1973 Evinrude Norseman 40 HP Service Manual, Page 8Get this manual
CLEARANCE CHART POWER HEAD Piston ring gap Piston ring groove clearance, lower .017 Max- .007 Min.0040 Max- .0015 MinRear eve rs gear .0020 Max- .0005 Min to ear bushing Reverse gear bushing to propeller shaft Prope ller on shaft at drive pin hole Roller Prope lle on shaftabove the shoulder .0069 Max- .0034 Min0015 Max- .0005 MinPrope ller shaft in fr ont gear bushing .0020 Max- .0010 Min
0006 Max- .0001 Min Piston pin to pistonloos nd Cylinder and piston Crankshaft nd play LOWER UNIT Dri veshaft upp .0050 Max- .0030 Min.011 Max- .003 Min.007 Max- .003 Min
TORQUE CHART
POWER HEAD Flywheel nut Connecting rod screw Cylinder head screws 100105 Foot-pounds 348372 Inch-pounds (2931 Foot-pounds) 168192 Inch-pounds LOWER UNIT Side mounts upp er nd lower nuts Fron ount upp er nut Pilot shaft to steering bracket screws Pull at propeller shaft for tilt up lower units Pull at propeller shaft to overcome reverse lock STANDARD SCREWS NOTE Inch- Pounds No6 No.8 No10 No12 1 4'" 5-16'" 387-10 15-22 25-35 3540 60-80 120-140 220-240 Foot- Pounds 150170 In -pounds (1214 Foot-pounds) 240320 Inc h-pounds (2026 Foot-pounds) 120140 Inch-pounds (1012 ",foot-pounds) 180 Foot-pounds MinCrankcase to cylinder screwsupper and lower 150170 Inch-pounds center 162168 Inch-pounds Electric starter through bolts Spark plug Starter housing screws 50 Inch-pounds 17-120-1Foot-pounds 96120 Inch-pounds (810 Foot-pounds)