Hi and thank you for your question.
This is a most curious problem, especially your last statement that the last stator exploded. Considering the stator doesn't spin, that doesn't make sense. If the stator windings were damaged, something extraneous (foreign object) got in the stator flywheel/rotor area and got caught between them and damaged the windings.
I do have some questions that I need answered.
Why was the first stator replaced, meaning did it have insufficient electrical output or was it physically damaged?
Have all the stator failures been on the same engine?
Have you taken the cover off to inspect the stator this time?
Are you replacing the stator yourself or having a shop replace it?
What year is your LS2000?
Please understand I am not trying to point fingers here at who's to blame, I am merely trying to help you get to the bottom of the problem so you can enjoy your boat again. I am happy to share my experience with you but by no means am trying to belittle you or insult you. I am just trying to leave no stone un-turned. As professional technicians, sometimes customer information helps us diagnose a problem, sometimes, based on experience, we can tell by the resulting damage as to why a component failed.
Let me know the answers to those questions and we can move forward from there.