2001-2002 Yamaha 50HP F50Z/T50Z Ouboard 4-stroke engines service manual, Page 181Get this manual
Cylinder body 2Measure the crankshaft runoutReplace the crankshaft if out of specification
o S62Y5870
S62Y5920
Do not put the Plastigauge (PG-1) over the oil hole in the main journals of the crankshaft5Install the remaining half of the bearings into the crankcase
Crankshaft runout limit: 0.04 mm (0.0016 in)
Checking the crankshaft main journal oil clearance
1Clean the bearings, main journals, and bearing portions of the crankcase and cylinder bodyPlace the cylinder body upside down on benchInstall half of the bearings CD and the crankshaft into the cylinder body 3