1999 Volvo Penta "WT" Models Workshop Manual, Page 57Get this manual
4Carefully work the gauge up and down the cylinder to determine taper and turn it to different points around the cylinder wall to determine the out-of-round conditionMeasure the bore both parallel to and at right angles to the engine centerlineMeasure at the top, middle, and bottom of the bore and note the readings5Recondition the cylinder bore as necessaryRefer to Cylinder Bore Reconditioning in this sectionCylinder Bore Reconditioning Measure:
DRC650l1