The Honda 12251-ZG9-000 Cylinder Head Gasket is a genuine OEM replacement designed for GXV140 vertical shaft engines and a broad range of Honda walk-behind lawn mowers, including the HR195, HR215, HRA215, HRB215, HRC215, HRC216, HRM195, and HRM215. As a genuine Honda part, it is manufactured to the exact tolerances required to maintain a proper combustion seal between the cylinder head and engine block. Confirm your machine's serial number against the fitment table before ordering, as Honda updates part supersessions at serial break points.
Key Features
- Combustion Seal Integrity — engineered to Honda's exact head-to-block tolerances, this gasket maintains compression and prevents combustion gases from escaping past the cylinder head joint
- Genuine OEM Part — sourced directly from Honda, part number 12251-ZG9-000 carries no guesswork about material grade or clamping retention — it is the same component that ships in new Honda equipment
- Broad Mower and Engine Coverage — fits the GXV140 vertical shaft engine and Honda HR, HRA, HRB, HRC, and HRM series walk-behind lawn mowers, including the HR195, HR215, HRA215, HRB215, HRC215, HRC216, HRM195, and HRM215
- Serial Number Verification Recommended — Honda supersedes gaskets at production serial breaks, so cross-check your unit's serial number against the fitment table to confirm this is the correct version for your engine
- Restores Lost Compression — a blown or leaking head gasket causes hard starting, rough running, and power loss; replacing it with this genuine part brings combustion pressure back to spec and returns the engine to full working condition
The cylinder head gasket sits between the cylinder head and the engine block, forming a pressure-tight seal that keeps combustion gases contained within the combustion chamber where they belong. Without an intact seal, compression leaks out around the joint, robbing the engine of the pressure it needs to ignite the fuel-air mixture and generate power — symptoms include hard starting, a noticeable drop in cutting performance, and rough idling. When a head gasket fails or is disturbed during a head removal, replacing it with a genuine Honda part ensures the sealing surface is restored correctly and the engine returns to reliable operation.
Part Details
| Part Number | 12251-ZG9-000 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Cylinder Head Gasket |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Lawn Mower | HR195, HR215, HRA215, HRB215, HRC215, HRC216, HRM195, HRM215 | All |
| Vertical Shaft Engine | GXV140 | 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.
