Service information cs-420es – Echo CS-420ES User Manual
Page 5
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SERVICE INFORMATION
CS-420ES
5
Description
mm (in)
A Cylinder bore
When plating is worn and aluminum can be seen
B Piston outer diameter
Min.
39. 89 (1.570)
C Piston pin bore
Max.
9. 030 (0.3555)
D Piston ring groove
Max.
1. 6
(0.063)
E Piston ring side clearance
Max.
0. 1
(0.004)
F Piston pin outer diameter
Min.
8. 98 (0.3535)
G Piston ring width
Min.
1. 45 (0.057)
H Piston ring end gap
Max.
0. 5
(0.02)
K Con-rod small end bore
Max.
12. 025 (0.4734)
L Crankshaft runout
Max.
0. 05 (0.002)
M Sprocket bore
Max.
13. 07 (0.5146)
N Clutch drum bore
Max.
71. 5
(2.81)
P Sprocket wear limit
Max.
0. 5
(0.02)
1-5 Service limits
5K173
5K280
5K174
5K190
5K016
5K042
5K277
5K278
5K279
5K275
5K276
5K191B
A
B
C
D
F
G
H
K
L
M
P
N
E
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