The engine pan is separate from the hull, actually part of the floor liner molding that comprises the entire area around the engine, engine bed, and shower sump forward of it. Water can get into it from the engine itself, whether leaking sea water or coolant. It can come from the rudder tube, the emergency tiller screw cap, a badly sealed pedestal, an open lazarette or sail locker hatch. The engine liner pan fits close to the hull at it's aft end leaving an opening about 2 1/2" to 3" wide and maybe 1/4" high. If munge plugs it up the water backs up and goes into the pan instead of under it and into the bilge. I clean under mine every couple of seasons with a reasonably high pressure water hose (not a pressure washer). My boat is an 83 and I can assure you it has no hole. I have swapped engines on my boat, cleaned the pan and filled it with hose water in the process. It is at least comforting to know that if the engine were to fragment itself and spill it's fluids at least they would not drain into the bilge and be pumped out into Barnegat Bay. If you want I can shoot pictures.
The shower sump (which is part of the liner back there including the engine pan and beds) is very shallow relative to the drain passage from the floor in the head. The design of the head floor doen not make for good complete drainage. Couple that with the pump in the sump (nothing more than a small bilge pump) leaves about 1/2" or so of water in the pan and you can have that water from the sump making it back from the sump. One of these days I'm going to stick a live well pump into the floor drain hole and see if it will clear the floor any better that the sump pump. each time I pump the holding tank I take the opportunity to hose down the floor in the head and I get the water sloshing around for quite some time.
As to your boom; The line going up into the center opening of the forward end of your boom should be your out haul. It connects to a small tackle inside which enables you to generate some serious pull o the clew. I learned this the hard way when I was bending on the main the first time I got the boat into the water when I bought it. I pulled a couple of feet of the out-haul wire out and the boom sucked in the bitter end of the line. I had to drill it apart, re-reeve it, tap threads where the rivets had been and screw it back together. And drew serious blood pinching skin between the boom and casting. My feeling is "The boat isn't yours till you spill your own blood onto it. That leaves the other line which should be for the out-haul for your first reef. I've never seen a 33 (C) that had a second reef on the original equipment main sail.
