I have a 1993 Force 70 by Mercury/Mariner. The serial number is OE023524. I bought a Mercury/Mariner 1990-1994 repair manual. States that it covers 40-125hp. I figured the 70 represented the hp. The manual goes up tp 65hp then jumps to 75hp and up. It is the classic black color and plainly has printed on the front and back of the cowl "Force by Mercury/Mariner". Where did I go wrong?