1991 Yamaha Outboard Factory Service Manual 9.9 and 15 HP, Page 24Get this manual
1Magneto control lever stopper 3Lock nut
2Adjust bolt
3Lock nut
4Adjust bolt
Neutral starting device adjustment 1Set the shift handle to neutral
3Turn the shift handle to Forward or Reverse and, by pulling the starter rope, check to see that the starter is lockedIdle speed adjustment 1Turn the pilot screw until it is lightly seated2Turn out the pilot screw to specificationPilot screw (turns out): 9.9N 1-12 14 15N 1-38 14