Yamaha F50A Service Manual page 75

CHK
ADJ
Special service tools .....................................................................................3-1
Maintenance interval chart............................................................................3-3
Top cowling .................................................................................................... 3-4
Checking the top cowling...........................................................................3-4
Fuel system .................................................................................................... 3-4
Checking the fuel joint and fuel hoses (fuel joint-to-carburetor) ................ 3-4
Checking the fuel filter ............................................................................... 3-5
Power unit....................................................................................................... 3-5
Checking the engine oil .............................................................................3-5
Replacing the engine oil ............................................................................3-5
Checking the timing belt ............................................................................3-7
Replacing the timing belt ...........................................................................3-7
Checking the valve clearance.................................................................. 3-10
Checking the spark plugs ........................................................................3-11
Checking the thermostat..........................................................................3-12
Checking the cooling water passage.......................................................3-13
Control system ............................................................................................. 3-13
Checking the throttle cable operation ......................................................3-13
Checking the gearshift operation............................................................. 3-14
Checking the engine idle speed ..............................................................3-15
Checking the ignition timing..................................................................... 3-15
Power trim and tilt unit ................................................................................ 3-16
Checking the power trim and tilt operation .............................................. 3-16
Checking the power trim and tilt fluid level .............................................. 3-16
Lower unit ..................................................................................................... 3-17
Checking the gear oil level ...................................................................... 3-17
Replacing the gear oil.............................................................................. 3-17
Checking the lower unit (for air leakage) ................................................. 3-19
Checking the propeller............................................................................. 3-19
General..........................................................................................................3-19
Checking the anodes............................................................................... 3-19
Checking the battery................................................................................ 3-20
Lubrication ...............................................................................................3-21
62Y3A11
Periodic checks and adjustments
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