Should have a round porthole near or on the floor. Pry the lid off with a screwdriver if there is no handle. You probably have to feel around in there to un clip it from the base of the pump
On my FV250 (2003) it is under the mattres directly under the stairs and in that porthole it is located to the starboard side of the shower sump. Under the pipes. (the sump is the white stuff on the right sid in the pic, the pipes are remowed)
Seems that most Rinker models have the forward bilge, as well as the head through hull and AC through hull under the mattress in the aft cabin. Similar question was asked for a variety of models in past, and from my member it's always come back to being under the mattress, including in my Rinker 260 EC.
Comments
(the sump is the white stuff on the right sid in the pic, the pipes are remowed)
Boat Name: King Kong
"Boat + Water = Fun"