2009 Yamaha F40 Outboard Service Manual, Page 273Get this manual
Lower unit 3Check the gap between the pinion and the special service tool aNOTICE: When tightening the pinion nut c, check that the drive shaft rotates smoothlyAlso, make sure that there is gap between the pinion and the special service tool aIf there is no gap and the drive shaft does not rotate, the special service tool could be damaged
Selecting the pinion shim (T3)
Spray anti-rust lubricant on the bearing before installationDo not apply gear oil to the partsOtherwise, correct measurements cannot be obtained Keep the parts free from foreign materials, such as dirt or lintDo not damage the measurement plane surface of the pinion height gaugeOtherwise, accurate measurements cannot be obtained1Install the taper roller bearing and the drive shaft between and of the special service tool a, and then tighten the pinion height gauge bolts temporarily