000-ZE2-406 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Cylinder Assembly (Alert) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Generator | EB3500, EB3800, EB4000, EB5000, EB6500, EG3500, EM3500, EN3500, EN5000, EZ3500, EZ5000 | All |
| Horizontal Shaft Engine | GX240 | All |
| Water Pump | WT30 | All |
| Welder Generator | EW140 | All |
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.
