i have a 1954 Evinrude Fleetwin 7.5hp...this guy is wanting to trade a Johnson 20hp for a 5hp, and he agreed to trade with me...would i be crazy to put that on a boat rated for 5hp? i know it mostly depends on the widest point on your boat, but i did put a solid oak transom in...the motor only weighs 20 or so more pounds than mine....and i've had 2 guys and anchor fishing stuff ect..and it did fine...what do you all think?