Yanmar 6BY - Flywheel and Flywheel Housing; Flywheel Housing Remove & Install; Drive Coupling Remove & Install

ENGINE
5-42
BY Service Manual
Flywheel and Flywheel Housing
FLYWHEEL AND FLYWHEEL HOUSING
Remove and Install Flywheel Housing
1. Disconnect the negative (-) battery cable from
the battery.
2. Remove the marine gear or stern drive (as
equipped).
Stern Drive Engines
Marine Gear Engines
Figure 5-63
3. Remove two bolts (Figure 5-63, (1)) and
remove starter motor (Figure 5-63, (2)). See
Remove and Install Starter Motor on page 10-7.
4. Remove bolts securing oil sump to flywheel
housing.
5. Remove 11 bolts (Figure 5-63, (3)). Remove
housing (Figure 5-63, (4)). Use care not to lose
the two alignment sleeves (Figure 5-63, (5))
and dowel (Figure 5-63, (6)).
6. Clean mating surfaces. Install alignment
sleeves and dowel in flywheel housing.
7. Install flywheel housing.
8. Install washers on the M10 x 130, M8 x 130,
and M8 x 40 bolts.
9. Install 11 bolts and washers. Tighten in two
stages to specifications.
Flywheel Housing Torque
10. Install starter. See Remove and Install Starter
Motor on page 10-7.
11. Connect battery negative (-) cable.
Remove and Install Drive Coupling
Removal
1. Remove flywheel housing. See Remove and
Install Flywheel Housing on page 5-42.
2. Install flywheel holding tool to prevent flywheel
rotation.
0003573
(
1
)
(
3
)
(
4
)
(
5
)
(
2
)
(
5
)
(
6
)
0003574
(
1
)
(
3
)
(
4
)
(
5
)
(
5
)
(
6
)
(
2
)
Item Initial Torque Final Torque
M12 Bolt
15 N·m
(133 in.-lb)
80 N·m
(59 ft-lb)
M10 Bolt
46 N·m
(34 ft-lb)
M8 Bolt
23 N·m
(204 in.-lb)