Yamaha F150B Service Manual

Also see for F150B: Owner's manual Service manual Owner's manual

TECHFEA012345678910ATechnical features and description 2Electronic control system ....................................................... 2-1Engine ECM component ........................................................... 2-2Sensor, switch and actuator ...................................................... 2-4Electronic fuel injection control system ..................................... 2-5Ignition timing control system .................................................. 2-10Engine speed control system .................................................. 2-13Idle speed control .................................................................... 2-16Fail-safe control ....................................................................... 2-17Power unit system .................................................................. 2-18Outline of system ..................................................................... 2-18Lubrication system ................................................................. 2-22Cooling system ........................................................................ 2-24Intake and exhaust system ................................................... 2-27Idle exhaust system ................................................................. 2-28PTT unit ...................................................................................... 2-29Trim-up and tilt-up function ...................................................... 2-29Trim ram retraction function .................................................... 2-30Trim-down and tilt-down function ............................................ 2-31Stationary condition ................................................................. 2-32When the outboard hits something in the water ...................... 2-32