TOHATSU BFT75A - Engine & Frame Torque Values

2-4
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SERVICE INFORMATION
FRAME
Unit: mm (in)
ENGINE & FRAME TORQUE VALUES
Use standard torque values for fasteners that are not listed in this table.
ENGINE
Part Item Standard Service limit
Propeller shaft Shaft O.D. At forward bevel gear
bearing
24.987 – 25.000 (0.9837 – 0.9843) 24.966 (0.9829)
At needle
bearing
30.007 – 30.020 (1.1814 – 1.1819) 29.986 (1.1805)
Runout 0.02 (0.001) or below –
Vertical shaft Shaft O.D. (at needle bearing) 28.566 – 28.575 (1.1246 – 1.1250) 28.545 (1.1238)
Runout 0.30 (0.012) or below –
Propeller/gear case Forward bevel gear backlash 0.10 – 0.28 (0.004 – 0.011) –
Power trim/tilt
assembly
(Except LHGX type)
Lower chamber hydraulic pressure 8,826 – 11,768 kPa
(90 – 120 kgf/cm
2
, 1,280 – 1,707 psi)
Upper chamber hydraulic pressure 3,923 – 7,355 kPa (40 – 75 kgf/cm
2
, 569 – 1,067 psi)
Power tilt motor
assembly
(Except LHGX type)
Brush length 9.8 (0.39) 4.8 (0.19)
Mica depth – 0.5 (0.02)
Trim angle sensor
(Except LHGX type)
Resistance Between
Light green – Black
4.0 – 6.0 kΩ
–
Between
Yellow/Blue – Black
2.7 – 4.3 kΩ
Item
Thread Dia. and pitch Torque values
Remarks
mm (in) N·m kgf·m lbf·ft
Crankcase bolt M10 x 1.25 – – – See page 15-13
Cylinder block sealing bolt M24 x 1.5 54 5.5 40
Cylinder head bolt M9 x 1.25 – – – See page 14-20
Cylinder head sealing bolt M14 x 1.5 29 3.0 21
Cylinder head sealing bolt M20 x 1.5 49 5.0 36
Cylinder head sealing screw PT 1/8 17 1.7 13
Spark plug M14 x 1.25 18 1.8 13
Connecting rod bolt M6 x 0.75 – – – See page 15-13
Tensioner pivot bolt M8 x 1.25 22 2.2 16
Cam chain driven sprocket bolt M10 x 1.5 61 6.2 45 Apply engine oil to the
threads and seating
surface.
Intake side valve adjusting lock nut
(BF90D/BF100A)
M7 x 0.75 20 2.0 15 Apply engine oil to the
threads and seating
surface.
Exhaust side valve adjusting lock
nut (BF90D/BF100A)
M7 x 0.75 14 1.4 10 Apply engine oil to the
threads and seating
surface.
Valve adjusting lock nut (BF75D/
BF80A)
M7 x 0.75 14 1.4 10 Apply engine oil to the
threads and seating
surface.
Oil filter cartridge M20 x 1.5 12 1.2 9
Oil filter holder M22 x 1.5 49 5.0 36 Apply engine oil to the
threads and seating
surface.
Oil drain plug bolt M12 x 1.5 23 2.3 17
Rocker shaft bolt M8 x 1.25 29 3.0 21 Apply engine oil to the
threads and seating
surface.
Cam pulse plate bolt M14 x 1.5 34 3.5 25
Throttle body mounting bolt M8 x 1.25 22 2.2 16
IAC valve mounting bolt M8 x 1.25 22 2.2 16
Engine mounting bolt/nut
(Mount case side)
M8 x 1.25 27 2.8 20