Backlash; Measuring The Forward And Reverse Gear Backlash - Yamaha F15B Service Manual

Backlash

Measuring the forward and reverse
gear backlash
1. Remove the water pump assembly.
2. Set the gearshift to the neutral position.
3. Install the special service tool so that it
pushes against the propeller shaft.
1
NOTE:
Tighten the center bolt while turning the drive
shaft until the drive shaft can no longer be
turned.
Bearing housing puller claw S 1:
90890-06564
Stopper guide plate 2:
90890-06501
Center bolt 3:
90890-06504
4. Turn the lower unit upside down.
6D45F11
6B460430
3
2
6B460580
5. Install the backlash indicator onto the
drive shaft (13 mm [0.51 in] in diameter),
then the dial gauge onto the lower unit.
4
a
6
b
NOTE:
Install the dial gauge so that the plunger a
contacts the mark b on the backlash indica-
tor.
Backlash indicator 4:
90890-06706
Magnet base plate 5:
90890-07003
Dial gauge set 6:
90890-01252
Magnet base B 7:
90890-06844
6. Slowly turn the drive shaft clockwise and
counterclockwise and measure the back-
lash when the drive shaft stops in each
direction.
Forward gear backlash:
0.19–0.86 mm (0.0075–0.0339 in)
Shimming/Backlash
5
7
6B760590
6-26
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