Selecting The Reverse Gear Shims; Backlash; Measuring The Forward Gear Backlash - Yamaha FT50C Service Manual

LOWR
Example:
If "M" is "24.00 mm" and "F" is "+5", then
T1 = 24.50 + (+5)/100 – 24.00 mm
= 0.50 + 0.05 mm = 0.55 mm
If "M" is "24.00 mm" and "F" is "–5", then
T1 = 24.50 + (–5)/100 – 24.00 mm
= 0.50 – 0.05 mm = 0.45 mm
3. Select the forward gear shim(s) (T1) as
follows.
Calculated numeral
at 1/100 place
1, 2
3, 4, 5
6, 7, 8
9, 10
Available shim thicknesses:
0.10, 0.12, 0.15, 0.18, 0.30, 0.40, and
0.50 mm
Example:
If "T1" is "0.45 mm", then the forward gear
shim is 0.42 mm.
If "T1" is "0.50 mm", then the forward gear
shim is 0.48 mm.

Selecting the reverse gear shims

There is no need to select the reverse gear
shims.

Backlash

Measuring the forward gear backlash

1. Remove the water pump assembly.
2. Set the gearshift to the neutral position.
6-27
Lower unit
Rounded numeral
0
2
5
8
Shift rod push arm: 90890-06052
3. Install the special service tool so that it
pushes against the propeller shaft.
NOTE:
Tighten the universal puller or center bolt
while turning the drive shaft until the drive
shaft can no longer be turned.
Bearing housing puller claw L 1:
90890-06502
Stopper guide plate 2: 90890-06501
Center bolt 3: 90890-06504
4. Install the backlash indicator onto the
drive shaft (18 mm [0.71 in] in diameter),
then the dial gauge onto the lower unit.
6
62Y5A11