1991 Yamaha Outboard Factory Service Manual 9.9 and 15 HP, Page 17Get this manual
Throttle grip Check the throttle grip for smooth operationThe grip should be smooth yet tight enough to stay in position when the hand is releasedIf not, adjust itShift handle Check the shift handle for smooth operation (forward, neutral and reverse) Check the neutral starting device and neutral throttle opening device for proper operationTilt lever Check the tilt lever for proper operationRelease position: The motor can tiltLock position: The motor cannot tilt
DELIVERY When the outboard is delivered to the new owner, make sure he is familiar with all the operating controlsAdvise him of break-in proceduresLet him know if there are any service or operational problems peculiar to his locale that may require extra attention on his part
PERIODIC INSPECTIONS AND ADJUSTMENTS
Introduction
Steering Check the steering for smooth operationTightening the friction bolt makes the steering handle stiff to turnElectrical Make sure correct