Does anyone know where the transducer location for the o.e.flasher is? I have a 1998 zx176,purchased this past spring.I have found 3 puck transducers,2 in the transom area and one under the first storage area between and forward of the consoles,under the drivers seat is a metal plate(round)..?....the three pucks look aftermarket to me,but I'm not sure...any help much appreciated