Small engines as referred to here are engines used on lawn mowers, chain saws, power plants, outboards, and cycles. It does not include engines used on automobiles. The course outlined is intended to show how small two-cycle and four-cycle gas engines are constructed, how they operate, what goes wrong, and how to service and repair them. It is also intended as a basis for those who desire to learn about automobile engines. This course is in four sections designed for a 12-week Vocational Program. It is suggested that four consecutive hours per day for 12 weeks be devoted to the program. The units are presented in single logical blocks of instruction, concluding with pertinent study questions, discussions, and demonstrations. Included are laboratory experiences which follow each of the units of study, designed to guide the student in the procedures of assembly and disassembly and direct his work in an orderly fashion. There are 28 instructional units with individual objectives and learning time. (Author/AJ)