Yamaha Outboard Motors Factory Service Manual F6 and F8, Page 264Get this manual
OIL PUMP CHECKING THE OIL PUMP
Measure: Oil pump clearances a, b, and Out of specification ReplaceOil pump clearances: a: 0.100.15 mm (0.0040.006 in) b: 0.040.14 mm (0.0020.006 in) c: 0.030.09 mm (0.0010.004 in)