Help me diagnose my engine suddenly dying

I have a 2002 Pantera Classic with a 2002 Mercury 2.5L EFI. Every now and then, the engine will die for no apparent reason. What is weird is that I can immediately start it after this occurs. This is not one of those issues that you can take to a shop to be diagnosed unless the tech has seen this before because the engine never does this when idling and even if it was being water tested, it might not do it again until next year. I am hoping that somebody here has experienced this and can point me in the right direction. It is easier to list the details below to hopefully answer all questions.1. The engine dies abruptly. There is no sputtering or signs that the engine is going to die. It dies in the same manner as if you turned they key off or pulled the kill switch.2. The engine will immediately start again. There is no delayed time is getting it to crank.3. It may do this one time a year, or it may do this 4 times on one trip. The problem has never been consistent.4. There has never been any work done to this engine other than maintenance. 5. I have owned the boat since 2009. It has always done this at least once a year since I bought it. It had low hours when I bought it (41) and still has low hours (around 200). 6. It will not die when idling or fast idling (not on plane). It will die at a higher RPM range on the hole shot or when on plane. It has occurred even after driving on plane for several minutes. I posted about this issue many years back and was not able to get an answer. Hopefully somebody has experienced this and been able to remedy it since then. Thank you for any help!