The Honda 16211-Z5V-900 Carburetor Insulator is a genuine OEM component designed for GXV390 vertical shaft engines. As a direct Honda replacement, this part matches the original in every dimension and material grade, ensuring a proper seal and correct thermal separation between the carburetor and the cylinder head. If your GXV390 engine is showing signs of fuel system heat issues or the existing insulator is cracked, hardened, or leaking, this is the correct replacement part to restore proper operation.
Key Features
- Genuine OEM Sourcing — supplied directly from Honda, this Carburetor Insulator meets the same specifications as the part that left the factory, so fuel metering and carburetor seating are uncompromised.
- Thermal Separation — placed between the carburetor and the cylinder head, this insulator shields the carburetor from engine heat, helping prevent fuel vaporization in the inlet and maintaining consistent fuel delivery.
- Exact Fit for GXV390 Engines — engineered specifically for the GXV390 vertical shaft engine; verify your engine serial number against the fitment table to confirm compatibility with your serial range.
- Sealing Integrity — a cracked or deteriorated insulator allows unmetered air into the intake path, causing lean running, rough idle, and hard starting; replacing it restores the airtight connection the carburetor depends on.
The carburetor insulator is a heat-isolating spacer that mounts between the carburetor body and the engine's cylinder head intake port. Its job is to block the transfer of combustion heat into the carburetor, keeping the fuel inside cool enough to remain liquid until it enters the combustion chamber. When the insulator cracks, warps, or hardens with age, it creates an air leak at the intake joint — the engine runs lean, idles erratically, and may be difficult to start or keep running. Replacing a failed insulator with part number 16211-Z5V-900 restores the correct seal and thermal barrier, allowing the carburetor to deliver the precise air-fuel mixture the GXV390 engine needs.
Part Details
| Part Number | 16211-Z5V-900 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Carburetor Insulator |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Vertical Shaft Engine | GXV390 | 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.
