4
SERVICE INFORMATION
HC-331ES
HC-341ES
1-3 Torque limits
Descriptions
Size kgf • cm
N•m
in•lbf
Starter Pawl assembly and nut
M 8
160 - 200
16 - 20
140 - 175
system
Starter case
M 4*
25 - 35
2.5 - 3.5
22 - 30
Ignition Ignition coil
M 4
35 - 50
3.5 - 5
30 - 45
system
Spark plug
M 14
130 - 170
13 - 17
115 - 150
Fuel
Carburettor
M 5
30 - 45
3 - 4.5
26 - 40
system
Intake insulator
M 5*
50 - 70
5 - 7
45 - 60
Fuel tank
M 5*
50 - 70
5 - 7
45 - 60
Clutch Clutch hub
M 8
160 - 200
16 - 20
140 - 175
Clutch case
M 4*
30 - 45
3 - 4.5
26 - 40
Engine Crankcase
M 5**
70 - 110
7 - 11
60 - 95
Cylinder
M 5**
70 - 110
7 - 11
60 - 95
Muf
fl
er
M 5
60 - 100
6 - 10
50 - 90
Engine mount on gear case
M 6
80 - 120
8 - 12
70 - 105
Gear case
Gear case cover
M 4
30 - 45
3 - 4.5
26 - 40
Cutter Cutter bolts
M 6
5 - 15
0.5 - 1.5
5 - 13
Cutter nuts
M 6
50 - 70
5 - 7
45 - 60
Cutter support
M 5
50 - 70
5 - 7
45 - 60
Handle Rear handle set
M 5
50 - 70
5 - 7
45 - 60
Regular bolt, nut and screw
M 3
6 - 10
0.6 - 1
5 - 9
M 4
15 - 25
1.5 - 2.5
13 - 22
M 5
25 - 45
2.5 - 4.5
22 - 40
M 6
45 - 75
4.5 - 7.5
40 - 65
M 8
110 - 150
11 - 15
95 - 130
Torx bolt
M 4
35 - 45
3.5 - 4.5
30 - 40
M 5
50 - 70
5 - 7
45 - 60
* Apply thread locking sealant (See below).
** The torque differences among bolts should not exceed 20 kgf• cm (2N•m, 17in•lbf) on one cylinder or crank-
case.
1-4 Special repairing materials
Material Location
Remarks
Grease Gear
case
Rewind spring
Lithium based grease
Starter center post
Oil seal inner lips
Thread locking
Fuel tank
Loctite #222, ThreeBond 1342 or equivalent
sealant Intake
insulator
Clutch
case
Loctite #242, ThreeBond 1324 or equivalent
Starter
case
