Description
Overview:
This Exhaust Valve for Villiers MK40 Engines (M855) is a genuine Villiers OEM component designed to restore and maintain correct exhaust sealing and flow in MK40 petrol engines used across light construction and garden machinery. Manufactured from heat‐resistant steel with a hardened stem and a precision‐ground valve face, it resists high temperatures and wear in the exhaust port. The valve helps maintain stable compression, smooth running, and overall engine longevity. Supplied as unused vintage stock, it may show cosmetic tarnishing from storage, which does not affect performance. This direct replacement is intended for straightforward fitting during routine servicing or full top‐end rebuilds, supporting reliable operation without modification when paired with a serviceable seat and guides. Genuine Part for assured compatibility and fit.
Key Features:
- Genuine Villiers OEM exhaust valve for MK40 engines
- Heat‐resistant steel construction for durability at high temperatures
- Precision‐ground face and stem to support reliable sealing
- Restores efficient exhaust flow and stable engine performance
- Direct‐fit replacement; no modifications typically required when seats are in good condition
- Unused vintage stock; may show light storage tarnish only
- Compatible with standard MK40 valve springs, collets/keepers, and retainers
- Aids in resolving loss of power, misfiring, and poor hot starting linked to burnt or leaking valves
- Suitable for routine maintenance and full restorations to minimise downtime
Typical Applications:
Used during engine services and rebuilds on Villiers MK40-powered equipment such as compact construction plant (e.g. mixers, generators, pumps) and garden machinery (e.g. mowers, tillers, rotavators). Fit when diagnosing low compression, exhaust leakage, burnt valve faces, or irregular idle and to restore reliable hot gas evacuation from the cylinder.
Also known as:
Exhaust poppet valve, outlet valve, cylinder head valve, engine valve (exhaust side), exhaust port valve, valve head, valve for MK40, replacement exhaust component for Villiers engines.
Fits Models:
MK40
Alternate Part Numbers:
M855
Product Specifications
| L&S Part No. | M855 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Villiers |
| OEM No. | M855 |
| Unit of Sale | 1 |
| Applications | MK40 |
| Machine Type | Engines |
| Fits Brands | Villiers |
| Fits Models | MK40 |
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