Measuring The Reverse Gear Backlash - Yamaha FT25B Manual De Servicio

LOWR
BACKLASH
6620
6650
6660
MEASURING THE REVERSE GEAR
BACKLASH
1. Measure:
• Reverse gear backlash
Out of specification → Adjust.
Reverse gear backlash
0.91 - 1.37 mm (0.036 - 0.054 in)
Measuring steps
(1) Set the shift rod into the neutral posi-
tion.
(2) Load the reverse gear by installing the
propeller, washer (turned around),
spacer and washer, and then tighten
the propeller nut.
Propeller nut
5 Nm (0.5 m • kgf, 3.6 ft • lb)
(3) Install the backlash indicator onto the
drive shaft (on the 16 mm (0.63 in)
diameter portion of the drive shaft a).
Backlash indicator .................... 1
YB-06265 / 90890-06706
(4) Install the dial gauge onto the lower
unit and have the dial gauge plunger
contact the mark on the backlash indi-
cator.
Magnetic-base plate................. 2
YB-07003 / 90890-07003
Dial gauge set ........................... 3
YU-03097 / 90890-01252
Magnetic base........................... 4
YU-34481 / 90890-06705
(5) Slowly turn the drive shaft clockwise
and counterclockwise. When the drive
shaft stops in each direction, measure
the backlash.
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E