The Honda 16211-Z4M-900 Carburetor Insulator is a genuine OEM component designed for the GX160 horizontal shaft engine and Honda water pumps including the WB20, WB30, WH15, WH20, WMP20, WT20, and WT30. As a direct OEM replacement, this part is manufactured to the same specification as the original, ensuring a correct fit without modification. Honda supersedes parts at serial breaks, so confirm your unit's serial number against the fitment table before ordering. This Carburetor Insulator is the right choice when restoring proper heat management between the carburetor and cylinder head on your engine or pump power unit.
Key Features
- Genuine Honda OEM Part — sourced directly from Honda, this Carburetor Insulator meets the same specification as the part that left the factory, ensuring the heat-blocking function performs as intended between the carburetor and cylinder head.
- Thermal Isolation — correctly separates the carburetor from engine heat, protecting fuel metering and preventing heat soak that can cause hard starting, rough running, or vapor lock.
- Broad Fitment — fits the GX160 horizontal shaft engine and a wide range of Honda water pumps including the WB20, WB30, WH15, WH20, WMP20, WT20, and WT30; verify your serial number against the fitment table to confirm the correct application.
- Direct Replacement — this part installs in place of the original with no alteration required, making it the straightforward choice for scheduled maintenance or failure repair.
The Carburetor Insulator is a heat-isolating spacer mounted between the carburetor and the cylinder head. Its role is to limit the transfer of combustion heat into the carburetor body, keeping the incoming fuel-air mixture at the temperature the carburetor is designed to handle. When this insulator cracks, warps, or deteriorates, excess heat migrates into the carburetor, disrupting fuel metering and causing symptoms such as difficult starting, erratic idling, or stalling under load — particularly after the engine has been running for a period and heat has built up. Replacing a damaged insulator restores the thermal barrier the carburetor depends on to deliver consistent fuel delivery across normal operating conditions.
Part Details
| Part Number | 16211-Z4M-900 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Carburetor Insulator |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Horizontal Shaft Engine | GX160 | All |
| Water Pump | WB20, WB30, WH15, WH20, WMP20, WT20, WT30 | 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.
