2001-2002 Yamaha 50HP F50Z/T50Z Ouboard 4-stroke engines service manual, Page 251Get this manual
ILOWRIRemove the needle bearing ' I
Lower unit
Checking the drive shaft
1Check the drive shaft for bends or wearReplace if necessary
862Y6775
Bearing housing needle bearing removerYB-06153 Needle bearing attachment90890-06611 Driver handleYB-06071 Driver rod L390890-06652
Checking the lower case
1Check the skeg and torpedo for cracks or damageReplace if necessary