Yamaha F50D Servise Manual - page 36

Specification

1-15

SPEC

Lower unit (F50D)

Lower unit (FT50C)

Bracket unit

Crankcase bolt

1st

M8

15

1.5

11.1

2nd

30

3

22.1

Crankcase bolt

1st

M6

6

0.6

4.4

2nd

12

1.2

8.9

Connecting rod bolt

1st

—

6

0.6

4.4

2nd

17

1.7

12.5

Part to be tightened

Thread size

Tightening torques

N·m

kgf·m

ft·lb

Part to be tightened

Thread size

Tightening torques

N·m

kgf·m

ft·lb

Gear oil drain screw

—

9

0.9

6.6

Gear oil check screw

—

9

0.9

6.6

Lower unit mounting bolt

M10

40

4

29.5

Propeller nut

—

35

3.5

25.8

Propeller shaft housing bolt

M8

15

1.5

11.1

Pinion nut

—

74

7.4

54.6

Part to be tightened

Thread size

Tightening torques

N·m

kgf·m

ft·lb

Gear oil drain screw

—

9

0.9

6.6

Gear oil check screw

—

9

0.9

6.6

Lower unit mounting bolt (nut)

M10

40

4

29.5

Propeller nut

—

35

3.5

25.8

Ring nut

—

103

10.3

76.0

Pinion nut

—

94

9.4

69.3

Part to be tightened

Thread size

Tightening torques

N·m

kgf·m

ft·lb

Tiller handle nut

—

38

3.8

28.0

Steering friction piece nut

—

13

1.3

9.6

Shift cable locknut

—

11

1.1

8.1

Detent bolt

—

24

2.4

17.7

Upper mounting nut

—

24

2.4

17.7

Lower mounting nut

—

42

4.2

31.0

Muffler assembly bolt

M8

21

2.1

15.5

Manifold bolt

M6

11

1.1

8.1

Grease nipple

—

3

0.3

2.2

Self-locking nut

—

23

2.3

17.0

Steering hook nut

—

20

2

14.8

Trim sensor cam screw

M6

2

0.2

1.5