The switch (pushbutton) is the first thing I'll check. The bike sat outside a couple nights at the marina and got moisture (salty air) on it. I washed it before I left, but I'll get the ol' WD 40 out on the switches.
I read your questions about the outboard motors and Fred covered it pretty damn good, if ya need more, there is a boating forum I go to sometimes and they love diving into (pun) those kind of questions.
here it is:
www.goboatingamerica.com ( click on powerboat forum)
but if you have a neighbor that is in the business, you're only a stroll away.
swim and deploy