Theft?
The one thing that amazes me, was already brought up. And thats if someone wants it bad enough, they'll get it.
I learned the hard way. I had restored a 1969 Chevy C-10, looked sharp, painted deep blue, had a high performance 350 with a posi trac 4:11 rear end.
I had a small two man boat with a trolling motor on it, in the back. I went out fishing and when I got back, my passenger side door was pried open with a big pry bar and the window was broken. All the damage to steal a $100 dollar Pioneer stereo. From that day forward, after the damage was repaired, I just left the doors un-locked. Figuring if they wanted it bad enough, I'd give them easy access, hoping they didn't tear up my truch to get it.
A jet ski?........sitting on a trailer, locked down to the drive way or with a wheel lock; if thieves spotted it, wanted it, they'd wait for the right moment, bring a truck and a couple buddies, lift it from the trailer and toss it in the back of their truck. They don't need to steal the trailer too!.........:cheers: