I have a 16ft quinchita john boat with styrofoam blow in the sides how much motor do I need ? It says no more than 4.6 people at 150lbs. I don't have alot of money and was wondering how low of hp I can go . It had a 78 merc. 40 hp and the repair shop wanted a 1000.00 to replace the wiring harness from the ignition to motor and the inside wiring harness and I don't have that kind of money to replace something that old. If there is anyone who might this motor it's in my garage free of charge if you wanna come get !:smile2: It will have the steering console provided with it . I wanna go to a tiller steer to reduce the amount of exposed wires cables etc. just waiting to dry rot on me . It has brand new steering and throttle cables too ! I am not mechanically inclined so I am not gonna try and fix it myself ! thanks for any help !