The Honda 16212-ZG8-000 Insulator Gasket is a genuine OEM component designed for GX640 horizontal shaft engines, H4013, H4514, and H4518 lawn tractors, and the H5518 multi-purpose tractor. As a direct OEM replacement, this gasket is produced to Honda's own specifications, ensuring the correct fit between the carburetor insulator and the engine intake. Confirm your serial number against the fitment table before ordering, as Honda supersedes parts at production breaks and the correct gasket depends on your specific unit.
Key Features
- OEM Sealing Integrity — produced by Honda to seal the carburetor insulator joint correctly, preventing air leaks that cause lean running, rough idle, or hard starting
- Direct OEM Replacement — matches the original gasket profile for a drop-in fit with no trimming or modification to the mating surfaces
- Broad Fitment — suits GX640 horizontal shaft engines as well as H4013, H4514, H4518 lawn tractors and the H5518 multi-purpose tractor, including the equipment those engines power
- Serial Number Verification Recommended — Honda updates part supersessions at serial breaks, so check your machine's serial number against the fitment table to confirm this is the right gasket for your unit
The insulator gasket sits between the carburetor insulator spacer and the engine's intake port, forming an airtight seal that keeps the air-fuel mixture consistent as it enters the engine. Without a sound seal at this joint, unmetered air is drawn into the intake, leaning out the mixture and causing symptoms such as erratic idle, loss of power, or difficulty starting. Replacing a damaged or compressed gasket restores the sealed interface the carburetor depends on to meter fuel accurately.
Part Details
| Part Number | 16212-ZG8-000 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Insulator Gasket |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Horizontal Shaft Engine | GX640 | All |
| Lawn Tractor | H4013, H4514, H4518 | All |
| Multi-Purpose Tractor | H5518 | 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.
