2005 Yamaha F90TR 90HP Outboards Factory Service Manual, Page 66Get this manual
Cylinder block 5-39 Disassembling the cylinder block 5-40 Checking the piston diameter 5-40 Checking the cylinder bore 5-41 Checking the piston clearance 5-41 Checking the piston rings 5-41 Checking the piston ring grooves 5-42 Checking the piston ring side clearance 5-42 Checking the connecting rod big end side clearance 5-43 Checking the crankshaft 5-43 Checking the crankpin oil clearance 5-43 Selecting the connecting rod bearing 5-45 Checking the crankshaft journal oil clearance .5-46 Selecting the main bearing 5-47 Assembling the power unit 5-49 Installing the power unit.5-51