I put the key in and maybe 1 out of 10 times it wont turn to start the engine. When I pull it out and put it back in 2-3 times it will turn. I tried my spare key and it still happens. I have W2-40'd it with no help. I am out in the wilderness a lot and don't want to get stranded. is it the switch or has the interlock cable shown this as a problem? What are the steps to replace the switch?