my 2002 232 br has the same problem.
it seems i am the only one that can figure out the lock, but when i lock it, it stays shut.
You'll hear me yelling expressives whenever we take off and just as we plane the door comes flying open and slams against the fiberglass.

i always give my Wife the stink eye when it happens.
Hey thanks for the tip Texas232, i didnt think about changing that snap to hold it better when it's open1
