Engine KeyRing V2.0

KeyRing of a combustion engine with turning crankshaft and moving piston.Release 2.0 d.d. 28-8-2025: improved clicking of crank cheek/crank case and piston pin/crank cheek.PrintingNo supports.I printed with PLA+, layer height 0.15 mm.AssemblyUse some grease or oil on the moving parts for a smooth operation.No glue.Click the piston in the cylinder, and the crankshaft in the crankcase.OperationPut your finger on the round button and turn the crankshaft.