About this Workshop Manual This Workshop Manual contains technical specifications, descriptions and instructions for the repair of the following engines in standard format: MD2010, MD2020, MD2030, MD2040. This Workshop Manual can show operations carried out on any of the engines li sted above. As a result the illustrations and pictures in the manual that show certain parts on the engines, do not in some cases apply to all the engines listed. However the repair and service operations described are in all essential details the same. Where they are not the same this is stated in the manual and where the difference is considerable the operations are described separately. The Engine Designations and Engine Number can be found on the product plate. Please always include both the engine designation and the engine number in all correspondance .