2007-2009 Yamaha F15/F20 Outboard Service Manual, Page 90Get this manual
Cylinder block 5-49 Disassembling the cylinder block 5-51 Checking the piston diameter 5-51 Checking the cylinder bore 5-52 Checking the piston clearance 5-52 Checking the piston ring 5-52 Checking the piston ring end gap 5-53 Checking the piston ring groove 5-53 Checking the piston ring side clearance 5-53 Checking the piston pin boss bore 5-54 Checking the piston pin diameter 5-54 Checking the connecting rod small and big end inside diameter 5-54 Checking the connecting rod big end side clearance 5-54 Checking the crankshaft 5-55 Checking the crankpin oil clearance 5-55 Checking the crankshaft journal oil clearance .5-56 Selecting the crankshaft main bearing 5-57 Assembling the cylinder block .5-58 Installing the power unit.5-61