Description
Overview:
This Exhaust Gasket is a Genuine Part for Honda GX series engines and replaces OEM 18333 ZE3 800. It sits between the exhaust manifold (silencer/muffler) and the cylinder head to create a gas-tight seal, helping to prevent exhaust leaks and protecting mating surfaces from hot gases. Made from a heat-resistant composite with metal reinforcement around the port, it is designed to cope with high temperatures, vibration, and repeated thermal cycles. Intended for small petrol engines commonly used in construction and garden machinery, it provides a precise fit for Honda GX270 and GX390 engines, and is equally suitable across the wider GX range listed below. Use it when refitting the silencer, after removing the exhaust, or whenever the original gasket shows signs of damage or blow-by.
Key Features:
- Genuine Part for assured fit and material quality
- Direct replacement for OEM 18333 ZE3 800
- Heat-resistant composite with metal reinforcement for durability
- Accurate port and bolt-hole alignment for reliable sealing
- Helps prevent exhaust blow-by, soot deposits, and loss of performance
- Protects cylinder head and manifold faces from erosion and pitting
- Stable under vibration, suitable for tough site and outdoor use
- Straightforward installation with standard hand tools, minimising downtime
Typical Applications:
Used when servicing or repairing the exhaust on Honda GX engines fitted to generators, plate compactors, water pumps, pressure washers, cement mixers, tillers, chippers, and similar equipment. Ideal after removing the silencer for maintenance, or when an exhaust leak, excess noise, or soot marks around the flange indicate a failed gasket.
Also known as:
Exhaust manifold gasket, silencer gasket, muffler gasket, exhaust port gasket, engine exhaust sealing gasket for Honda GX-series engines.
Fits Models:
GX240, GX270, GX340, GX390
Product Specifications
| L&S Part No. | 355 1386 |
|---|---|
| Part Type | Non Genuine Part |
| Unit of Sale | 1 |
| Machine Type | Engines |
| Key Features | - Genuine part for Honda GX series engines - Replaces OEM 18333 ZE3 800 - Heat-resistant composite with metal reinforcement - Fits GX240, GX270, GX340, GX390 models - Prevents exhaust leaks and protects surfaces |


