Echo CS-310ES Mounting instructions

CS-310ES
01-30B-00 1
INTRODUCTION
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, illustrations and directions in this
SERVICE DATA are based on the latest
product information available at the time of
publication.
0
SERVICE DATA
CHAIN SAW
CS-310ES
STAGE MODEL
(Serial number : 37000001 and after)
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 ......................... 4
1-5 Service limits............................................... 5
1-6 Special tools ............................................... 6
2 CARBURETTOR 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 carburettor................................... 9
Reference No. 01-30B-00
ISSUED: 200812

SERVICE INFORMATION CS-310ES
2
Cutting devices
Guide bar Type 30RC43S-3/8 30RC50M-3/8 35RC43S-3/8 35RC50M-3/8
Called length cm 30 35
Gauge in 0.043, 0.050
Saw chain Type CARLTON N1C-BL OREGON 91VX / 91VG / 90SG
Number of drive links 45 47 52 53
Pitch in 3/8
Gauge in 0.043, 0.050
1 SERVICE INFORMATION
1-1 Specifications
Model CS-310ES
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 KIORITZ, air-cooled, two-stroke, single cylinder
Rotation Clockwise as viewed from the output end
Displacement cm3(in3) 30.5 (1.861)
Bore mm(in) 36.0 (1.417)
Stroke mm(in) 30.0 (1.181)
Compression ratio 6.7
Carburettor Type Diaphragm horizontal-draught with auto-return choke
Model Walbro WT-946
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 BPMR8Y
Starter Type ES(effortless-start)
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 %)
Petrol Minimum 89 octane petrol
Two-stroke air cooled engine oilISO-L-EGD (ISO/CD13738), JASO 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 Automatic
Oil Tank capacity L (U.S.fl.oz.) 0.26 (8.8)
Sprocket Type Spur
Number of teeth 6
Pitch in 3/8
* Without guide bar and saw chain.

SERVICE INFORMATION
CS-310ES 3
1-2 Technical data
Engine
Idling speed r/min 3,200 +/- 400
Wide open throttle speed* r/min 12,000 - 13,000
Clutch engagement speed r/min 4,000 - 4,500
Compression pressure MPa (kgf/cm2) (psi) 0.88 (9.0) (128)
Ignition system
Spark plug gap mm(in) 0.6 - 0.7 (0.024 - 0.028)
Minimum secondary voltage at 1500 r/min kV 15.0
Primary coil resistance Ω140 - 180
Secondary coil resistance kΩ1.9 - 2.3
Pole shoe air gaps mm(in) 0.3 - 0.4 (0.012 - 0.016)
Ignition timing at 1,000 r/min °BTDC 14
at 3,000 r/min °BTDC 12
at 8,000 r/min °BTDC 33
at 10,000 r/min °BTDC 35
at 12,000 r/min °BTDC 33
Carburettor
Idle adjust screw initial setting turns in** 7/8
L mixture needle initial setting turns back 2 1/2
H mixture needle initial setting turns back 2 1/4
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 Fixed 7 mL/min
mL/min(U.S.fl.oz./min)
BTDC: Before top dead centre.
* With 30/35 cm guide bar and properly adjusted saw chain.
**Set idle adjust screw to the point that its tip contacts throttle plate before initial setting.

SERVICE INFORMATION CS-310ES
4
1-3 Torque limits
Descriptions Size kgf•cm N•m in•lbf
Starter Starter pawl M 5* 30 - 45 3 - 4.5 26 - 40
system Starter case M 5** 35 - 50 3.5 - 5 30 - 45
Ignition Magneto rotor (Flywheel) M 8 250 - 290 25 - 29 220 - 255
system Ignition coil M 5* 30 - 45 3 - 4.5 26 - 40
Ignition switch M 10 15 - 30 1.5 - 3 13 - 26
Spark plug M 14 130 - 170 13 - 17 110 - 150
Fuel Carburettor M 5** 35 - 50 3.5 - 5 30 - 45
system
M 5** 30 - 45 3 - 4.5 26 - 40
Clutch Clutch hub LM 10 230 - 260 23 - 26 200 - 230
Engine Crankcase M 5* 60 - 80 6 - 8 60 - 70
Engine mount M 5** 70 - 110 7 - 11 60 - 95
Muffler M 5 70 - 90 7 - 9 60 - 80
Intake insulator M 5 50 - 70 5 - 7 45 - 60
Others Front handle M 5** 30 - 50 3 - 5 26 - 45
Rear handle assembly M 5** 30 - 50 3 - 5 26 - 45
Brake lever M 4 25 - 35 2.5 - 3.5 22 - 30
Sprocket guard M 4** 10 - 20 1 - 2 9 - 17
Guide bar M 8 200 - 230 20 - 23 175 - 200
Regular bolt, nut and screw M 3 6 - 10 0.6 - 1 5 - 9
M 4 15 - 25 1.5 - 2.5 13 - 22
M 5 25 - 45 2.5 - 4.5 22 - 40
M 6 45 - 75 4.5 - 7.5 40 - 65
LM: Left-hand thread *Apply special repairing materials ** Tapping screw
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
Engine mount
Ignition coil Loctite #222, ThreeBond #1342 or equivalent
Grease Clutch needle bearing Lithium based grease
Starter centre shaft
Chain brake (metal contact part) Molybdenum grease (approx.1 gram)

