Cont’d
Item Description Item Description
Intake 26.736~26.836mm
Valve opening
temperature
58~62ºC
H
eight
Exhaust
26.532~26.623mm
Full-open
temperature
70ºC
Round diameter
21.950~22.050mm
Thermostat
Valve lift
3mm
Journal diameter
14.966~14.984mm
Discharge
8L/h
Camshaft
Camshaft round limit
0.03mm
Pressure
50kPa
Valve lifter outside diameter
7.978~7.987mm
Fuel
pump
Plunger stroke
1.8~2.2mm
Ignition system
Item Description Item Description
Ignition timing
BTDC28º ~32º
Spark plug gap
0.6~0.7mm
T.C.I system output
peak voltage
130V
Primary coil
0.7~0.96
Ω
T.C.I air gap
0.4~0.6mm
Ignitor
ass’y
resistance
Secondary coil
5.8~7.0K
Ω
TIGHTENING TORQUE
Specified torque
Part to be tightened
Part name
Thread size
Quantity
Torque
Oil drain
Bolt
M8
1
20Nm
Spark plug
—
M14 1
25
Nm
Recoil starter
Bolt
M6
3
8 Nm
Flywheel rotor ass’y
Nut
M10
1
44 Nm
Carburetor Bolt
M6
2
8
Nm
Intake manifold
Bolt
M6
2
8 Nm
Cylinder head cover
Bolt
M6
4
11 Nm
1st
tightening 15
Nm
2nd
tightening
Bolt
M8 4
30 Nm
1st tightening
6 Nm
Cylinder
head
2nd
tightening
Bolt
M6 1
11 Nm
Rocker arm screw bolt
Bolt
M6 2
10
Nm
Locknut (rocker arm)
Nut
M6x0.75 2 10
Nm
Oil seal housing
Bolt
M8 1
18
Nm
Power unit mounting
Bolt
M6 7
8
Nm
Thermostat cover
Bolt
M6 3
8
Nm
Breather cover
Bolt
M6 3
8
Nm
1st tightening
10 Nm
Power
unit
Crankcase
2nd tightening
Bolt M8 7
22 Nm
11
https://www.boat-manuals.com/