1991 Johnson/Evinrude EI 60 thru 70 outboards Service Repair Manual P/N 507948, Page 14Get this manual
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Engine Specifications 60 thru 70 Operation
Stroke Standard
3.1870 to 3.1880 in(80,95-80,97 mm)
Crankshaft Dimensions:
1.4974-1.4979 in (38,03-38,05