Yamaha F150A - Power Unit

1-18
Specified tightening torque
0
1
2
3
4
5
6
7
8
9
10
A
Power unit
Part to be tightened Screw size
Tightening torques
N·m kgf·m ft·lb
Spark plug — 25 2.5 18.4
Power unit mounting bolt
M8 20 2.0 14.8
M10 42 4.2 31.0
Apron screw M6 4 0.4 3.0
PTT motor lead bolt M6 4 0.4 3.0
Flywheel magnet nut — 270 27.0 199.1
Drive sprocket bolt M5 7 0.7 5.2
Timing belt tensioner bolt — 39 3.9 28.8
Starter motor mounting bolt M8 30 3.0 22.1
Starter motor lead bolt M6 4 0.4 3.0
Terminal nut — 9 0.9 6.6
Ignition coil bolt M6 7 0.7 5.2
PTT relay nut — 4 0.4 3.0
Starter relay lead bolt M6 4 0.4 3.0
Camshaft cap bolt
1st
M7
90.96.6
2nd 17 1.7 12.5
Driven sprocket bolt M10 60 6.0 44.3
Cylinder head cover plate screw M4 2 0.2 1.5
Cylinder head bolt
1st
M8
14 1.4 10.3
2nd 28 2.8 20.7
1st
M10
28 2.8 20.7
2nd 56 5.6 41.3
3rd 90°
Exhaust cover bolt
1st
M6
60.64.4
2nd 12 1.2 8.9
Thermostat cover bolt
1st
M6
60.64.4
2nd 12 1.2 8.9
Exhaust cover plug
M14 23 2.3 17.0
M18 56 5.6 41.3
Oil pump cover screw M6 4 0.4 3.0
Balancer assembly bolt
1st
M6
70.75.2
2nd 13 1.3 9.6
1st
M8
18 1.8 13.3
2nd 31 3.1 22.9
Crankcase cover bolt
1st
M6
70.75.2
2nd 13 1.3 9.6
1st
M8
18 1.8 13.3
2nd 31 3.1 22.9
Oil filter — 18 1.8 13.3
Oil pressure sensor — 18 1.8 13.3
Engine hanger bolt M6 12 1.2 8.9
Engine temperature sensor — 15 1.5 11.1
Cylinder block plug M14 23 2.3 17.0
Union bolt — 34 3.4 25.1
Relief valve — 32 3.2 23.6