1999 Volvo Penta "WT" Models Workshop Manual, Page 105Get this manual
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Example "A": Cylinder Bore Measurement Base Cylinder Bore Diameter Difference 4.002 in(10,165 cm) (Worn Bore) 4.000 in{10,160 cm) 0.002 in(0,051 mm)
The number in the box above 0.032 in(0,813 mm