CS-2600ES, CS-2700ES00-26B-02
1
0
(Serial number : 36000001 and after)
INTRODUCTION
We are constantly working on technical
improvement of our products. For this reason,
technical data, equipment and design are
subject to change without notice. All
specifications, illustrations and directions in
this SERVICE DATA are based on the latest
products information available at the time of
publication.
ECHO SERVICE MANUAL Ord. 40122(Model : CS-2600) contains lots of
information for servicing this model.
CONTENTS
page
1 SERVICE INFORMATION .............................2
1-1 Specification...............................................2
1-2 Technical data ............................................3
1-3 Torque limits ............................................... 4
1-4 Special repairing materials.........................5
1-5 Service limits .............................................. 6
1-6 Special tools...............................................7
2 EMISSION ADJUSTMENT GUIDE ...............8
2-1 General adjusting rules .............................. 8
2-2 Presetting idle adjust screw, L mixture needle
and H mixture needle....................................... 8
2-3 Adjusting carburettor................................ 10
Reference No. 00-26B-02
REVISED: 200512
Issued:2004 1 2
INDEX
CS-2600ES
2
1 SERVICE INFORMATION
1-1 Specifications
Model CS-2600, CS-2600ES CS-2700ES
Dimensions Length* mm(in) 257 (10.1) 380 (15.0)
Width mm(in) 219 (8.6) 220 (8.7)
Height mm(in) 210 (8.3) 230 (9.1)
Dry weight* kg(lb) 2.9 (6.4) 3.1 (6.8)
Engine Type KIORITZ, air-cooled, two-stroke, single cylinder
Rotation Clockwise as viewed from the output end
Displacement cm3(in3) 26.9 (1.641)
Bore mm(in) 35 (1.378)
Stroke mm(in) 28 (1.102)
Compression ratio 5.5
Carburettor Type Diaphragm horizontal-draught with auto-return choke
Model (Walbro) WT-696, WT-696A, WT-696B WT-697A, WT-697B
Venturi size-Throttle bore mm(in) 9.53 - 14.3 (0.375 - 0.563)
Ignition Type CDI (Capacitor discharge ignition) system
Spark plug BPMR-7A
Starter Type ES (Effortless)-start
Rope diameter x length mm(in) 3.5 x 750 (0.14 x 29.5)
Fuel Type Premixed two-stroke fuel
Mixture ratio 50 : 1 (2 %)
Petrol Minimum 89 octane petrol (RON)
Two-stroke air cooled engine oil ISO-L-EGD (ISO/CD13738), JASO FC
Tank capacity L (U.S.fl.oz.) 0.39 (13.2) 0.24 (8.1)
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.) 0.16 (5.4)
Sprocket Type Spur
Number of teeth 6 (Sproket nose bar) 8 (for Carving bar)
Pitch in 3/8 (Sproket nose bar) 1/4 (for Carving bar)
SERVICE INFORMATION
with electronic timing advancer
CS-2700ES
* Without guide bar and saw chain.
Cutting devices Sproket nose bar Carving
Guide bar Type 20RC50-3/8 25RC50-3/8 30RC50-3/8 25C50
Called length cm 20 25 30 25
Gauge in 0.050
Saw chain Number of drive links 35 40 47 60
Pitch in 3/8 1/4
Gauge in 0.050
CS-2600ES
CS-2700ES
1-2 Technical data
Model CS-2600, CS-2600ES CS-2700ES
Engine
Idling speed r/min 3000 - 3600
Operating speed r/min 8500 - 9000
High speed (No load full throttle)* r/min 10500 - 11500
Clutch engagement speed r/min 4450 - 4750
Compression pressure MPa (kgf/cm2) (psi) 0.69 (7.0) (100)
Ignition system
Spark plug gap mm(in) 0.6 - 0.7 (0.024 - 0.028)
Minimum secondary voltage at 1500 r/min kV 15
Secondary coil resistance kΩ 1.2 - 1.8
Pole shoe air gaps mm(in) 0.30 - 0.40 (0.012 - 0.016)
Ignition timing at 1500 r/min °BTDC 12
at 7500 r/min °BTDC 29
Carburettor
Idle adjust screw initial setting turns in** 1 7/8 1 7/8
L mixture needle initial setting turns back 2 3/8 2 3/8
H mixture needle initial setting turns back 2 3/8 2 1/2
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 7000 r/ min Adjustable: 1.5 - 13 (0.05 - 0.40)
mL/min(U.S.fl.oz./min) (Factory set 7 mL/min)
BTDC: Before top dead centre.
