If I kept my boat at a marina and/or just purchased the boat locally,
I'd change the ignition switch promptly, even if it was working
properly.
The ignition switch on a boat is just to turn it off when you stop. It
certainly isn't stopping a thief, even a joy rider.
Most 2 strokes will start if you unplug the cable to the controller
and jump out the solenoid. (or pull the rope)
Exactly. The best security for most boats is to use a plastic coated
steel security cable from a cleat on the boat to somewhere on the dock
that it is not easily removed or cut. Disk type stainless steel
padlocks offer good protection against bolt cutters.
The best security is a yacht insurance policy with agreed upon full
value. :)