I acquired a MSW 42 portable spot welder today and have a question.

Is the on/off switch supposed to stay in the on or off position when activated ?

Reason I ask is mine won't stay in the "on" position unless it's held there --

makes it hard to squeeze the tongs while holding the switch on.

Is that normal ? If not, is there a repair that can be done to the switch, or am I out $80 to replace it?