1997 Johnson Evinrude "EU" 40 thru 55 2-Cylinder Service Repair Manual, P/N 507265, Page 153Get this manual
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INote If any cylinder is outside these tolerances, it must be bored oversizeA 0.030 in(0,762 mm) oversize piston is available for this engineTo determine oversize bore, add 0.030 in(0,762 mm) to the s