Thanks for the update.
If you haven't already you may want to consider one of the new electronic devices that will help you locate your vessel and motor if it mysteriously disappears. If you ask or use the search device there have been discussions on this.
Thefts of boats and motors are a problem everywhere that you will need to protect yourself from. Especially nice new boats and motors. When I bought my nice new Yamaha engine for my tender the first thing I did was paint the engine cover yellow so I could spot it anywhere. My wife thought I lost my mind but that and other precautions kept me united with my possessions. It looked a little odd but what the hell.
Today there are more sophisticated methods that you could use. Good luck