Fourstroke small fuel internal combustion engine model designed for classroom and laboratory use. This compact gasoline engine model makes core engine principles tangible and repeatable for teaching, demonstration, and experimental work. Key benefits Clear demonstration of the fourstroke cycle: intake, compression, combustion, and exhaust are visible through moving components to reinforce theoretical lessons with handson observation. Real operating behavior: runs on gasoline fuel and reproduces the mechanical movements and timing of a fullsize fourstroke engine, helping students and trainees understand combustion engine operation. Durable construction for repeated use: precisionmachined components and metal construction provide reliable performance for classroom demonstrations and lab experiments. Easy integration into teaching setups: compact form factor and standard mounting points make it suitable for bench displays, experimental rigs, and teaching apparatus. Practical learning tool: supports instruction in mechanical engineering, automotive technology, thermodynamics, and vocational training by providing a physical reference for valves, pistons, crankshaft, camshaft, and timing mechanisms. Features and attributes Function: working fourstroke internal combustion gasoline engine model that demonstrates engine cycles and mechanical linkages. Compatibility: intended for school teaching tools, equipment, and laboratory supplies; compatible with typical educational engine stands and test benches. Size and form: compact, desktopfriendly footprint for easy placement in classrooms and labs; designed for clear visibility of moving parts. Materials: metal and engineered components selected for durability and repeatable demonstration use. Performance: smooth mechanical operation that accurately illustrates timing relationships, valve action, and piston movement under typical smallengine conditions. Maintenance: accessible components for routine inspection, adjustment, and demonstration of simple maintenance tasks. Use scenarios Classroom demonstration: place on a lab bench to show the fourstroke cycle in real time while explaining intake, compression, power, and exhaust stages. Laboratory experiment: integrate with measurement instruments to examine timing, mechanical efficiencies, and basic thermodynamic responses during controlled runs. Vocational training and hobbyist instruction: use in handson modules for engine assembly, disassembly, and basic troubleshooting exercises. Notes Intended as an educational model for demonstration and instruction in engine principles and mechanical operation. Supplied as a model engine unit for use with standard educational equipment and fixtures.