1988 Johnson/Evinrude "CC" 40 thru 55 Models Service Repair Manual P/N 507661, Page 73Get this manual
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Drill Size Conversion Chart SHOWING MILLIMETER SIZES, FRACTIONAL AND DECIMAL INCH SIZES AND NUMBER DRILL SIZES
.0689 .0700 .0709 .0728 .0730 .0748 .0760 .0767 .0781
50 49 48 564