Echo CS-355T User manual

00-36H-01 CS-355T 1
0
SERVICE
MANUAL
SUPPLEMENT
CHAIN SAW
ECHO:
CS-355T
(Serial number : 11000001-11999999)
(Serial
number : 12000001-12999999)
(Serial number : 13000001-13999999)
INTRODUCTION
CONTENTS
page
We are constantly working on technical im-
provement of our products. For this reason,
technical data, equipment and design are
subject to change without notice. All speci-
fications and directions in this SERVICE
MANUAL SUPPLEMENT are based on the
latest product information available at the
time of publication.
1 SERVICE INFORMATION.............................. 2
1-1 Specification ............................................... 2
1-2 Technical data............................................. 3
1-3 Torque limits................................................ 4
1-4 Special repairing materials ......................... 4
1-5 Service limits............................................... 5
1-6 Special tools ............................................... 6
2 CARBURETOR ADJUSTMENT PROCEDURE .... 7
2-1 General adjusting rules............................... 7
2-2 Presetting Idle adjust screw, L mixture needle
and H mixture needle ........................................ 7
2-3 Adjusting carburetor.................................... 8
Reference No. 00-36H-01
REVISED:201210
ISSUED: 201207

2
SERVICE INFORMATION
CS-355T
1 SERVICE INFORMATION
1-1 Specifications
Model
CS-355T
Dimensions
Length*
mm(in)
287 (11.30)
Width mm(in)
244 (9.61)
Height mm(in)
220 (8.66)
Dry weight*
kg(lb)
3.5 (7.7)
Engine Type YAMABIKO, air-cooled, two-stroke, single cylinder
Rotation Clockwise as viewed from the output end
Displacement cm3(in3) 35.8 (2.184)
Bore mm(in) 39.0 (1.535)
Stroke mm(in) 30.0 (1.181)
Compression ratio 7.1
Diaphragm horizontal-draught
Carburetor Type
with separated purge bulb
Model WALBRO WT-1049
Venturi size-Throttle bore mm(in) 13.5 - 15.85 (0.531 - 0.624)
Ignition Type CDI (Capacitor discharge ignition) system
Digital Magneto with stop holding function
Spark plug BPM8Y (CANADA : BPMR8Y)
Starter Type i-15
Rope diameter x length mm(in) 3.0 x 950 (0.12 x 36.2)
Fuel Type Premixed two-stroke fuel
Mixture ratio 50 : 1 (2 %)
Petrol Minimum 89 octane petrol
Two-stroke air cooled engine oil ISO-L-EGD (ISO/CD13738), JASO M345-FC/FD
Tank capacity L (U.S.fl.oz.) 0.33 (11.2)
Exhaust
Muffler type
Spark arrester muffler
Clutch Type
Centrifugal, 3-shoe slide with 3-tension spring
Guide bar / Saw chain lubrication type Adjustable automatic oil pump
Oil Tank capacity L (U.S.fl.oz.) 0.243 (8.2)
Auto oiler
Type
Clutch related type
Sprocket Type
Spur
Number of teeth
6
Pitch
in
3/8
* Without guide bar and saw chain.
Cutting devices
Guide bar
Part No.
14A0ED3752
16A0ED3757
Called length in 14 16
Gauge in
0.050
Saw chain
Type Oregon 91PX
Number of drive links
52
57
Pitch in
3/8
Gauge in
0.050

3
CS-355T
SERVICE INFORMATION
1-2 Technical data
Engine
Idling speed RPM 2,800 -100
+500
Wide open throttle speed*
RPM
13,800 - 14,500
Clutch engagement speed RPM
4,300
Engagement Minimum†
RPM
3,600
Compression pressure
MPa (kgf/cm2) (psi)
1.03 (10.5) (149)
Ignition system with stop holding function
Spark plug gap mm(in) 0.6 - 0.7 (0.024 - 0.028)
Minimum secondary voltage at 1,000 RPM kV 20
Primary coil resistance
(Red Probe on stop terminal of module) MΩ2.2 -2.6
Secondary coil resistance Ω970 - 1010
Pole shoe air gaps mm(in) 0.3 - 0.4 (0.012 - 0.016)
Ignition timing at 3,000 RPM
°BTDC 6
at 8,000 RPM °BTDC 34
at 10,000 RPM °BTDC 33
at 14,000 RPM °BTDC Revolution limiter
Carburetor
Idle adjust screw initial setting turns in** 1 3/8
L mixture needle initial setting
H mixture needle initial setting
Test Pressure, minimum
MPa (kgf/cm2) (psi)
0.05 (0.5) (7.0)
Metering lever height
mm(in)
1.65 (0.06) lower than diaphragm seat
Chain oil discharge volume at 7,000 RPM
mL/min(U.S.fl.oz./min)
Fixed 7.0 mL/min
BTDC: Before top dead center.
* With 14 in. guide bar and properly adjusted saw chain.
**Set Idle adjust screw to the point that its tip contacts throttle plate before initial setting.
† If clutch engagement speed is lower than minimum clutch engagement speed, replace clutch assembly with
new one.

