1968 Evinrude Speedifour, Starflite 85HP Service Repair Manual P/N 4486, Page 8Get this manual
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CLEARANCE CHART POWER HEAD Piston and wrist 0006.0001 Minpinloose end Piston 1'ig gap .017.007 MinPiston ring groove .007.0045 Min clearance Cylinder and .004.0025 Minpiston Crankshaft bearings Upper