The Breather Valve Assembly M2900E is a Genuine Villiers part for classic small engines, including the MK15 and C12 series. It is a compact, metal-bodied unit that controls crankcase ventilation to stabilise internal pressure. By allowing controlled airflow, it helps reduce oil mist, limits leaks, and supports consistent running and lubrication. This assembly is intended for vintage Villiers-powered machinery where original specification and reliability matter. Supplied as unused old stock, it may show cosmetic ageing such as tarnishing, which does not affect function. It is a practical choice for routine servicing or restoration work, helping to keep older engines working cleanly and efficiently while preserving authenticity. Marked with OEM number M2900E for clear identification during maintenance and parts matching.

Key Features:
– Genuine Villiers part for assured compatibility and fitment (OEM M2900E)
– Regulates crankcase pressure to support smooth running and reduce oil leaks
– Helps minimise oil mist and contamination inside the engine
– Metal construction for durability on vintage plant and garden machinery
– Suitable for restoration and ongoing maintenance of older engines
– Designed to match original specifications for MK15 and C12 series engines
– Straightforward replacement for worn or damaged breather assemblies
– Unused old stock; may have light tarnish but remains fully serviceable
– Supports seal and gasket longevity by preventing excess pressure build-up
– Clear OEM marking for easy identification in parts catalogues

Typical Applications:
Used on vintage Villiers-powered equipment such as stationary engines and light machinery found in workshops, on small construction sites, or in gardens. Ideal for engine rebuilds, periodic servicing, and troubleshooting oil leaks or pressure-related running issues. Suitable for enthusiasts, DIY users, and tradespeople maintaining reliable operation and original performance characteristics on classic engines.

Also known as:
Crankcase breather valve, engine breather assembly, crankcase vent, pressure breather, breather unit, Villiers breather, breather housing assembly. These terms are commonly used when identifying the component responsible for venting crankcase gases and maintaining correct internal pressure on classic Villiers engines.

Fits Models:
C12, MK15, MK15/2, MK152

Product Specifications