1998 Johnson Evinrude "EC" 40 thru 55 2-Cylinder Service Repair Manual, P/N 520206, Page 57Get 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 55 54
3.57 3.6 3.7