1996 Johnson Evinrude "ED" 9.9 thru 30 2-Cylinder Service Repair Manual, P/N 507122, Page 14Get this manual
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Engine Specifications 9.915 Operation
2.3745-2.3750 in(60,31-60,33 mm)
Crankshaft Dimensions: Top Journal Center Journal Bottom Journal Rod Crankpin Piston Ring End Gap, Both