1993 Johnson Evinrude "ET" 40 thru 55 Service Repair Manual, P/N 508283, Page 14Get this manual
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Engine Specifications
Powerhead Type Displacement Bore Stroke Standard Bore In-line 2-Cylinder 45 cuin(737 cm3.1875 in (80,96 mm) 2.820 in(71,63 mm)
3.1870-3.1880 in(80,95-80,98 mm)