Yamaha F150A - Lower Unit (Regular Rotation Model); Lower Unit (Counter Rotation Model); Bracket Unit

1-19
Specified tightening torque
Lower unit (regular rotation model)
Lower unit (counter rotation model)
Bracket unit
Connecting rod bolt
1st
M9
13 1.3 9.6
2nd 23 2.3 17.0
3rd 90°
Main bearing cap bolt
1st
M10
30 3.0 22.1
2nd 90°
Crankcase bolt
1st
M8
14 1.4 10.3
2nd 28 2.8 20.7
1st
M10
30 3.0 22.1
2nd 90°
Part to be tightened Screw size
Tightening torques
N·m kgf·m ft·lb
Drain screw — 9 0.9 6.6
Check screw — 9 0.9 6.6
Propeller nut — 55 5.5 40.6
Trim tab bolt M10 43 4.3 31.7
Lower case mounting bolt M10 48 4.8 35.4
Ring nut — 145 14.5 106.9
Pinion nut — 95 9.5 70.1
Water inlet cover screw M5 1 0.1 0.7
Part to be tightened Screw size
Tightening torques
N·m kgf·m ft·lb
Drain screw — 9 0.9 6.6
Check screw — 9 0.9 6.6
Propeller nut — 55 5.5 40.6
Trim tab bolt M10 43 4.3 31.7
Lower case mounting bolt M10 48 4.8 35.4
Ring nut — 145 14.5 106.9
Pinion nut — 95 9.5 70.1
Water inlet cover screw M5 1 0.1 0.7
Part to be tightened Screw size
Tightening torques
N·m kgf·m ft·lb
Shift position switch screw M4 2.5 0.25 1.84
Shift cut-off switch screw M4 2.5 0.25 1.84
Shift bracket bolt — 19 1.9 14.0
Shift rod detent bolt — 18 1.8 13.3
Grease nipple — 1 0.1 0.7
Hose joint adapter screw ø6 5 0.5 3.7
Upper mounting nut — 72 7.2 53.1
Lower mounting nut — 72 7.2 53.1
Upper mount bolt M10 55 5.5 40.6
Baffle plate screw M6 4 0.4 3.0
Part to be tightened Screw size
Tightening torques
N·m kgf·m ft·lb