1991 Yamaha Outboard Factory Service Manual 9.9 and 15 HP, Page 71Get this manual
2 Place the three seal rubbers on the bottom cowlingFully open the throttle grip
63Place the gasket on the bottom cowling so that the dowel pin holes align with the dowel pins
Remove the engine from the engine stand and insert the drive shaft into the crankshaft
12If the splines will not completely mesh, pu II the starter rope littleBe sure to insert the throttle link lever shaft into the pinion in the bottom cowling