inputs.text: good manual not outstanding - good manual not outstanding yet worth price general reference no way even close level authorized merc factory manual purchased manual working early 94 25 hp powerhead pre mercosil found specifications detail 25 hp engine lacking fort example no exploded diagram 25 hp crankshaft assehembly listed cylinder compression 25 60 hp shown no 15 psi variation cylinders size powerheads seehem get somewhat better attention detail section covering lower unit gearcase much betteryou may want review book buying make sure specific information may looking included