Yamaha F150B, Service Manual

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How to use this manual
Manual format
The format of this manual has been designed to make service procedures clear and easy to under-
stand. Use the information below as a guide for effective and quality service.
• Parts are shown and detailed in an exploded diagram and are listed in the component list (see
a
in the figure below for an example page).
• The component list consists of part names and quantities, as well as bolt and screw dimensions
(see
b
in the figure below).
• Symbols are used to indicate important aspects of a procedure, such as the grade of lubricant and
lubrication point (see
c
in the figure below).
• Tightening torque specifications are provided in the exploded diagrams (see
d
in the figure below
for an example), and in the related detailed instructions. Some torque specifications are listed in
stages as torque figures or angles in degrees.
• Separate procedures and illustrations are used to explain the details of removal, checking, and
installation where necessary (see
e
in the figure below for an example page).
TIP:
For troubleshooting procedures, see Chapter 4, “Troubleshooting.”
8-1
LOWR
Lower unit
Lower unit (regular rotation model)
No. Part name Q’ty Remarks
1 Extension 1
2 Dowel 4
3 Hose nipple 2
4 O-ring 2
Not reusable
5 Cover 2
6 Seal 2
7 Water pipe 1
8 Grommet 1
9 Bolt 1 M10
×
45 mm
10 Bolt 12 M10
×
45 mm
11 Check screw 1
12 Gasket 2
Not reusable
13 Water pipe 1
14 Lower unit 1
15 Spacer 1
16 Propeller 1
17 Washer 1
21
15
14
17
18
19
20
16
2
2
11
12
10
10
9
8
2
7
13
5
6
6
5
10
10
2
23
12
47 N m (4.7 kgf m, 34.7 ft lb)
47 N m (4.7 kgf m, 34.7 ft lb)
42 N m (4.2 kgf m, 31.0 ft lb)
54 N m (5.4 kgf m, 39.8 ft lb)
9 N m (0.9 kgf m, 6.6 ft lb)
9 N m (0.9 kgf m, 6.6 ft lb)
22
47 N m (4.7 kgf m, 34.7 ft lb)
1
3
4
4
3
8-16
Drive shaft and lower case (regular rotation model)
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Removing the drive shaft
1. Remove the pinion nut.
2. Remove the drive shaft housing, shim(s)
(T3), thrust bearing, drive shaft, and
pinion.
3. Pull out the forward gear assembly.
Disassembling the drive shaft
housing
1. Remove the oil seals
a
.
2. Remove the needle bearing b .
Disassembling the forward gear
1. Remove the taper roller bearing
a
.
2. Remove the needle bearings from the
forward gear.
Disassembling the lower case
Use heat-resistant gloves, otherwise
burns could result.
Remove any flammable substances,
such as gasoline and oil, around the
working area to avoid the risk of fire.
Heat the lower case in a well-ventilated
area.
1. Remove the water inlet covers.
Drive shaft holder 6
a
: 90890-06520
Pinion nut holder
b
: 90890-06715
a
b
b
a
b
c d
c
d
Needle bearing attachment
c
:
90890-06610
Driver rod L3
d
: 90890-06652
Bearing separator
b
: 90890-06534
Needle bearing attachment
c
:
90890-06608
c
b
a
b
c
e
b
c d
a
Safety while working / How to use this manual