Backlash; Measuring The Forward And Reverse Gear Backlash - SELVA MARINE Wahoo 15 Service Manual

LOWR
3. Turn the ball bearing 2 or 3 times, and
then measure the height from the ball
bearing (M4) as shown.
2
M4' M4
M4 = M4'–10 mm
NOTE:
• Select the shim thickness (T2) by using the
specified measurement(s) and the calcula-
tion formula.
• Measure the height from the ball bearing at
4 points to find the height average.
4. Calculate the reverse gear shim thick-
ness.
Calculate formula:
Reverse gear shim thickness (T2) =
57.85 – (M3 – M4)
5. Select the reverse gear shim(s) (T2) as
follows.
6-23
Lower unit
1
2
S6AG6500
1
10 mm
(0.39 in)
S6AG6510J
Calculated number
0.31–0.40
0.41–0.50
0.51–0.60
0.61–0.70
Available shim thicknesses:
0.1, 0.2, 0.3, 0.4, and 0.5 mm

Backlash

Measuring the forward and reverse
gear backlash
NOTE:
• Remove the water pump assembly before
measuring the backlash.
• Secure the drive shaft housing to the lower
case using 6 bolts (M8 × 25 mm).
1. Install the lower unit onto a repair stand.
2. Set the shift rod to the neutral position at
the lower unit.
F
N
R
3. Turn the lower unit so that the propeller
shaft is facing down.
4. Install the special service tools.
5. Tighten the center bolt 3 to the specified
torque while turning the drive shaft.
Shim thickness
(mm)
0.30
0.40
0.50
0.60
6
6
F
N
R
S6AG6371
6AG3J11