Do you want to service & repair your Yamaha F250, LF250 2006 yourself? We can help you with the official certified Service & Repair manual; just push the button INSTANT DOWNLOAD on the left side, download the file and you can start right away. This manual covers the following model(s): Yamaha F250 2006 LF250 2006 We only sell original manuals; the quality of the files is exceptionally good. When you print the file, the pictures are of good quality and very bright. WE DO NOT SELL ANY COPIED MANUALS, ONLY THE ORIGINAL!!!! In this manual you have the following chapters: General information How to use this manual Manual format Symbol Abbreviation Safety while working Fire prevention Ventilation Self-protection Part, lubricant, and sealant Good working practice Disassembly and assembly Identification Model Serial number Special service tool Feature and benefit ECM system Electronic fuel injection control system Ignition timing control system Knock control system Variable camshaft timing control system Electronic throttle valve control system Engine speed control system Lower unit Propeller selection Propeller size Selection Specification General specification Maintenance specification Power unit Lower unit Electrical Dimension Tightening torque Specified torque General torque Periodic check and adjustment Maintenance interval chart Top cowling Checking the top cowling Fuel system Checking the fuel joint and fuel hose (fuel joint-to-fuel injector) Checking the fuel filter Power unit Checking the engine oil Changing the engine oil using an oil changer Changing the engine oil by draining it Replacing the oil filter Checking the timing belt Checking the spark plug Checking the thermostat Checking the cooling water passage Control system Checking the engine idle speed Adjusting the throttle cable Checking the gear shift operation Bracket unit Checking the PTT operation Checking the PTT fluid level Lower unit Checking the gear oil level Changing the gear oil Checking the lower unit for air leakage Checking the propeller General Checking the anode Checking the battery Lubricating the outboard motor Fuel system Hose routing Fuel hose and blowby hose Vapor gas hose Cooling water hose Checking the throttle valve operation Checking the TPS Measuring the fuel pressure Checking the pressure regulator Reducing the fuel pressure Disconnecting the quick connector Draining the fuel Fuel filter Intake manifold Installing the intake manifold Installing the intake silencer Throttle body Checking the canister Checking the canister check valve Installing the throttle body Low-pressure fuel pump Checking the check valve Vapor separator Removing the fuel hose clamp Installing the fuel hose clamp Checking the vapor separator Fuel injector Installing the fuel injector Power unit Power unit Checking the compression pressure Checking the oil pressure Checking the oil pressure sensor Checking the valve clearance Adjusting the valve clearance Replacing the timing belt Removing the wiring harness guide Removing the power unit Removing the timing belt, driven sprocket, and camshaft Checking the timing belt and sprocket Checking the valve lifter Checking the camshaft Installing the camshaft, driven sprocket, and timing belt Starter motor and accelerator position sensor ECM Fuse box Junction box Exhaust cover Removing the exhaust cover Checking the exhaust cover anode Installing the exhaust cover Cylinder head Removing the cylinder head Checking the valve spring Checking the valve Checking the valve guide Replacing the valve guide Checking the valve seat Refacing the valve seat Checking the cylinder head Installing the valve Removing the cooling water passage cover Checking the cooling water passage cover anode Installing the cooling water passage cover Installing the cylinder head Crankcase Cylinder block Cylinder block Disassembling the cylinder block Checking the piston diameter Checking the cylinder bore Checking the piston clearance (reference) Checking the piston ring Checking the piston ring end gap (reference) Checking the piston ring groove Checking the piston ring side clearance Checking the piston pin boss bore Checking the piston pin Checking the connecting rod small end inside diameter Checking the connecting rod big end side clearance Checking the crankshaft Checking the crankpin oil clearance Selecting the connecting rod bearing Checking the crankshaft journal oil clearance Selecting the main bearing Disassembling the oil pump Checking the oil pump Assembling the oil pump Assembling the power unit Installing the wiring harness Installing the power unit Lower unit Lower unit (regular rotation model) Removing the lower unit Removing the water pump and shift rod Checking the water pump and shift rod Propeller shaft housing (regular rotation model) Removing the propeller shaft housing assembly Disassembling the propeller shaft assembly Disassembling the propeller shaft housing Checking the propeller shaft housing Checking the propeller shaft Assembling the propeller shaft assembly Assembling the propeller shaft housing Drive shaft and lower case (regular rotation model) Removing the drive shaft Disassembling the drive shaft housing