1998 Mercury 9.9/15HP 4-stroke outboards factory service manual, Page 184Get this manual
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CYLINDER BLOCKCRANKCASE
0.0060.012 in(0.150.30 mm) 0.0120.020 in(0.300.50 mm) 0.0080.028 in(0.200.70 mm) 0.00160.0032 in(0.040.08 mm) 0.00120.0028 in(0.030.07 mm) 9.3:1 185190 psi (Peak)