WIS424 SMALL GASOLINE ENGINES 02/26/1990 09:11 AM D1 321 Lines Agriculture Mechanization/Engineering and Technical Support Services Small Gasoline Engines (15-45 days) This unit deals with the theory, operation, and maintenance of small gas engines. Topics include career opportunities, tool identification and use, principles of operation for two- and four-stroke engines, preventive maintenance, repair, and the use of shop manuals and part books. Objectives To acquaint students with employment information and career opportunities in the small gasoline engine industry To increase student awareness of the proper care and use of shop tools To emphasize to students the need for adherence to safety guidelines when working with tools and machinery To increase student understanding of the basic mechanical principles of internal combustion engines To develop student understanding of the main systems and components of gasoline engines and their functions To provide students with an opportunity to practice skills needed in working with small gasoline engines To increase student ability to use reference manuals and other written materials in performing maintenance and repair on small gasoline engines Competencies At the conclusion of this unit, students will be able to explain current employment information such as job descriptions, job availability, personal and educational requirements, working conditions, opportunity for advancement, and other factors relative to potential employment in the small gas engine industry and relate it to their personal needs and aspirations; name and correctly use tools and instruments for working on small gasoline engines; identify types of fasteners and threads; torque various types of fasteners to specifications; explain and demonstrate procedures for cleaning and conditioning shop equipment and tools; follow and appreciate the need for safety guidelines; explain small gas engine components, terminology, and principles of operation; understand the differences between two-stroke and four-stroke engines; perform preventive maintenance, overhaul, troubleshooting, repair, and tune-up operations on small gasoline engines; demonstrate proper engine starting and operation procedures; outline recommended storage procedures for small gasoline engines; locate and use reference manuals, catalogs, and records for small gasoline engines; perform maintenance and repair operations on various power transmission systems; and remove, inspect, and sharpen mower blades. Subject Matter (Basic skills integration areas are shown in brackets following title.) Careers - Current and future employment needs - Job descriptions - Training requirements - Working conditions - Opportunities for advancement - Other factors Shop tool identification and proper application - Hand tools - Power tools - Instrumentation Fasteners - Fasteners - Thread identification Shop equipment operation - Cleaning equipment - Reconditioning equipment Shop safety - Eye safety and appropriate dress - Housekeeping - Laboratory rules and attitude Principles of operation and identification - Four-stroke cycle - Two-stroke cycle Engine component identification - Stationary - Moving parts Small gasoline engine preventative maintenance programs - Cooling systems - Engine cleaning procedures - Air cleaners and breathers - Lubrication systems - Fuel selection Use Storage - Electrical system - Carburetor service - Plug service - Carburetor service - Compression checks - Battery service Engine starting and operation - Starting procedures - Operating procedures - Safety Engine storage - Importance of proper storage - Engine protection procedures Measuring instruments [Mathematics] - Micrometers - Calipers - Gauges - Speed measuring tools Service manuals, parts books, and service records - Engine specifications - Parts catalogs - Service and business records Diagnostic procedures [Science] - Ignition - Carburetion - Compression Maintenance and repair - Shop procedures and work quality - Starters - Ignition systems - Fuel systems - Valves - Cylinders and piston rod assemblies - Lubrication systems - Cam and crank assemblies Power transmission systems - V-belts and sheaves - Chains and sprockets - Gears - Bearings - Clutches Mower blade sharpening - Removal and inspection - Sharpening and balancing Motivational Activities Take field trips to a small engine manufacturer and a small-engine repair shop. Use laboratory time to give students an opportunity to repair small engines. Hold troubleshooting contests. View films, videotapes, and slides on topics related to this unit. Learning Activities Participate in a Supervised Agricultural Experience program. Identify and describe the function of tools and equipment to use with small gasoline engines. Describe safety procedures to follow when working with small gasoline engines. Identify and describe engine parts and principles. Tune up or overhaul an engine in the laboratory. Take part in troubleshooting contests. Demonstrate how to correctly sharpen lawn mower blades. Participate in laboratory lessons on service specification, measuring, and how to order parts. Instructional Materials Textbooks and References Air Cooled Engine Mechanics Training Manual. Milwaukee, WI: Engine Service Association, 1974. Chain Saw Service Manual. 8th ed. Overland Park, KS: Intertec Publishing, 1988. Compact Tractor Service Manual. 2nd ed. Overland Park, KS: Intertec Publishing, 1986. Light Utility Tractor Service Manual, Vol. I. Overland Park, KS: Intertec Publishing, 1975. Outboard Motor Service Manual, Vol. 1. 10th ed. Overland Park, KS: Intertec Publishing, 1987. Outboard Motor Service Manual, Vol. 2. Overland Park, KS: Intertec Publishing, 1987. Small Engines Explained by Leo Rizzo. Garden City, NY: Bergwall Productions, 1982. Small Engines Training Manual by Howard W. Sams. Danville, IL: Interstate, 1973. Small Engines, Operation, Maintenance and Repair. Athens, GA: American Association of Vocational Instructional Materials, 1987. Small Engines Service Manual. 15th ed. Overland Park, KS: Intertec Publishing, 1986. Small Gasoline Engines. St. Paul, MN: Hobar, 1984. Small Tractor Service Manual. 7th ed. Overland Park, KS: Intertec Publishing, 1988. Snowmobile Service Manual. 10th ed. Overland Park, KS: Intertec Publishing, 1986. Bulletins and Pamphlets The following are available from Briggs and Stratton Corporation. General Theories of Operation Repair Instructions IV The following are available from Vocational Agriculture Services. Small Engines - Principles of Operation, Trouble Shooting and Tune-up. U3014. Small Engines - Repair and Overhaul. U3019. The Two-Cycle Engine. U3020. Periodicals Successful Farming Computer Software The following is available from the American Association for Vocational Instruction Materials. Small Gas Engines Parts Identification. Apple. The following is available from Hobar Publications. Small Gas Engines and Related Review. Apple, IBM, TRS, Macintosh. Laboratory Resources Service manuals for small gasoline engines Films, Videotapes, and Slides The following are available from Bergwall Productions, Inc. Outboard Marine Engines Explained. (Slidefilm with cassette, four parts). Small Engines Explained. (Slidefilm with cassette, nine parts). The following are available from Briggs and Stratton Corporation. Complete Overhaul, 6 and 8 Cubic Inch Aluminum Alloy Engines. (Slideset.) Engine Check-up Class, 6 and 8 Cubic Inch Aluminum Alloy Engines. (Slideset.) Start, Stop, Store. (Slideset.) Valve and Seat Reconditioning. (Slideset.) The following are available from Hobar Publications. Battery Ignition System. 405 (64 color slides with cassette and script, 34 minutes). 1974. Carburetor Laboratory. 404 (56 color slides with cassette, 24 minutes). 1973. Chain Saw Maintenance. 419 (53 color slides with cassette, 16 minutes). Magneto Ignition Laboratory. 402 (48 color slides with cassette and script, 28 minutes). Magneto Ignition System. 403 (69 color slides with cassette and script, 30 minutes). 1973. Small Engine Disassembly and Assembly Laboratory. 409 (80 color slides with cassette and script, 30 minutes). 1975.