Yamaha F150B - Lower Unit (Regular Rotation Model)

1-19
SPEC
Specification
Lower unit (regular rotation model)
Part to be tightened Thread size
Tightening torques
N·m kgf·m ft·lb
Thermoswitch
1st
—
60.64.4
2nd 12 1.2 8.9
Exhaust cover plug
M14 23 2.3 17.0
M18 55 5.5 40.6
Exhaust cover bolt
1st
M6
6 0.6 4.4
2nd 12 1.2 8.9
Engine temperature sensor — 15 1.5 11.1
Cylinder block plug M14 23 2.3 17.0
Engine hanger bolt M6 12 1.2 8.9
Oil pressure sensor — 18 1.8 13.3
Oil filter — 18 1.8 13.3
Oil filter union bolt — 34 3.4 25.1
Crankcase plug — 54 5.4 39.8
Crankcase cover bolt
1st
M6
7 0.7 5.2
2nd 13 1.3 9.6
1st
M8
18 1.8 13.3
2nd 31 3.1 22.9
Oil pump screw — 4 0.4 3.0
Crankcase bolt
1st
M10
30 3.0 22.1
2nd 90°
1st
M8
14 1.4 10.3
2nd 26 2.6 19.2
Main bearing cap bolt
1st
M10
30 3.0 22.1
2nd 90°
Connecting rod cap
1st
—
23 2.3 17.0
2nd 43 4.3 31.7
3rd 90°
Part to be tightened Thread size
Tightening torques
N·m kgf·m ft·lb
Gear oil check screw — 9 0.9 6.6
Gear oil drain screw — 9 0.9 6.6
Lower case mounting bolt M10 47 4.7 34.7
Trim tab bolt M10 42 4.2 31.0
Propeller nut — 54 5.4 39.8
Cooling water inlet cover screw M5 5 0.5 3.7
Ring nut — 143 14.3 105.5
Pinion nut — 94 9.4 69.3