Description
Overview:
The genuine Honda head gasket (MPN 12251-Z5K-003) is a precision sealing component for Honda GX270 and GX240UT2 engines used in construction and garden machinery. Built from durable, heat‐resistant gasket materials with reinforced sealing around the combustion bore, it sits between the cylinder head and engine block to maintain compression and prevent oil leaks at the joint faces. This helps the engine start reliably, run smoothly, and maintain efficiency over time. Engineered to Honda OEM specifications, it is a direct replacement that fits correctly without modification. Suitable for tradespeople and DIY users carrying out top‐end repairs, rebuilds, or preventative maintenance on equipment powered by GX270 engines, such as generators, plate compactors, pumps, and other site or garden machines. Genuine Honda part for assured compatibility and quality.
Key Features:
- Genuine Honda part for assured fit, materials, and performance
- OEM reference 12251-Z5K-003 for the GX270 platform
- Precise port and bore alignment for an effective seal
- Heat- and pressure‐resistant construction for long service life
- Helps maintain cylinder compression and stable engine output
- Minimises oil seepage at the head-to-block interface
- Direct replacement; no modification or trimming required
- Consistent gasket thickness supports accurate head torqueing
- Suitable for standard unleaded petrol use in air‐cooled engines
- Reliable choice for rebuilds, servicing, and repairs
Typical Applications:
Used during top‐end overhauls, decarbonising, valve work, piston and ring replacement, or whenever the cylinder head is removed on GX270‐powered equipment. Common on generators, plate compactors, pressure washers, water pumps, cement mixers, chippers, and tillers. Ideal for restoring lost compression, addressing head joint leaks, and routine preventative maintenance in both site and garden machinery.
Also known as:
Cylinder head gasket, engine head gasket, head-to-block gasket, combustion sealing gasket, top‐end gasket, OEM head gasket 12251‐Z5K‐003.
Fits Models:
GX240UT2
GX270T2
GX270UT2
Product Specifications
| L&S Part No. | 12251 Z5K 003 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Honda |
| OEM No. | 12251Z5K003 |
| Unit of Sale | 1 |
| Applications | GX240UT2, GX270T2, GX270UT2 |
| Machine Type | Engines |
| Fits Models | GX270UT2 (GCBGT) | GX270T2 (GCBHT) | GX240UT2 (GCBJT) |
