Yamaha F100B F100C Outboards Factory Service Manual, Page 31Get this manual
Propeller selectionPredelivery checks NOTE: If the engine oil is above the maximum level mark a, drain sufficient oil until the level is between and If the engine oil is below the minimum level mark b, add sufficient oil until the level is between and bRecommended engine oil: 4-stroke motor oil API: SE, SF, SG, or SH SAE: 10W-30, 10W-40, or 20W-40 Oil capacity: Without oil filter replacement: 4.5 (4.8 US qt, 4.0 Imp qt)
S60C1130
CAUTION:
This is 4-stroke engineNever use premixed fuel
Checking the battery
1Check the capacity, electrolyte level, and specified gravity of the batteryBattery capacity: 70100 Ah Minimum cold cranking performance: 380 Electrolyte specific gravity: 1.28 at 20 (68 F) 2Check that the positive and negative battery leads are securely connected