Echo CS-420ES User Manual
Page 4
SERVICE INFORMATION
CS-420ES
4
1-3 Torque limits
Descriptions
Size
kgf•cm
N•m
in•lbf
Starter Starter pawl
M 5
40 - 60
4 - 6
35 - 50
system
Starter case
M 5**
25 - 35
2.5 - 3.5
22 - 30
Ignition Magneto rotor (Flywheel)
M 8
250 - 290
25 - 29
220 - 250
system
Ignition coil
M 5
40 - 60
4 - 6
35 - 50
Ignition switch
M 14
15 - 30
1.5 - 3
13 - 26
Spark plug
M 14
150 - 170
15 - 17
130 - 150
Fuel
Carburetor
M 5
30 - 45
3 - 4.5
26 - 40
system
carburetor elbow
M 5**
20 - 30
2 - 3
17 - 26
Intake bellows
M 5
30 - 45
3.0 - 4.5
26 - 40
Clutch Clutch hub
LM 10
300 - 400
30 - 40
260 - 350
Engine Crankcase
M 5*
70 - 110
7 - 11
60 - 95
Engine mount
M 5
70 - 110
7 - 11
60 - 95
Muffl er
M 5
80 - 110
8 - 11
70 - 95
Cylinder cover
M 5
25 - 45
2.5 - 4.5
22 - 40
Others Auto-oiler
M 4
20 - 35
2.5 - 3.5
17 - 30
Front handle
M 5**
45 - 65
4.5 - 6.5
40 - 55
Rear handle assembly
M 5
30 - 50
3 - 5
26 - 45
M 4
35 - 50
3.5 - 5
30 - 45
Handle lid
M 4
10 - 20
1 - 2
9 - 17
Brake lever (Hand guard)
M 5**
10 - 20
1 - 2
9 - 17
M 4**
45 - 65
4.5 - 6.5
40 - 55
Sprocket guard plate
M 4**
10 - 20
1 - 2
9 - 17
Chain catcher
M 5
45 - 60
4.5 - 6
40 - 52
Guide bar
M 8
200 - 230
20 - 23
175 - 200
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
1-4 Special repairing materials
Material
Location
Remarks
Adhesive
Ball bearing outer / crankcase
Pulse pipe joint
Loctite #675 or equivalent
Cushions
Loctite #424, ThreeBond #1741 or equivalent
Liquid gasket
Crankcase seams
Loctite #515 or equivalent
Grease Auto-oiler
worm
Clutch needle bearing
Handle cushions
Lithium based grease
Rewind spring
Starter center shaft
Chain brake (metal contact part)
Molybdenum grease (approx. 1 gram)
LM: Left-hand thread *Apply thread locking sealant (See below) ** Tapping screw