1999 Volvo Penta "WT" Models Workshop Manual, Page 49Get this manual
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Drill Size Conversion Chart SHOWING MILLIMETER SIZES, FRACTIONAL AND DECIMAL INCH SIZES AND NUMBER DRILL SIZES
.0394 .0400 ,0410 0413
58 57 56 3.1 3_18 32 3,25 33 3.4 55 54 3,5 3,57