Lower Unit; Bracket Unit - Yamaha F25 Service Manual

Lower unit

Part to be tightened
Check screw
Drain screw
Lower case mounting bolt
Propeller nut
Propeller shaft housing bolt
Pinion nut
Water inlet cover screw
Lower case mounting bolt (high thrust model)
Propeller shaft housing bolt (high thrust model)

Bracket unit

Part to be tightened
Self-locking nut
Throttle grip screw
Engine shut-off switch nut
Friction plate bolt
Self-locking nut
Alert indicator screw
Flushing hose adapter screw
Self-locking nut
Upper mount bolt
Lower mounting nut
Grease nipple
Lower mount housing bolt
(S-transom model)
Lower mount housing bolt (L-transom model)
Baffle plate screw
Upper case bolt
Baffle plate screw (high thrust model)
Upper case plug (high thrust model)
Engine oil drain bolt
Exhaust manifold bolt
Exhaust manifold bolt (high thrust model)
Stud bolt
Friction piece bolt
Tilt stopper plate nut
Tilt lever screw
Self-locking nut
Stopper nut (PTT model)
Trim sensor cam screw (high thrust model)
Screw size
—
—
M10
—
M6
—
M5
M10
M8
Screw size
—
M5
—
M5
—
M6
ø6
—
M8
—
—
1st
M8
2nd
—
M5
1st
M8
2nd
M5
—
—
M6
M6
—
M6
—
M5
—
—
M6
Special tightening torque
Tightening torques
N·m kgf·m
9 0.9
9 0.9
37 3.7
34 3.4
11 1.1
50 5.0
1 0.1
39 3.9
16 1.6
Tightening torques
N·m kgf·m
37 3.7
3.5 0.35
2.5 0.25
4 0.4
4 0.4
4 0.4
5 0.5
24 2.4
26 2.6
54 5.4
3 0.3
14 1.4
24 2.4
54 5.4
2 0.2
21 2.1
21 2.1
3 0.3
17 1.7
27 2.7
10 1.0
11 1.1
20 2.0
3.9 0.39
24 2.4
4 0.4
45 4.5
36 3.6
2 0.2
ft·lb
6.6
6.6
27.3
25.1
1
8.1
36.9
0.7
28.8
11.8
ft·lb
27.3
2.58
1.84
3.0
3.0
3.0
3.7
17.7
19.2
39.8
2.2
10.3
17.7
39.8
1.5
15.5
15.5
2.2
12.5
19.9
7.4
8.1
14.8
2.88
17.7
3.0
33.2
26.6
1.5
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