TM 9--2815--247--34 0063 00--5 ENGINE BLOCK REPAIR -- CONTINUED 0063 00 Inspection -- Continued 3.   Measure inside diameter of starter idler gear shaft bore (12). Replace block if not within the following limits. 4.   Measure inside diameter of generator idler gear shaft bore (13). Replace block if not within the following limits. REF NO. POINT OF MEASUREMENT SIZES AND FITS OF NEW PARTS inches (mm) WEAR LIMITS 12 Inside diameter of starter idler gear shaft bore in block 1.1808 (29.99232) 1.1818 (30.01772) 1.1824 (30.03296) 13 Inside diameter of generator idler gear shaft bore in block 1.1808 (29.99232) 1.1818 (30.01772) 1.1824 (30.03296) Figure 2 12 13