I have heard of some people building a bracket that fits over the bilge area. On older BassCats, the chargers were mounted on the inside back transom wall.The MK 330 I have now on my 96 Eyra, is mounted in the rear floor area behind the driver, next to the oil reservoir.Of course with any mount area, always seal old screw holes to prevent water intrusion. Also measure exactly the area for mounting at least twice before adding more holes. Seal new areas with a sealant then place screws in while curing. There may be other things to do, but these I remember.96 Eyra/12 Mercury 175 Pro XS with 2015 single axle trailer2017 Victory Gunner