Trojan Boat Forum

have another question , inside the bathroom on my f26 there are sliding plexiglass doors. one side is void and made to store things the other side has a yellow contraption mounted on an angled wood block. It has several 2" wide dryer type vent hose and I pulled out a long metal handle from behind it with a large black ball it fit into the "thing" and when I lifted the handle it appeared to raise and lower some kind of bellow. what the ****is this thing ?

A picture?

Sounds to me like a manual pump. Could be a bilge pump, or maybe it's a sewage transfer pump.