The Honda 12210-Z5T-416 Cylinder Head is a genuine OEM Cylinder Head designed for GX340 and GX390 horizontal shaft engines, a wide range of Honda generators including the EB3800, EB4000, EB5000, EB6500, EG5000, EG6500, EM3800, EM4000, EM5000, EM6500, EM7000, and EU6500, Honda HS928, HS1332, HS1336, HSM1336, HSS928, and HSS1332 two-stage snow blowers, and the WT40 water pump. As a genuine Honda part, it is manufactured to the same specifications as the original component and carries Honda's OEM backing for assured compatibility. Confirm the serial number on your machine against the fitment table before ordering, as Honda updates parts at specific production breaks.
Key Features
- Genuine OEM Construction — sourced directly from Honda, this Cylinder Head meets the original design specifications for combustion chamber geometry, port sizing, and valve seat dimensions — the critical tolerances that an aftermarket casting may not replicate.
- Broad Cross-Equipment Compatibility — a single part number covering GX340 and GX390 engines, multiple EB, EG, EM, EU, and EB generator models, HS and HSS two-stage snow blowers, and the WT40 water pump; use your model and serial number to confirm this is the correct head for your unit.
- Direct Drop-In Replacement — engineered to the original bolt pattern, gasket surface, and port alignment so this head installs without modification using the fasteners and gasket specified in your Honda service manual.
- Restores Compression and Combustion Efficiency — a cracked, warped, or eroded cylinder head causes compression loss, hard starting, and overheating; replacing it with a correct OEM head restores the sealed combustion chamber the engine needs to run at full power.
- Serial Number Verification Recommended — Honda supersedes cylinder head part numbers at production serial breaks; always cross-reference your machine's serial number with the compatibility table to confirm part number 12210-Z5T-416 is current for your specific unit.
The cylinder head is the uppermost structural casting of the engine, forming the sealed combustion chamber above the piston where the air-fuel mixture is compressed and ignited. It houses the valves, valve seats, and valve guides that control the flow of intake charge and exhaust gases, and its gasket surface mates with the cylinder block to maintain compression. When a cylinder head warps from overheating, cracks from impact or freeze damage, or develops eroded valve seats, the engine loses compression, burns oil, runs rough, or refuses to start — and no amount of tuning will compensate for a compromised combustion chamber.
Part Details
| Part Number | 12210-Z5T-416 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Cylinder Head |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Generator | EB3800, EB4000, EB5000, EB6500, EG5000, EG6500, EM3800, EM4000, EM5000, EM6500 | All |
| Horizontal Shaft Engine | GX340, GX390 | All |
| Inverter Generator | EB7000, EM7000, EU6500 | All |
| Two-Stage Snow Blower | HS928, HS1332, HS1336, HSM1336, HSS928, HSS1332 | All |
| Water Pump | WT40 | 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.
