1968 Evinrude Ski-Twin, Ski-Twin Electric 33 HP Outboards Service Manual, Page 8Get this manual
CLEARANCE CHART POWER Piston ring gap 017.007 Min- .0045 MinRear reverse gear .0020 to bushing.0001 Min- .0030 Min- .007 Minshaft .007 at drive pin hole shaft .0069above the shoulder.0034 Min- .003 MinRear gear bearing .0025 to shaft.0005 Min- .0005 Minshaft in front gear bushing .0020.0010 Min
Piston ring groove .007 clearance .0006 Piston pin to pistonloose end Cylinder and piston Crankshaft end play LOWER UNIT Driveshaft .0045 .011
TORQUE CHART
POWER Flywheel nut Connecting rod screw Cylinder head screws 100105 Foot-pounds 348372 Inch-pounds (2931 Foot-pounds) 168192 Inch-pounds Pilot shaft to steering bracket at shaft for tilt lower units at shaft to overreverse lock STANDARD SCREWS When tightening two screws the same part, DO NOT tighten screws completely, one at timeavoid distortion of the part, first tighten screws together to one-third of specified torque, then to two-thirds of specified torque, then torque down completelyNOTE: Re-check torque cylinder head screws and spark plugs after motor has run, has reached operating temperature, and motor has cooled offStandard length lower unit338