Ive noticed two things about efco switches....they suck and are unreliable due to their design. Once a year I have to take each switch apart and clean its contacts and then reassemble. In the back it has "vents" or holes for some reason.....anyways...on EVERY one of my efco switches...they get packed with saw dust fines and no longer make contact......once i clean them they shut the saw off again for about a year..other wise i have to use the choke to kill the saw.....do that for a year and see how much carbon builds up in the saw....also this sometimes cracks the back of the muffler around the screw holes.(super hot then doused in cool gas....I heard mine crack..it popped and made a hell of a sound) Ive even packed the switches with light bulb grease(silicon grease)....ive even sealed the back off with silicon sealant....fines still get in through the front even with the rubber thing still on the switch. Hope that helps those with efco switch problems....I recommend measuring the switch and hit up a company called mousers............its a place that will sell on/off switches for any app....its where mfg's get their switches alot of the times.
Mouser Electronics - Electronic Component Distributor Just know what size u need and the correct 2 prong connector....there are about 1.5 million different ones...lol
