The Honda 12391-ZE8-000 Head Cover Gasket is a genuine OEM replacement designed for GXV270, GXV340, and GXV390 vertical shaft engines, as well as Honda H-series riding mowers and lawn tractors and HRC-series commercial mowers. As a direct OEM replacement, this gasket is manufactured to Honda's exact tolerances, ensuring a proper seal at the head cover joint. Verify your machine's serial number against the fitment table before ordering, as Honda supersedes parts at serial breaks and the correct revision matters for a leak-free result.
Key Features
- OEM-Grade Head Cover Seal — manufactured to Honda's exact specification for consistent compression and oil retention at the head cover interface, not a generic profile that approximates the fit
- Direct OEM Replacement — sourced directly from Honda, part number 12391-ZE8-000 drops in without modification for a clean, reusable-fastener-friendly installation
- Broad Fitment Across Honda Vertical Shaft Equipment — covers GXV270, GXV340, and GXV390 engines powering H1011, H2013, H2113, H3011, H3013, H4013, H4514, H4518 riding mowers and lawn tractors, and HRC7013 and HRC7113 commercial mowers
- Serial Number Awareness — Honda revises part fitment at production serial breaks; confirm your unit's serial number against the compatibility table to ensure this is the right gasket revision for your machine
- Stops Oil Seepage Before It Becomes a Bigger Problem — a degraded or improperly seated head cover gasket allows oil to weep past the cover joint, leading to contamination of surrounding components and potential oil loss over time
The head cover gasket forms the seal between the valve cover and the cylinder head on Honda's GXV-series vertical shaft engines. It prevents engine oil from escaping at that joint while the engine runs under heat and vibration. When this gasket hardens, cracks, or is compressed beyond its serviceable limit, oil seeps out around the cover — a condition that worsens with run time and can lead to fouled components or low oil levels if left unaddressed. Replacing it with a genuine Honda gasket restores a clean, durable seal and returns the engine to proper operating condition.
Part Details
| Part Number | 12391-ZE8-000 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Head Cover Gasket |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Commercial Mower | HRC7013, HRC7113 | All |
| Lawn Tractor | H2013, H2113, H4013, H4514, H4518 | All |
| Riding Mower | H1011, H3011, H3013 | All |
| Vertical Shaft Engine | GXV270, GXV340, 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.
