I was going to say, my neighbor has essentially a brand new Yamaha 6 hp outboard kicker motor on his 12' aluminum dinghy and with him and I in there we were barely getting up on a plane. I doubt a 4 hp outboard kicker motor would do anything even remotely close to 7 knots with your 246, which has a dry weight without the motor at around 3,600 lbs. With the weight of the motor, half tank of fuel and moderately loaded I'd bet you're around 5k lbs, if not more. I kind of doubt that 4 hp kicker would do much of anything to help push it along.