*With 25cm guide bar and saw chain.
**Set idle adjust screw to contact throttle plate before initial setting.
SERVICE INFORMATION
3
CS-2600ES
4
1-3 Torque limits
Descriptions Size kgf•cm N•m in•lbf
Starter Starter pawl M5* 40 - 60 4 - 6 35 - 50
system
Ignition Magneto rotor (Flywheel) M8 160 - 200 16 - 20 140 - 175
system
Fuel Carburettor M5 30 - 45 3.0 - 4.5 26 - 40
system
Clutch Clutch hub LM10 230 - 260 23 - 26 200 - 230
Engine Crankcase M5*
Dust cover (Only CS-2600) M4** 10 - 20 1 - 2 9 - 18
Muffler M5 70 - 100 7 - 10 60 - 90
Others Auto-oiler M4 15 - 25 1.5 - 2.5 13 - 22
Regular bolt, nut and screw M3 6 - 10 0.6 - 1.0 5 - 9
Starter case M4** 10 - 20 1 - 2 9 - 18
Ignition coil M5* 30 - 45 3.0 - 4.5 26 - 40
Spark plug M14 130 - 170 13 - 17 115 - 150
Intake bellows M5 35 - 50 3.5 - 5.0 30 - 44
Engine mount M5 70 - 110 7 - 11 60 - 95
Muffler cover M4** 10 - 20 1 - 2 9 - 18
Front handle M5** 20 - 40 2 - 4 18 - 35
(CS-2600ES) M4** 10 - 20 1 - 2 9 - 18
(CS-2700ES) M4** 8 - 12 0.8 - 1.2 7 - 10
Top handle (CS-2600ES) M4** 10 - 20 1 - 2 9 - 18
Rear handle (CS-2700ES) M4** 10 - 20 1 - 2 9 - 18
Top handle assembly
(CS-2600ES)
Rear handle assembly
(CS-2700ES)
Brake lever (Hand guard) M5 25 - 45 2.5 - 4.5 22 - 40
Chain catcher M5** 20 - 40 2 - 4 18 - 35
Guide bar stud M8 180 - 250 18 - 25 130 - 220
Guide bar M8 200 - 230 20 - 23 175 - 200
SERVICE INFORMATION
†
M4** 20-30 2-3 18-26
M4** 20-30 2-3 18-26
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
55 - 95 5.5 - 9.5 48 - 83
CS-2700ES
LM: Left-hand thread *Apply thread locking sealant (See next page) ** Tapping screw
†
The torque differences among four bolts should not exceed 20 kgf•cm (2Nm, 17in•lbf) on one cylinder or
crankcase.
