Outboard Engine Problem, Help!!!

OK, I need some help. I have a 21 ft Seaswirl with a Johnson 130 outboard. I was out fishing on Saturday, everything was fine. I stopped on the way in to make a few casts, and when I went to start up again, nothing. I eventually had to get a tow from SeaTow. (Thank God for tow insurance). I can't figure out what is wrong. I get absolutly nothing when I try to start the motor. All of the other electrical systems are fine. I don't believe it is the starter, or the batteries, nothing happens at all when I turn the key (no clicking of the starter, just silence). All of the wireing looks fine, I checked the connections to the battery, and they are fine. My guess is either a simple loose wire that I haven't found, or possible a problem with the shifter.
Any ideas would be greatly appreciated.