Checking the Engine Oil .................................. 24Adding Engine Oil .......................................... 24Marine Gear or Sail-Drive Oil ................................... 25Marine Gear Oil Specifications .......................... 25Sail-Drive Oil Specifications - SD20 .................... 25Checking Marine Gear Oil ................................ 25Adding Marine Gear Oil ................................... 26Checking and Adding Sail-Drive Oil .................... 26Cranking the Engine Manually ................................. 26Cranking the Engine Electrically ............................... 27Recheck the Engine Oil ................................... 28Daily Checks ....................................................... 28Visual Checks ............................................... 28Checking Diesel Fuel and Engine Oil .................. 29Checking and Refilling Marine Gear Oil ............... 29Checking the Battery Electrolyte Level ................ 29Checking the Alternator Belt ............................ 29Checking the Throttle and Shift Console .............. 29Checking the Warning Indicators ....................... 29Preparing Fuel, Oil and Coolant in Reserve .......... 29Engine Operation ...................................................... 31Starting the Engine Electrically ................................. 32Starting the Engine Manually ............................ 33Restarting After Starting Failure ......................... 34Starting at Low Temperatures ........................... 34After the Engine Has Started ............................. 34Throttle and Shift Lever Operation ............................ 36Acceleration and Deceleration .......................... 36Shifting the Engine ......................................... 36Precautions During Operation .................................. 37Shutting Down the Engine ....................................... 38Checking the Engine After Operation ......................... 39Periodic Maintenance ................................................ 41Safety Precautions ................................................ 41Precautions ......................................................... 43The Importance of Periodic Maintenance ............. 43Performing Periodic Maintenance ...................... 43The Importance of Daily Checks ........................ 43Keep a Log of Engine Hours and Daily Checks ..... 43Yanmar Replacement Parts .............................. 43Tools Required .............................................. 43TABLE OF CONTENTSiv GM Series Operation Manual© 2007 Yanmar Marine International