2001 Edition Yamaha F225A and LF225A Outboards Service Manual, Page 151Get this manual
Cylinder block 9Tighten the crankcase bolts to the specified torques in two stages and in the sequence shown10Remove the crankcase and measure the width of the compressed Plastigauge (PG-1) on each main journalReplace the main bearing if out of specification
Crankshaft main journal oil clearance: 0.0250.050 mm (0.00100.0020 in)
NOTE: Crankcase bolts 1F can be reused five times Do not move the crankshaft until the main journal oil clearance measurement has been completed Tighten crankcase bolts 1F to the specified torques in two stages first, and then tighten crankcase bolts GS to the specified torques in two stages Make mark on the crankcase and crankcase bolts, and then tighten crankcase bolts 1F 90 from the mark18 Crankcase bolt (M8): 1st: 25 Nm (2.5 kgfm, 18 ftlb) 2nd: 90 9F Crankcase bolt (M10): 1st: 40 Nm (4.0 kgfm, 29 ftlb) 2nd: 90 Crankcase bolt (M8): 1st: 14 Nm (1.4 kgfm, 10 ftlb) 2nd: 28 Nm (2.8 kgfm, 20 ftlb)