This workshop service manual covers STEYR Motors 4 & 6 Cylinder marine boat engines, specifically models STEYR M 14 TCM, STEYR M 14 TCAM, STEYR M 16 TCM, and STEYR M 16 TCAM. These engines are engineered for reliable performance in marine applications, with the 4-cylinder variants offering 2133 cc displacement and the 6-cylinder variants providing 3200 cc displacement. The manual is designed to support owners and experienced mechanics in understanding and maintaining these robust diesel engines. The purpose of this comprehensive manual is to provide detailed guidance for the maintenance, service, and repair of your STEYR marine engine. It includes essential information on general specifications, safety notes, tightening torques, and wear limits. Furthermore, it covers in-depth procedures for engine components such as the cylinder, crankshaft, pistons, camshaft, fuel system, cooling system, and electrical systems, all presented with detailed illustrations and step-by-step instructions to ensure optimal engine function and longevity.