Several intermediate performance objectives and corresponding criterion measures are listed for each of 12 terminal objectives for a basic diesel mechanics course. The course is designed as a two-semester (2 hour daily) course for 10th graders interested in being diesel service and repair mechanics; it would serve as the first year of a 3-year secondary school program. Based on shop manipulative practices in addition to related classroom instruction, the focus of instruction is on use of tools and safety, engine theory, terminology, main stationary parts, major moving parts, valve gear and scavenging systems, fuel injection systems, burning the fuel, lubrication system, cooling system, and governing. The titles of the 12 terminal objectives are Orientation, Theory of Internal Combustion Engines, Operating Principles, Design Variation, Main Stationary Parts, Major Moving Parts, Value Gear, Intake and Exhaust, Lubrication System, Cooling System, Fuel Injection System, Burning the Fuel, and Governing. (This manual and 54 others were developed for various secondary level vocational courses using the System Approach for Education (SAFE) guidelines.) (HD)