Chainsaw Repair

Either way that 7900 I'm sure the piston broke as I have seen rods that look like that before  just not on a 7900 , If a guy is really going to use a saw to block firewood with it has to be built to handle all the heat a motor is going to make , Not sure if any one else does this but on a new saw I will cut cookies hard with it then place my hand above the bar cover side plate and feel how hot the heat is coming of the jug , the flywheel will blow the heat out on your hand , if the heat is real hot then she is to hot for a worksaw in most cases