Echo CS-400 User manual

01-40D-00 CS-400 1
0
SERVICE
MANUAL
SUPPLEMENT
CHAIN
SAW
ECHO:
CS-400
(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 products 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. 01-40D-00
ISSUED: 201002
INDEX

2
SERVICE INFORMA TION
CS-400
1 SERVICE INFORMA TION
1-1
Speci fi cations
Model CS-400
Dimensions Length* mm(in) 393 (15.47)
Width mm(in) 245 (9.65)
Height mm(in) 277 (10.91)
Dry weight* kg(lb) 4.6 (10.1)
Engine Type YAMABIKO, air-cooled, two-stroke, single cylinder
Rotation Clockwise as viewed from the output end
Displacement cm3(in3) 40.2 (2.453)
Bore mm(in) 40.0 (1.575)
Stroke mm(in) 32.0 (1.260)
Compression ratio 6.5
Carburetor Type Diaphragm, horizontal-draught, with purge bulb**
Model Walbro WT-985
Venturi size-Throttle bore mm(in) 13.50 - 15.85 (0.532 - 0.624)
Ignition Type CDI (Capacitor discharge ignition) system
with electronic timing advancer and speed governor
Spark plug BPM8Y (CANADA : BPMR8Y)
Exhaust
Muffler type Spark arrester muffler with catalyst
Starter Type Automatic rewind
Rope diameter x length mm(in) 3.0 x 900 (0.14 x 35.4)
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.)
0.41 (13.9)
Clutch
Type
Centrifugal, 3-shoe slide with 3-tension spring
Guide bar / Saw chain lubrication type Automatic with volume adjuster
Oil
Tank capacity
L (U.S.fl.oz.)
0.28 (9.5)
Sprocket
Type
Spur
Number of teeth
6
Pitch
in
3/8
Chain tensioner type Side Access
* Without guide bar and saw chain. ** Purge bulb on engine body
Cutting devices
Guide bar
Part No.
16A0ED3757
18A0ED3762
Called length in
16
18
Gauge in
0.050
Saw chain
Type
OREGON 91VG
Number of drive links
57
62
Pitch in
3/8
Gauge in
0.050

3
CS-400
SERVICE INFORMA TION
1-2 Technical
data
Engine
Idling speed RPM 2,650 +/- 250
Wide open throttle speed* RPM 12,000 - 12,600
Clutch engagement speed RPM 4,100
Service limit speed† RPM 3,200
Compression pressure MPa (kgf/cm2) (psi) 0.88 (8.9) (127)
Ignition system
Spark plug gap mm(in) 0.6 - 0.7 (0.024 - 0.028)
Minimum secondary voltage at 1,000 RPM
kV
15
Primary coil resistance
Ω
200 - 400
Secondary coil resistance
kΩ
1.5 - 2.2
Pole shoe air gaps
mm(in)
0.3 - 0.4 (0.012 - 0.016)
Ignition timing
at 3,000 RPM
°BTDC
10
at 8,000 RPM
°BTDC
32
at 10,000 RPM
°BTDC
34
PET-9000 Parameter
#1
317
#2
04
Carburetor
Idle adjust screw initial setting turns in** 1 3/8
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 Adjustable : 1.5 - 13 (0.05 - 0.40)
mL/min(U.S.fl.oz./min) (Factory set 7 mL/min)
BTDC: Before top dead center.
* With 16 in. guide bar and saw chain.
**Set idle adjust screw to contact throttle plate before initial setting.
† If clutch engagement speed is lower than service limit speed, replace clutch assembly with new one.

4
SERVICE INFORMA TION
CS-400
1-3 Torque limits
Descriptions
Size
kgf•cm
N•m
in•lbf
Starter
system
Starter pawl
M5
40 - 60
4 - 6
35 - 50
Starter case
M5**
25 - 35
2.5 - 3.5
22 - 30
Ignition
system
Magneto rotor (Flywheel)
M8
250 - 290
25 - 29
220 - 250
Ignition coil
M5
40 - 60
4 - 6
35 - 50
Ignition switch
M14
15 - 30
1.5 - 3
13 - 26
Spark plug
M14
150 - 170
15 - 17
130 - 150
Fuel
system
Carburetor
M5
30 - 45
3 - 4.5
26 - 40
Carburetor elbow
M5**
20 - 30
2 - 3
17 - 26
Intake bellows
M5
30 - 45
3.0 - 4.5
26 - 40
Clutch Clutch hub
LM10
300 - 400
30 - 40
260 - 350
Engine
Crankcase
M5*
70 - 110
7 - 11
60 - 95
Engine mount
M5
70 - 110
7 - 11
60 - 95
uffler
M5
80 - 110
8 - 11
70 - 95
Cylinder cover
M5
25 - 45
2.5 - 4.5
22 - 40
Others
Auto-oiler
M4
20 - 35
2.5 - 3.5
17 - 30
Front handle
M5**
45 - 65
4.5 - 6.5
40 - 55
Rear handle assembly
M5
30 - 50
3 - 5
26 - 45
M4
35 - 50
3.5 - 5
30 - 45
Handle lid
M4
10 - 20
1 - 2
9 - 17
Brake lever (Hand guard)
M5**
10 - 20
1 - 2
9 - 17
M4**
45 - 65
4.5 - 6.5
40 - 55
Sprocket guard plate
M4**
10 - 20
1 - 2
9 - 17
Chain catcher
M5
45 - 60
4.5 - 6
40 - 52
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 thread locking sealant (See below) ** Tapping screw
1-4 Special
repairing materials
Material
Location
Remarks
Adhesive
Ball bearing outer / crankcase
Loctite #675 or equivalent
Pulse pipe joint
Cushions
Loctite #424, ThreeBond #1741 or equivalent
Liquid gasket
Crankcase seams
Loctite #515 or equivalent
Grease
Auto-oiler worm
Lithium based grease or ECHO XTended
TM
Protection Lubricant
Clutch needle bearing
Handle cushions
Rewind spring
Starter center shaft
Chain brake (metal contact part)
Molybdenum grease (approx. 1 gram)

5
CS-400
SERVICE INFORMA TION
3
1-5 Service limits
A B C D
5K275 5K277 5K278 5K279
E F G H
5K280 5K016 5K042 5K276
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. 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)

6
SERVICE INFORMA TION
CS-400