1991 Yamaha Outboard Factory Service Manual 9.9 and 15 HP, Page 45Get this manual
CHAPTER 4POWER HEAD OVERHAUL DESCRIPTION41 PREPARATION FOR REMOVAL POWER HEAD REMOVALWiring removalNeutral throttle opening device Fuel pipeCooling water pilot hosePower head mounting bolt POWER HEAD DISASSEMBLYCOl magneto Magneto base Intake silencer, carburetor and fuel filter Reed valve Thermostat coverCylinder headOil seal housingCrankcase Crankshaft Piston pins and pistons,