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


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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
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