1993 Johnson Evinrude "ET" 60 thru 70 Service Repair Manual, P/N 508284, Page 52Get this manual
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Drill Size Conversion Chart SHOWING MILLIMETER SIZES, FRACTIONAL AND DECIMAL INCH SIZES AND NUMBER DRILL SIZES
3.1 3.18 3.2 3.25 3.3 3.4 3.5
.0689 .0700 .0709 .0728 .0730 .07