I have been curious about this as well.
I can't find the page in the manual that talks about this.
I looked up some parts:
295 501 139 Brass insert screw kit, does anyone know how many parts come in this kit?. I have searched the Internet and can't find the answer
293 450 345 Brass insert
250 000 628 M6 x 20 screw
291 003 793 Plastic insert, I never actually looked for or at these when my top was off last.
In the past, I've taken the top off of my 2015 2UP to install the manual reverse and another time to install the depth finder. No problems! Last summer, my Spark started leaking from one of those metal strips on the bottom. BIG problem because the engine had to come out! Luckily it was under warranty! But the dealer made a mess of things (a big mess), which is a long story that I should tell some day. Anyway, I now have some of those threaded screws that spin thanks to the uncaring dealership.
According to some of the BRP drawings, there are 13 of those plastic inserts.
So it seems like maybe you could replace some or all of the plastic inserts and reuse the same screws OR put in a brass insert and use new M6 x 20 screws. I wonder if the kit handles all 13 and if Sea Doo thinks that this is the better way to go?. I also wonder about the torque.
I guess I'm looking for some more information so I could order some parts BEFORE I take the top off.
Thanks ahead of time!