This rare and valuable Villiers general specification sheet provides comprehensive technical details for Villiers Mk 10 to Mk 40 engines. The sheet offers a wealth of information for mechanics and enthusiasts, showcasing the intricate workings of these iconic engines. It's a must-have for anyone working on or interested in Villiers engines, providing a detailed overview of their specifications and design. This technical manual is a valuable resource for anyone seeking a deeper understanding of Villiers Mk 10 to Mk 40 engines, making it an ideal addition to any workshop or garage.

The Villiers Mk 10 to Mk 40 engine series was a range of small, single-cylinder, two-stroke petrol engines produced by the Villiers Engineering Company in the United Kingdom. These engines, also commonly referred to as Villiers "general specification" engines, were known for their robust construction, reliable performance, and versatility. The Mk 10, launched in 1930, marked the beginning of this successful series, and subsequent models, including the Mk 12, Mk 15, Mk 18, Mk 20, Mk 25, Mk 30, Mk 35, and Mk 40, saw incremental improvements and variations in power output. Each model was designed to meet specific power requirements, with displacements ranging from 98cc to 198cc, delivering power outputs from 1.5 to 4.5 horsepower. They featured a simple, sturdy design, with a cast iron cylinder, a die-cast crankcase, and a light alloy piston. The engine's cooling was achieved through an efficient finned cylinder head and the use of a cooling air intake system.

The Villiers general specification engines found widespread use in a multitude of applications, including motorcycles, mopeds, light aircraft, go-karts, lawnmowers, pumps, generators, and stationary machinery. The engines, known for their ease of starting and smooth running, were particularly popular in the motorcycle and moped industry, powering a vast array of British and European brands. The engines' durability and versatility made them suitable for a wide range of duties, from powering small-scale agricultural equipment to providing auxiliary power for lightweight aircraft. The Villiers Mk 10 to Mk 40 engine series, with its renowned reliability and adaptability, left an enduring legacy on the automotive and industrial landscape, contributing significantly to the development and advancement of small-engine technology.