Echo CS-420ES - Manual (Page 5)

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