Fuel problems are seldom instant and seldom recover and then happen again. Electrical problems can be instant and recover instantly only to do it again. For instance if a fuel pump quits it takes awhile for the fuel level to go down and the power will drop of as the engine leans out. I always tell my guys to do all the things that are overdue anyway. A plug never hurts and they are cheap. A fuel filter never hurts and they are cheap. Same way with air filter. If the engine dies instantly it is usually lose of spark. A coil can get hot and do that and recover when it cools but the advice you have been given on the switch sounds most likely. I have replaced the switches before and they are not too bad to get to and replace. They are available on Amazon with part numbers to insure correct parts.
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