SERVICE INFORMATION
CS-310ES 5
1-5 Service Limits
5K177 5K083 5K084 5K081
5K082 5K016 5K025
5K174 5K181 5K097
5K178
5K173 5K191
DCBA
HGF
PMLK
N
E
Description mm (in)
A Cylinder bore When plating is worn and aluminium can be seen
BPiston outer diameter Min. 35. 91 (1.414)
CPiston pin bore Max. 8. 035 (0.3163)
DPiston ring groove Max. 1. 5 (0.063)
EPiston ring side clearance Max. 0. 1 (0.004)
FPiston pin outer diameter Min. 7. 98 (0.3142)
GPiston ring width Min. 1. 45 (0.057)
HPiston ring end gap Max. 0. 5 (0.02)
KCon-rod small end bore Max. 12. 000 (0.4724)
LCrankshaft runout Max. 0. 01 (0.001)
MSprocket bore Max. 10. 80 (0.4252)
NClutch drum bore Max. 61. 5 (2.42)
PSprocket wear limit Max. 0. 5 (0.02)

SERVICE INFORMATION CS-310ES
6
1.35
0.4
1.65
1.5
Ignition Air Gap Gauge
#.014 = .35mm
P/N 91004
0
0.4
50
0.8
1.2
1.
MPa
0
b
1207D
91019
1-6 Special tools
134
2
58
910 1211
13
7
6
1514 16
Key Part Number Description Reference
1 897801-33330 Tachometer PET-1000 Measuring engine speed
2 X605-000050 Torx L wrench Removing and installing bolt
3 897501-03938 Puller Removing magneto rotor
4 897505-16133 Clutch tool Removing and assembling clutch assembly
5 91037 Compression gauge Measuring cylinder compression
6 897702-30131 Piston pin tool Removing and installing piston pin
7 897701-06030 Bearing wedge Removing and crankshaft ball bearings
8 897563-19830 Metering lever gauge Measuring metering lever height on carburettor
9 X686-000000 ThreeBond 1207D Applying crankcase seam
10 91019 Limiter cap tool Removing and installing limiter cap
11 897726-21430 Oil seal tool Installing oil seals and clutch plate
12 897800-79931 Spark tester Checking ignition system
13 897803-30133 Pressure tester Testing carburettor and crankcase leakage
14 500-500 Welch plug tool Removing and installing welch plug tool
15 X646-000030 Auto-oiler tool Installing pencil type Auto-oiler
16 91004 Module air gap gauge Adjusting pole shoe air gaps

SERVICE INFORMATION
CS-310ES 7
B
A
B
A
2 CARBURETTOR ADJUSTMENT PROCEDURE
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” or “JASO FC/
FD” 2-stroke oil.
6. The recommended bar and chain must be installed, and properly tensioned.
NOTE : In order to achieve proper carburettor adjustment, a 30 or 35 cm bar and chain combination
should be installed on the unit, otherwise serious engine damage will occur due to overspeeding.
B. Set L and H mixture needle anticlockwise to rich side stop. Start and run engine for two minutes al-
ternating r/min between WOT and idle every 5 seconds. Adjust idle adjust screw to 3,200 +/- 200 r/min.
Adjust H mixture needle to 12,500 +/- 300 r/min with limiter cap. If engine does not run correctly after this
adjustment, proceed to the next step 2-2.
IMPORTANT : After adjusting carburettor according to the steps 2-2 and 2-3, the limiter cap(s)
must be installed on L and H mixture needle(s) to comply with Emission Directive.
2-2 Presetting Idle adjust screw, L mixture needle and H mixture needle
Tools Required : Small screwdriver with 2.5 mm
blade, electronic tachometer P/N 897801-33330,
limiter cap removal tool with 2.5 mm left-hand
thread P/N 91019. Parts Required : (2) limiter caps
P/N P003-000010.
1. Turn the L and H mixture needles anticlockwise
to rich side stop to align limiter cap tab (A) with lo-
cating slot (B), using 2.5 mm blade screw driver.
NOTE : If cap tabs (A) misalign with locating slots
(B), the cap cannot be removed and the centre
hole threads will strip.
(continued)

