Functional 4-Stroke Engine

This is a single-cylinder four-stroke engine with functional valves. Good for educational purposes or just having a nice toy to play around. The assembly process is simple yet fun with only minimum amount of non-printed parts needed. Please refer assembly guide for location of parts and part list. When assembling, make sure to align timing marks in the 3 gears. If not aligned, collision between piston and valves can happen. Printing all parts (with my print profile) takes around 14,5h with 357g