Does anyone know the name, model number and year of this chain saw? It ran well but stopped working. I think the culprit is the ancient filter that looks like rolled up cotton which was clogged. I misplaced the on and stop switch. Will it stop it from starting? I would like to find another switch. There is a single black wire coming from the motor up to where the switch was. The copper metal next to the filter in the picture was inside where the switch would go. Thanks in advance.