CS-2600ES
CS-2700ES
1-4 Special repairing materials
Material Location Remarks
Adhesive Ball bearing outer / crankcase Loctite #675 or equivalent
Liquid gasket Crankcase seams Loctite #515: 990610-00051 or equivalent
Thread locking sealant Starter pawl screws Loctite #242, Three bond 1324 or equivalent
Ignition coil
Crankcase bolts
Grease Auto-oiler worm
Clutch needle bearing
Rear handle cushion Lithium based grease
Rewind spring
Starter center shaft
Chain brake (metal contact part) Molybdenum grease (approx. 1 gram)
SERVICE INFORMATION
Loctite #222, Three bond 1342 or equivalent
5
CS-2600ES
1
2
3
4
6
1-5 Service Limits
ABCD
SERVICE INFORMATION
CS-2700ES
E
K
FGH
LMP
N
mm (in)
A Cylinder bore When plating is worn and aluminium can be seen
B Piston outer diameter Min. 34.91 (1.374)
C Piston pin bore Max. 8.030 (0.3161)
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. 7.980 (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. 12.0 (0.4724)
L Crankshaft runout Max. 0.05 (0.002)
M Sprocket bore Max. 13.08 (0.515)
N Clutch drum bore Max. 55.5 (2.19)
P Sprocket wear limit Max. 0.5 (0.02)
CS-2600ES
20
40
60
80
120
140
160
180
20
100
CS-2700ES
1-6 Special tools
SERVICE INFORMATION
7
1
2
3
6
10 11
14
15
a = 3 mm
a = 4 mm
7
45
8
12
16 18
17
ba
9
1.65
1.35
0.4
1.5
13
80
100
19
60
120
40
140
20
160
180
20
2600
Key Part Number Description Used for:
1 897801-33330 Tachometer PET-1000 Measuring engine speed to adjust carburettor
2 895612-79920 L-hex wrench (3 mm) Removing and installing hex. socket bolt (M4)
3 895610-79920 L-hex wrench (4 mm) Removing and installing hex. socket bolt (M5)
4 897559-02831 T-hex wrench (4 mm) Removing and installing hex. socket bolt (M5)
5 897501-03938 Puller Removing magneto rotor
6 897702-30131 Piston pin tool Removing and installing piston pin
7 897701-06030 Bearing wedge Removing and crankshaft ball bearings
8 897705-11520 Bearing tool Replacing needle bearing on con-rod small end
9 897563-19830 Metering lever gauge Measuring metering lever hight on carburettor
10 897708-19835 Worm puller Removing auto-oiler worm
11 Y089-000010 Worm inserter Installing auto-oiler worm
12 897726-09130 Oil seal tool Installing oil seals
13 897800-79931 Spark tester Checking ignition system
14 897803-30132 Pressure tester Testing carburettor and crankcase leakage
15 X640-000011 Clutch tool Removing and assembling clutch assembly
16 897826-16131 Pressure rubber plug Plugging intake port to test crankcase / cylinder leakages
17 897828-12330 Pressure rubber plug Plugging intake port to test crankcase / cylinder leakages
18 897835-16131 Pressure connector Checking crankcase and cylinder leakages
19 91007 Compression gauge Measuring cylinder compression
CS-2600ES
H
L
8
2 EMISSION ADJUSTMENT GUIDE
2-1 General adjusting rules
A. Before starting the unit for adjustment, check the following items.
1. The correct spark plug must be clean and properly gapped.
2. The air filter element must be clean and properly installed.
3. The muffler exhaust port must be clear of carbon.
4. The fuel lines, tank vent and fuel filter are in good condition and clear of debris.
5. The fuel is fresh ( > 89 octane : RON) and properly mixed at 50 : 1 with “ISO L-EGD” 2-stroke oil.
6. The recommended bar and chain must be installed to the power head, and properly tensioned.
NOTE : Make sure of proper installation of guide bar and saw chain when adjusting carburettor, or
serious engine damage will occur due to overspeeding.
B. Adjust carburettor turning L and H mixture needles with limiter caps within the moving range (approx. 90°)
and idle adjust screw. When engine does not run correctly after this adjustment, proceed to the next step
(2-2).
C. After adjusting carburettor according to the steps 2-2 and 2-3, the limiter cap(s) must be installed on L
and/or H mixture needle(s) to comply with Emission Directive.
SERVICE INFORMATION
CS-2700ES
2-2 Presetting idle adjust screw, L mixture needle and H mixture needle
1. Turn the L and H mixture needles anticlockwise
to rich side stop and meet limiter caps tabs (A) with
locating slot (B), using 3 mm blade screw driver.
(B)
(A)
2. Screw left hand thread of limiter cap tool 91019
into centre hoIe of limiter cap anticlockwise until tab
of the limiter cap just come out from locating slot.
NOTE : If cap tabs (A) misalign with locating slots
(B), there is a chance to strip thread. When the
thread is stripped by limiter cap tool, screw 3 mm
wood screw in the stripped centre hole of the limiter
cap, and pull off the cap.