SERVICE INFORMATION CS-310ES
8
2-2 Presetting Idle adjust screw, L mixture needle and H mixture needle (continued)
2. Screw 2.5 mm limiter cap removal tool P/N
91019 anticlockwise into centre hole of limiter cap
until tab of the limiter cap just comes out of the lo-
cating slot.
NOTE : DO NOT COMPLETELY REMOVE LIM-
ITER CAP FROM CARBURETTOR!
If the first limiter cap is removed completely, the
second limiter cap can be misaligned while in-
serting the cap removal tool. The cap tabs will be
misaligned with location slots and the centre hole
threads will strip. If centre hole threads strip, use
3 mm diameter thread wood screw to remove the
limiter cap.
3. Remove the limiter cap removal tool from the
limiter cap by turning the tool clockwise, leaving
the limiter cap in place.
4. Screw 2.5 mm limiter cap removal tool
P/N 91019 anticlockwise into centre hole of re-
maining limiter cap until the limiter cap is removed
from the mixture needle completely. Remove the
limiter cap from limiter cap removal tool by turning
clockwise, then screw limiter cap removal tool into
centre hole of previous limiter cap to remove com-
pletely.
5. Turn L and H mixture needle clockwise until
lightly seated, then turn both mixture needles anti-
clockwise for initial setting as follows :
L mixture needle : 2 1/2, H mixture needle : 2 1/4
NOTE : If needles are forced during seating, dam-
age to carburettor may occur.
6. Remove cleaner lid and air filter to see that Idle
adjust screw contacts the throttle plate. Turn Idle
adjust screw anticlockwise and set the screw until
the tip just contacts the throttle plate. Then turn
Idle adjust screw 7/8 turns clockwise. Reinstall air
filter, and cleaner lid.

SERVICE INFORMATION
CS-310ES 9
2-3 Adjusting carburettor
1. Start and warm engine for 1 minute alternat-
ing engine speed between WOT and idle every 5
seconds. Turn H mixture needle anticlockwise until
engine speed drops to approx. 12,500 r/min at
WOT.
NOTE : Do not run engine at high speed without
load longer than 10 seconds, or engine damage
may occur.
2. Adjust L mixture needle using 2.5mm blade
screwdriver to reach maximum engine r/min just
before lean r/min drop off.
3. Set idle speed to 3,700 r/min by turning Idle
adjust screw. Engine speed should be stable
at 3,700 +/- 50 r/min after idle adjust screw
adjustment.
4. Turn L mixture needle anticlockwise reducing engine idle speed 500 r/min to set idle speed at 3,200
r/min. The idle speed range is 3,100 - 3,300 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. Before adjustment, WOT engine speed should be less than or equal to 12,500 r/min. If r/min is higher,
turn H mixture needle anticlockwise until 12,500 r/min is achieved. To make the final WOT engine speed
adjustment, turn the H mixture needle clockwise in 1/8 turn increments with the engine at idle. After each
adjustment, accelerate to WOT, and check r/min. The final r/min should fall within 12,750 - 12,950 r/min.
6. After adjusting carburettor, put new limiter cap
on the other side (c) of limiter cap tool (C) 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 locat-
ing slots (B) in extended housing of carburettor.
IMPORTANT : The limiter caps must be properly installed on L and H mixture needles to comply
with Emission Directive.
7. Start engine, and verify engine idle speed ranges from 2,800 to 3,600 r/min, and WOT engine speed
ranges from 12,000 to 13,000 r/min. Make sure the chain does not rotate when engine is idling. When
final adjustment is completed, the engine should idle, accelerate smoothly, and attain WOT per above
specifications.
NOTE : The initial carburettor settings for Idle adjust screw, Idle and Hi speed mixture needles are intend-
ed to start and run the engine before final carburettor adjustments are made to conform the unit to meet
Emission Directive. The actual number of turns needed for engine operation may vary.
Idle adjust screw
L mixture needle H mixture needle
C
A
B
A
B
c