This thing will not fit under the floor on my 22 foot Aquasport. Actually I might be able to fit it if I cut a fair size access hole and put a access hatch in. There are two access hatches close by already and I dont think a third in close proximity is a good idea. I would rather run the hydraulic lines and electrical up to the center console and mount it there. The pump is the type with the two solonoids on it. I believe the trim pump is the Type A. The boat is used in salt water so having the pump and solonoids with almost no clearance between the boat bottom and the underside of the floor. Basically it would sit in the bilge and be in bilge water should it accumulate. Has anyone messed with a similar situation ?