(A)
(B)
(continued)
CS-2600ES
CS-2700ES
2-2 Presetting idle adjust screw, L mixture needle and H mixture needle (continued)
SERVICE INFORMATION
3. Remove the limiter cap tool from the limiter cap
turning the tool clockwise as the limiter cap is
remained there.
NOTE : If the limiter cap were pulled out completely ,
there is a chance that the other mixture needle would
turn and limiter cap tab would misalign with locating
slot when screwing the limiter cap tool into centre
hole of the other limiter cap.
4. Screw thread of limiter cap tool 91019 into other
centre hole of the other limiter cap anticlockwise until
the limiter cap is come out from the mixture needle
completely . Remove the limiter cap from limiter cap
tool turning clockwise. Screw thread of limiter cap
tool 91019 into centre hole of previous limiter cap to
pull out completely.
9
5. Turn L and H mixture needle clockwise until lightly
seated, and then turn both mixture needles
anticlockwise following turns.
CS-2600, CS-2600ES :
L mixture needle : 2 3/8,
CS-2700ES : L mixture needle : 2 3/8,
NOTE : If needles are forced during seating, damage
to carburettor may occur.
6. CS-2600, CS-2600ES : Remove cleaner lid and
cleaner case to confirm throttle plate on carburettor
visually. CS-2700ES : Remove cleaner lid to
confirm throttle plate on carburettor visually.
7. Turn idle adjust screw anticlockwise and set the
screw until the tip to just contact throttle plate. Then
turn idle adjust screw 1 7/8 turns clockwise. Install
all removed parts.
H mixture needle : 2 3/8
H mixture needle : 2 1/2
10
2-3 Adjusting carburettor
SERVICE INFORMATION
CS-2600ES
CS-2700ES
idle adjust screw
L
1. Start engine and warm it up well for 70 seconds
as follows.
(1) 5 seconds at idle and 5 seconds at WOT.
(2) 5 seconds at idle and 5 sedonds at WOT.
(3) 5 seconds at idle and 10 seconds at WOT.
Repeat above (1) to (3) again.
H
2. Using 2.5 mm wide blade screw driver, adjust L
mixture needle to obtain maximum idle speed.
3. Set idle speed to 4,400 r/min by turning idle adjust
screw.
4. Turn L mixture needle anticlockwise to reduce
engine idle speed 1,000 to 1,100 r/min to set idle
speed in the range of 3,300 to 3,400 r/min.
NOTE : Engine speed must be allowed to stabilize
a minimum of 20 seconds after each adjustment of
L mixture needle to assure accurate tachometer
readings.
5. Turn H mixture needle clockwise to obtain
approx. 12,000 r/min at WOT.
6. Adjust WOT engine speed in the range of 10,700
to 11,200 r/min by turning H mixture needle
anticlockwise.
NOTE : During H mixture needle adjustment, do not
run engine at high speed without load longer than
10 seconds.
7. If the engine speed at WOT is above 11,200
r/min, adjust H mixture needle anticlockwise and set
maximum engine speed at less than 11,200 r/min.
(Continued)
CS-2600ES
CS-2700ES
2-3 Adjusting carburettor (Continued)
(B)
L
(A)
SERVICE INFORMATION
8. After adjusting carburettor, put new limiter cap on
the other side of limiter cap tool as shown, and press
the limiter caps to the bottoms on L and H mixture
needles respectively.
NOTE : Align the limiter cap’s tabs (A) with locating
slots (B) in extended housing of carburettor.
H
(A)
(B)
IMPORT ANT : The limiter caps must be installed
L and H mixture needles to comply with
Emission Directive.
9. Start engine again and make it sure engine runs
at idle speed in the range of 3,000 to 3,600 r/min
and at WOT engine speed in the range of 10,500 to
11,500 r/min. Also make it sure chain would not
turn at engine idle speed and suitable acceleration.
11
NOTE : Initial carburettor setting (Idle adjust screw,
L and H mixture needles) shown here is to start the
engine after restoration or carburettor change. Idle
adjust screw, L and H needles turn for designated
engine revolution through procedures indicated here
may vary . As long as idle and WOT engine speed is
set in given range, variance would be ignorable.
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