BY Service Manual TABLE OF CONTENTS Page Safety .................................................................................................... 2-1 Safety Precautions .......................................................................... 2-2 General Service Information .............................................................. 3-1 Safety Precautions .......................................................................... 3-3 Engine Outline Drawings................................................................. 3-4 4BY2 (Inboard) ..........................................................................
3-4 4BY2 (Stern Drive) .................................................................... 3-5 6BY2 (Inboard) .......................................................................... 3-6 6BY2 (Stern Drive) .................................................................... 3-7 Engine Piping Diagrams.................................................................. 3-8 4BY2.......................................................................................... 3-8 6BY2.......................................................................................... 3-9 Location of Nameplates.................................................................
3-11 Engine Nameplates (Typical) .................................................. 3-11 Diesel Fuel .................................................................................... 3-12 Diesel Fuel Specifications ....................................................... 3-12 Bleeding the Fuel System........................................................ 3-14 Engine Oil...................................................................................... 3-14 Engine Oil Specifications......................................................... 3-14 Acceptable Engine Oil .............................................................
3-16 Recommended Marine Gear or Stern Drive Oil....................... 3-18 Recommended Power Steering Fluid...................................... 3-18 Engine Coolant.............................................................................. 3-19 Engine Coolant Specifications................................................. 3-19 Acceptable Engine Coolant ..................................................... 3-20 Principal Engine Specifications ..................................................... 3-21 BY Service Manual iii © 2009 Yanmar Marine International