Description
Overview:
This Genuine Honda cylinder head gasket is a precision sealing component for small petrol engines, including Honda GX120 and GX120K1. It sits between the cylinder head and engine block to maintain compression and keep combustion gases and oil contained. Built from heat‐resistant composite materials with a metal-reinforced fire ring around the bore, it delivers a tight, durable seal under high temperatures and vibration. Correct gasket integrity helps engines start easily, run smoothly, and retain power. Suitable for a wide range of construction, hire, and garden machinery powered by the GX120 platform, this OEM part (12251-ZH7-800) restores factory fit and performance during routine servicing or a top‐end rebuild.
Key Features:
- Genuine Honda part for assured compatibility and performance
- Exact fit for Honda GX120 series for reliable sealing and compression
- Durable, heat‐resistant construction with metal fire ring at the cylinder bore
- Helps prevent loss of compression and oil seepage between block and head
- Supports smooth running, power retention, and fuel efficiency
- Stable under thermal cycling and vibration common in site use
- Suitable for routine head refits and full top‐end overhauls
- Clean edges and correct port alignment for straightforward fitting
- OEM cross-reference: 12251-ZH7-800
Typical Applications:
Used during cylinder head removal/refit, decoke, valve service, or when rectifying head leakage on GX120 engines. Common on generators, water pumps, plate compactors, pressure washers, tillers, and other equipment where dependable sealing is needed for daily site, workshop, or garden use.
Also known as:
Cylinder head seal, head gasket, top‐end gasket, head joint, combustion chamber gasket, engine head seal, block-to-head gasket.
Fits Models:
GX120, GX120K1, GX120T1, GX120U1, GX120UT1, WB20XT
Alternate Part Numbers:
12251-ZH7-800, 12251ZH7800
Product Specifications
| L&S Part No. | 12251 ZH7 800 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Honda |
| OEM No. | 12251ZH7801 |
| Unit of Sale | 1 |
| Applications | GX120, GX120K1, GX120T1, GX120U1, GX120UT1, WB20XT |
| Machine Type | Engines |
| Fits Brands | Honda |
| Fits Models | GX120K1 (GC01) | GX120T1 (GCAAT) | GX120UT1 (GCAGT) | GX120U1 (GCAHK) | WB20XT |