Disassembling the forward gear Disassembling the lower case Checking the pinion and forward gear Checking the bearing Checking the drive shaft Checking the lower case Assembling the lower case Assembling the forward gear Assembling the drive shaft housing Installing the drive shaft Installing the propeller shaft housing Installing the water pump and shift rod Installing the lower unit Shimming (regular rotation model) Shimming Selecting the pinion shim Selecting the forward gear shim Selecting the reverse gear shim Selecting the propeller shaft shim Backlash (regular rotation model) Measuring the forward and reverse gear backlash Lower unit (counter rotation model) Removing the lower unit Removing the water pump and shift rod Checking the water pump and shift rod Propeller shaft housing (counter rotation model) Removing the propeller shaft housing assembly Disassembling the propeller shaft housing Checking the propeller shaft housing Checking the propeller shaft Assembling the propeller shaft housing Drive shaft and lower case (counter rotation model) Removing the drive shaft Disassembling the drive shaft housing Disassembling the reverse gear Disassembling the lower case Checking the pinion and reverse gear Checking the bearing Checking the drive shaft Checking the lower case Assembling the lower case Assembling the reverse gear Assembling the drive shaft housing Installing the drive shaft Installing the propeller shaft housing Installing the water pump and shift rod Installing the lower unit Shimming (counter rotation model) Shimming Selecting the pinion shim Selecting the reverse gear shim Selecting the forward gear shim Selecting the propeller shaft shim Backlash (counter rotation model) Measuring the forward and reverse gear backlash Bracket unit Shift rod and bottom cowling Upper case and steering arm Removing the upper case Disassembling the upper case Checking the drive shaft bushing Disassembling the oil pan Checking the oil strainer Assembling the oil pan Assembling the upper case Installing the upper case Removing the steering arm Installing the steering arm Clamp bracket and swivel bracket Removing the PTT unit Removing the clamp bracket Installing the clamp bracket Installing the PTT unit Adjusting the trim sensor PTT unit Checking the hydraulic pressure PTT motor Disassembling the PTT motor Checking the PTT motor Assembling the PTT motor Gear pump Disassembling the gear pump Checking the gear pump Checking the gear pump housing Checking the reservoir Checking the filter Assembling the gear pump Tilt cylinder and trim cylinder Disassembling the tilt cylinder and trim cylinder Checking the tilt cylinder and trim cylinder Checking the valve Assembling the tilt ram Assembling the trim ram Installing the tilt cylinder Installing the trim ram Installing the PTT motor Installing the reservoir Installing the tilt ram Bleeding the PTT unit Bleeding the PTT unit (built-in) PTT electrical system Checking the fuse Checking the PTT relay Checking the PTT switch Checking the trim sensor Electrical system Checking the electrical component Checking using the YDIS Measuring the peak voltage Electrical component Port view Starboard view Fuse holder Aft view Aft view Top view Wiring harness routing Port view Starboard view Aft view Aft view Top view Ignition and ignition control system Checking the ignition spark Checking the ignition coil input voltage Checking the crank position sensor Checking the crank position sensor air gap Checking the intake air temperature sensor Checking the intake air pressure sensor Checking the engine temperature sensor Checking the thermoswitch Checking the shift cut switch Checking the neutral switch Checking the knock sensor Checking the engine start switch Checking the engine stop lanyard switch ECM and electronic throttle valve control system Checking the main relay and electronic throttle valve relay Checking the ECM circuit Checking the electronic throttle valve and TPS circuit Checking the electronic throttle valve motor Checking the accelerator position sensor circuit Checking the accelerator position sensor Variable camshaft timing control system Checking the cam position sensor Checking the oil control valve Fuel control system Checking the fuel injector Checking the low-pressure fuel pump and high-pressure fuel pump Checking the high-pressure fuel pump relay Checking the vapor shut-off valve Starting system Checking the fuse Checking the starter relay Starter motor Disassembling the starter motor Checking the starter motor pinion Checking the armature Checking the brush Checking the magnet switch Checking the starter motor operation Charging system Checking the stator coil Checking the Rectifier Regulator Troubleshooting YDIS Introduction Connecting the communication cable to the outboard motor Troubleshooting the power unit Troubleshooting the power unit using the YDIS Trouble code and checking step Troubleshooting the power unit using the diagnostic test lead Troubleshooting the power unit (trouble code not detected) Troubleshooting the PTT unit Troubleshooting the lower unit Language: english Format: PDF Pages: 386 If you have a request, dont hesitate to ask us