Yamaha F100B F100C Outboards Factory Service Manual, Page 53Get this manual
Periodic checks and adjustments
Special service tools .3-1 Maintenance interval chart3-2 Top cowling 3-4 Checking the top cowling.3-4 Checking the hour meter .3-4 Fuel system 3-4 Checking the fuel joint and fuel hoses (fuel joint-to-carburetor) 3-4 Checking the fuel filter 3-4 Power unit3-5 Checking the engine oil .3-5 Changing the engine oil.3-5 Checking the timing belt 3-7 Replacing the timing belt .3-7 Checking the valve clearance 3-7 Checking the spark plugs 3-7 Checking the thermostat3-8 Checking the cooling water passage.3-8 Control system 3-9 Checking the throttle cable operation 3-9 Checking the gearshift operation3-10 Checking the engine idle speed 3-10 Checking the ignition timing3-11 Power trim and tilt unit 3-12 Checking the power trim and tilt operation 3-12 Checking the power trim and tilt fluid level 3-12 Lower unit 3-13 Checking the gear oil level 3-13 Changing the gear oil 3-13 Checking the lower unit (for air leakage) 3-14 Checking the propeller3-14 General3-14 Checking the anodes3-14 Checking the battery 3-15 Lubrication .3-16