Yamaha F75F - Checking the Drive Shaft; Checking the Forward Gear; Checking the Pinion; Disassembling the Lower Case

Drive shaft and lower case
8-12
Disassembling the lower case
• Use heat-resistant gloves. Otherwise,
burns could result.
• To prevent fires, remove any flammable
substances, such as gasoline and oil,
around the working area.
• Keep good ventilation while working.
1. Remove:
• Tapere
d roller bearing outer race
• Forward gear shim
a. Heat the area of the lower case where
the tapered roller bearing outer race is
to be
removed using a gas torch, and
then remove the tapered roller bearing
outer race “1” and forward gear shims
“2”.
When heating the lower case, heat the en-
tire installation area evenly. Otherwise, the
paint on the lower case could be burned.
2. Remove:
• Needle
bearing “1”
Checking the pinion
1. Check:
• Teeth of the pinion
Cracked/worn  Re
place.
Checking the forward gear
1. Check:
• Teeth and dogs
of the forward gear
Cracked/worn  Re
place.
Checking the drive shaft
1. Check:
• Drive shaft
Damaged/worn  Replace.
2. Measure:
• Drive shaft runout
Above specification  Replace.
1
2
Needle bearing attachment “2”
90890-06609
Driver rod L3 “3”
90890-06652
Drive shaft
Runout
1.0 mm (0.039 in)
1
2
2
3
3