Yamaha F100B F100C Outboards Factory Service Manual, Page 55Get this manual
Special service toolsMaintenance interval chart Maintenance interval chart Use the following chart as guideline for general maintenanceAdjust the maintenance intervals according to the operating conditions of the outboard motorInitial
50 hours (3 months) 100 hours (6 months)
500 hours (every 30 months) 1000 hours (every years) 200 hours (1 year)
Remarks
Top cowling Top cowling fit Fuel system Fuel joint and fuel hoses Fuel filter Fuel tank(1) Power unit Ignition timing Engine oil Oil filter Oil pump Timing belt(2) Valve clearance Spark plugs Piston rings Thermostat Pressure control valve Oil leakage Flywheel magnet nut Carburetor(3) Motor exterior Cooling water passage(4) Control system Carburetor link Throttle cable Shift cable Engine idle speed Power trim and tilt unit Power trim and tilt unit