1998 Mercury 9.9/15HP 4-stroke outboards factory service manual, Page 184Get this manual
CYLINDER BLOCKCRANKCASE
Specifications
CYLINDER BLOCK STROKE Type Displacement Number of Cylinders Length Diameter Standard Oversize-0.010 in(0.25 mm) Oversize-0.020 in(0.50 mm) TaperOut of Round Maximum Bore Type Piston Type O.Dat Skirt Standard Oversize-0.010 in(0.25 mm) Oversize-0.020 in(0.50 mm) Piston to Cylinder Clearance Ring End Gap (Installed) Top Middle Bottom (Oil Ring) Side Clearance: Top Middle Compression Ratio Cylinder Compression (cold engine W.O.T Piston Pin Diameter Oil Clearance (Big End) Small End Inside Diameter Main Bearing Clearance Crankshaft Run-out Stroke Cycle Over Head Camshaft 19.7 cuin(323cc) 2.323 in(59 mm) 2.32282.3236 in(59.00-59.02 mm) 2.3327-2.3335 in(59.25-59.27 mm) 2.3425-2.3433 in(59.50-59.52 mm) 0.003 in(0.08 mm) Cast Iron Aluminum 2.32092.3214 in(58.95058.965 mm) 2.33072.3313 in(59.20059.215 mm) 2.34062.3411 in(59.45059.465 mm) 0.00140.0026 in(0.0350.065 mm)