2005 Yamaha F90TR 90HP Outboards Factory Service Manual, Page 162Get this manual
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Upper case
1 Remove the screws and disassemble the oil pumpBearing installer 1: YB-41446 Driver handle (large) 2: YB-06071 Depth a: 0.5 0.3 mm (0.02 0.01 in) 2 Install new oil seal into the oil