Echo CS-310 Service Manual

SERVICE INFORMATION
CS-310
5
1-5 Service Limits
5K177 5K083 5K084 5K081
5K082 5K016 5K025
5K174 5K181 5K097
5K178
5K173
5K191
ABCD
FGH
KLMP
N
E
Description
mm (in)
A Cylinder bore When plating is worn and aluminum can be seen
B
Piston outer diameter Min. 35. 91 (1.414)
C
Piston pin bore Max. 8. 035 (0.3163)
D
Piston ring groove Max. 0. 6 (0.024)
E
Piston ring side clearance Max. 0. 1 (0.004)
F
Piston pin outer diameter Min. 7. 98 (0.3142)
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. 000 (0.4724)
L
Crankshaft runout Max. 0. 01 (0.001)
M
Sprocket bore Max. 10. 80 (0.4252)
N
Clutch drum bore Max. 61. 5 (2.42)
P
Sprocket wear limit Max. 0. 5 (0.02)

Echo CS-310 Specifications

General

Engine Displacement	30.5 cc
Bar Length	14 inches
Weight	8.8 lbs
Chain Pitch	3/8 inch
Chain Gauge	0.050 inch