4
SERVICE INFORMATION
CS-355T
1-3 Torque limits
Descriptions
Size
kgf•cm
N•m
in•lbf
Starter
system
Starter pawl
M5*
30 - 45
3 - 4.5
26 - 40
Starter case
M4
15 - 20
1.5 - 2
13 - 17
Ignition
system
Magneto rotor (Flywheel)
M8
250 - 290
25 - 29
220 - 255
Ignition coil
M5*
30 - 45
3 - 4.5
26 - 40
Spark plug
M14
130 - 170
13 - 17
110 - 150
Fuel
system
Carburetor
M5
20 - 30
2 - 3
17 - 26
Intake bellows
M5
30 - 50
3 - 5
26 - 45
Clutch Clutch hub
LM10
230 - 260
23 - 26
200 - 230
Engine
Crankcase
M5*
60 - 80
6 - 8
50 - 70
Engine mount
M5
70 - 110
7 - 11
60 - 95
Muffler
M5
70 - 100
7 - 10
60 - 90
Muffler cover
M5
30 - 50
3 - 5
26 - 45
Others
Auto-oiler
M4
20 - 30
2 - 3
17 - 26
Front handle
M4*
15 - 30
1.5 - 3
13 - 26
Rear handle assembly
M5
15 - 30
1.5 - 3
13 - 26
Harness fixture
M5
60 - 90
6 - 9
50 - 80
Cap cover
M5
30 - 45
3 - 4.5
26 - 40
Sprocket guard
M4
15 - 25
1.5 - 2.5
13 - 22
Brake lever
M5
25 - 40
2.5 - 4
22 - 35
Spike
M5
30 - 50
3 - 5
26 - 45
Guide bar
M8
200 - 230
20 - 23
175 - 200
Regular bolt, nut and screw
M3
6 - 10
0.6 - 1
5 - 9
M4
15 - 25
1.5 - 2.5
13 - 22
M5
25 - 45
2.5 - 4.5
22 - 40
M6
45 - 75
4.5 - 7.5
40 - 65
LM: Left-hand thread *Apply special repairing materials
1-4 Special repairing materials
Material
Location
Remarks
Adhesive
Ball bearing outer / crankcase
Loctite #675 or equivalent
Stud bolt
Liquid gasket
Crankcase seams
ThreeBond 1207D
Thread locking sealant
Starter pawl
Loctite #222, ThreeBond #1342 or equivalent
Ignition coil
Grease
Clutch needle bearing
Lithium based grease or ECHO XTended
Protection TM Lubricant
Starter center shaft
Chain brake (metal contact part)
Molybdenum grease (approx.1 gram)

5
CS-355T
SERVICE INFORMATION
5K097
1-5 Service Limits
A B C D
5K177 5K083 5K084 5K081
E F G H
5K082 5K016 5K025 5K178
K L M P
N
5K173
5K174 5K190
5K191
Description mm (in)
A Cylinder bore When plating is worn and aluminum can be seen
B Piston outer diameter Min. 38. 87 (1.530)
C Piston pin bore Max. 8. 035 (0.3163)
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. 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. 11. 025 (0.4341)
L Crankshaft runout
Max. 0. 01 (0.001)
M Sprocket bore
Max. 12. 80 (0.5039)
N Clutch drum bore Max. 61. 5 (2.42)
P Sprocket wear limit Max. 0. 5 (0.02)

6
SERVICE INFORMATION
CS-355T