The Honda 16211-ZBH-700 Carburetor Insulator is a genuine OEM component designed for GX390 horizontal shaft engines. As a direct OEM replacement, this part is manufactured to Honda's exact specifications, ensuring the correct fit and function on the GX390. Buyers should confirm their engine serial number against the fitment table, as Honda periodically supersedes parts at serial number breaks.
Key Features
- Genuine OEM Heat Isolation — sourced directly from Honda, this insulator delivers the correct thermal barrier between the carburetor and the cylinder head, preventing fuel vapor lock caused by excess heat transfer
- Direct OEM Replacement — built to the same specification as the original, this part installs without modification on GX390 horizontal shaft engines
- Serial Number Verification Recommended — Honda supersedes parts at serial breaks; check your engine's serial number against the fitment table before ordering to confirm this is the right insulator for your unit
- Protects Fuel System Performance — a degraded or cracked insulator allows heat to migrate into the carburetor, disrupting fuel metering and causing hard starting, rough running, or stalling under load
The carburetor insulator is a heat-isolating spacer mounted between the carburetor and the intake port on the cylinder head. Its job is to block conducted heat from the engine from reaching the carburetor body, keeping fuel in the float bowl and fuel passages at a stable temperature. When the insulator cracks, warps, or deteriorates, engine heat migrates into the carburetor, causing fuel to vaporize prematurely — a condition known as vapor lock — which typically presents as hard hot-starting, erratic idling, or the engine dying shortly after warm-up. Replacing a failed insulator restores the thermal separation the fuel system depends on for consistent, stable operation.
Part Details
| Part Number | 16211-ZBH-700 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Carburetor Insulator |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Horizontal Shaft Engine | GX390 | 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.
