In that photo, the MAG side is not installed correctly. it would go under the pipe
FWIW, I've found those flaps in storage buckets, down in the bottom of the hull, and/or missing more often than i've found them installed correctly. So you are not alone
the diaper is a good idea as well, do you have one?
this youtube might help give you a full size view (skip to 1:30)
[video=youtube;LAbv0cmCPvE]https://www.youtube.com/watch?v=LAbv0cmCPvE[/video]
So are those flaps supposed to go under the exhaust pipe or over like in that video? I would think if that gasket goes, then water would shoot right to the carbs with the flaps up like here. And to answer your question on if I have one of those diapers... No. Should I get one and if so anyone have the part #?