Echo CS-352 User manual

01-34C-00 CS-352 1
0
SERVICE
MANUAL
SUPPLEMENT
CHAIN SAW
ECHO:
CS-352
(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
DATA are based on the latest product infor-
mation 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.................................... 9
Reference No. 01-34C-00
ISSUED: 201012

2
SERVICE INFORMATION
CS-352
1 SERVICE INFORMA TION
1-1
Speci fi cations
Model
CS-352
Dimensions
Length*
mm(in)
396 (15.59)
Width mm(in)
232 (9.13)
Height mm(in)
268 (10.55)
Dry weight*
kg(lb)
4.0 (8.8)
Engine Type YAMABIKO, air-cooled, two-stroke, single cylinder
Rotation Clockwise as viewed from the output end
Displacement cm3(in3) 34.0 (2.075)
Bore mm(in) 38.0 (1.496)
Stroke mm(in) 30.0 (1.181)
Compression ratio 6.8
Carburetor Type Diaphragm horizontal-draft with auto-return choke
Model Walbro WT-992
Venturi size-Throttle bore mm(in) 11.11 - 14.3 (0.437 - 0.562)
Ignition Type CDI (Capacitor discharge ignition) system
Digital magneto
Spark plug BPM8Y
Starter Type Automatic rewind
Rope diameter x length mm(in) 3.0 x 920 (0.12 x 36.2)
Fuel Type Premixed two-stroke fuel
Mixture ratio 50 : 1 (2 %)
Gasoline Minimum 89 octane gasoline
Two-stroke air cooled engine oil ISO-L-EGD (ISO/CD13738), JASO M345-FC/FD
Tank capacity L (U.S.fl.oz.) 0.25 (8.5)
Exhaust Muffler type
Spark arrester muffler with catalyst
Clutch
Type
Centrifugal, 3-shoe slide with 3-tension spring
Guide bar / Saw chain lubrication type Pencil type Automatic oil pump
Oil Tank capacity L (U.S.fl.oz.) 0.26 (8.8)
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. 12A0CD3745 14A0CD3752 16A0CD3757
Called length in
12
14
16
Gauge in
0.050
Saw chain
Type
OREGON 91VG / 91P
Number of drive links 45 52 57
Pitch in 3/8
Gauge in 0.050

CS-352
SERVICE INFORMATION 3
1-2
Technical data
Engine
Idling
s peed
W ide open throttle s peed*
C lutch e ng a gement s peed
R P M
R P M
R P M
3 , 000 +/- 300
11 , 700 - 13 , 200
4 , 200
Minimum†
RPM 3,800
Compression pressure MPa (kgf/cm
2
) (psi) 0.94 (9.6) (136)
Ignition system
S p a rk plug g a p mm(in) 0 . 6 - 0 . 7 ( 0 . 024 - 0 . 028)
Minimum
secondary voltageat 1,500 RPM kV 15.0
Primary coil resistance
(RedProbe on stopterminal of module)
S e c on d a ry coil r e s i s t a nce
kO
1.2 -1.6
kO
1.3 -1.9
P ole s hoe a ir g a p s
Ignition
t i m i ng
P E T-9000 P a r a meter
Carburetor
a t 3 , 000 R P M
a t 8 , 000 R P M
a t 10 , 000 R P M
P a r a meter 1
P a r a meter 2
mm(in)
° B T D C
° B T D C
° B T D C
0 . 3 - 0 . 4 ( 0 . 012 - 0 . 016 )
8
34
38
322
04
Idle adjust screw initial setting turnsin** 11/2
Test Pressure, minimum MPa (kgf/cm
2
) (psi) 0.05 (0.5) (7.0)
Metering lever h
e i gh t
Chain oil discharge volumeat 7,000 RPM mm
( i n )
mL/min(U.S. 0 .oz./min)
1 . 65 ( 0 . 06) lower t h a n d i a p hr a gm s e a t
Fixed 7.8 mL/min
BTDC: Before top dead cente r .
* With 14 in.guide barandproperly adjusted saw chain.
**Set idle adjust screw to the point that itstip contacts throttle plate before initial setting.
† Ifclutch
engagement speed is lower than minimum RPM, replace clutch assembly with new one.

4
SERVICE INFORMATION
CS-352
1-3 Torque limits
Descriptions
Size
kgf•cm
N•m
in•lbf
Starter
system
Starter case
M5
30 - 50
3 - 5
26 - 45
Collar
M5
35 - 50
3.5 - 5
30 - 45
Ignition
system
Magneto rotor (Flywheel)
M8
250 - 290
25 - 29
220 - 255
Ignition coil
M5*
30 - 45
3 - 4.5
26 - 40
ON/OFF switch
M6
15 - 30
1.5 - 3
13 - 26
Spark plug
M14
130 - 170
13 - 17
110 - 150
Fuel
system Carburetor
M5
35 - 50
3.5 - 5
30 - 45
M5
30 - 45
3 - 4.5
26 - 40
Clutch Clutch hub
LM10
230 - 260
23 - 26
200 - 230
Engine
Crankcase
M5*
60 - 100
6 - 10
60 - 90
Engine mount
M5
70 - 110
7 - 11
60 - 95
Muffler
M5
70 - 90
7 - 9
60 - 80
Intake insulator
M5
50 - 70
5 - 7
45 - 60
Others
Front handle
M5
30 - 50
3 - 5
26 - 45
Rear handle assembly
M5
30 - 50
3 - 5
26 - 45
Brake lever
M4
25 - 35
2.5 - 3.5
22 - 30
Brake cover
M4
15 - 25
1.5 - 2.5
13 - 22
Compression spring
M5
30 - 50
3 - 5
26 - 45
Sprocket guard
M4
10 - 20
1 - 2
9 - 17
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 #242, ThreeBond #1324 or equivalent
Ignition coil
Loctite #222, ThreeBond #1342 or equivalent
Grease
Clutch needle bearing
Lithium based greaseor ECHO XTended
Protection
TM
Lubricant
Starter center shaft
Chain brake (metal contact part)
Molybdenum grease (approx.1 gram)

5K097
CS-352 SERVICE INFORMATION 5
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. 37. 91 (1.493)
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. 12. 000 (0.4724)
L Crankshaft runout
Max. 0. 02 (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)

6
SERVICE INFORMATION
CS-352