When I first got this ‘95 SPI, I cleaned out the hull, rode it for a while,then cleaned it again.
I found one of the plastic wing nuts that hold the guard over the drive shaft, plus a couple of SS hex bolts, looked like they fit the flame arrestor, damn glad the POwner didn’t drop them down the carb.
I have,(and so is everyone who is honest), dropped stuff into the bowels of their ski. In my experience, after some hard riding, the loose bits will work their way to the lowest point, usually around the pickups for the bilge drain.
It can be kind of slimy down there, especially on a 2 stroke, get a kid with flexible joints & small hands,(put on nitrile gloves), & feel around/under everything you can.
As stated, magnets won’t work on any bolts/washers.
When working in your ski, cover any “kill ya” openings, (Carb, fuel tank etc), with a clean rag to prevent making a lot more work for yourself.