2007-2009 Yamaha F15/F20 Outboard Service Manual, Page 145Get this manual
Power unit
Checking the crankshaft
1Measure the crankshaft journal diameter a, crankpin diameter b, and crankpin width cReplace the crankshaft if out of specification
Crankshaft runout limit: 0.05 mm (0.0020 in)
Checking the crankpin oil clearance
1Clean the connecting rod
2Put piece of Plastigauge (PG-1) onto the crankpin, parallel to the crankshaft
S6AG5910
NOTE: Be sure not to put the Plastigauge (PG-1) over the oil hole in the crankpin of the crankshaft