1990 Johnson Evinrude "ES" 40 thru 55 Service Repair Manual, P/N 507872, Page 14Get this manual

1990 Johnson Evinrude "ES" 40 thru 55 Service Repair Manual, P/N 507872, Page 14

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Engine Specifications
Piston Diameter, Standard

45 cu in (737 cm3.1875 in(80,96 mm) 2.820 in (71,63 mm) 3.1870-3 .1880 in(80,95-80,98 mm)

1.4974-1.4979 in (38,03-38,04