Just came across this site while web-searching my problem. I have a 2003 yamaha 75 hp outboard with a 703 remote control box. Yesterday I put the key in the ignition and it wouldn't turn - it just seems locked in place. I moved the throttle around and back to the neutral position and tried again - nothing. I sprayed some wd40 in the lock, wiggled and jiggled the key, tapped the control box, moved the idle lever up and then back down, tried my spare key in the switch - nothing. Anyone have this problem? Is it a main switch replacement I'm looking at for repair? If so, is it a simple fix or is it a trip to my boat mechanic. Thanks in advance.