The Husqvarna 506413202 Piston transfers combustion force to the connecting rod, helping drive the engine’s operating cycle. Moving up and down inside the cylinder, the piston compresses the fuel-air mixture and responds to combustion pressure to produce mechanical motion. Proper piston function supports engine performance and consistent operation. Replacing a worn or damaged piston c... https://www.wholetoolbox.com/husqvarna-506413202-piston/506413202.html