Echo CS-370ES Service Data

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Echo CS-370ES Service Data | Manualzz

01-36E-00

CS-370ES

1

0

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.

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.

01-36E-00

I S S U E D : 2 0 0 7 0 3

INDEX

2

SERVICE INFORMATION

1 SERVICE INFORMATION

1-1 Specifications

Model

Dimensions Length*

Width

Height

Dry weight*

Engine Type

Rotation

Displacement mm(in) mm(in) mm(in) kg(lb)

Bore

Stroke

Compression ratio

Carburetor Type

Ignition cm 3 (in 3 ) mm(in) mm(in)

Model

Venturi size-Throttle bore mm(in)

Type

Spark plug

Starter

Fuel

Type

Rope diameter x length mm(in)

Type

Mixture ratio

Petrol

Two-stroke air cooled engine oi l

Tank capacity

Type

L (U.S.fl.oz.)

Clutch

Guide bar / Saw chain lubrication type

Oil Tank capacity L (U.S.fl.oz.)

Auto oiler Type

Sprocket Type

Number of teeth

Pitch in

* Without guide bar and saw chain.

** Auto-return choke is on switch bracket.

CS-370ES

CS-370ES

393 (15.5)

245 (9.6)

277 (10.9)

4.6 (10.1)

KIORITZ, air-cooled, two-stroke, single cylinder

Clockwise as viewed from the output end

36.3 (2.22)

38.0 (1.50)

32.0 (1.26)

7.6

Diaphragm horizontal-draught, with auto-return choke**

Walbro WT-820A

13.5 - 15.85 (0.532 - 0.624)

Digital Magneto : CDI system

BPMR8Y

ES (effortless)-start

3.0 x 900 (0.14 x 35.4)

Premixed two-stroke fuel

50 : 1 (2 %)

Minimum 89 octane petrol

ISO-L-EGD (ISO/CD13738), JASO FC

0.41 (13.9)

Centrifugal, 3-shoe slide with 3-tension spring

Automatic with volume adjuster

0.28 (9.5) clutch related type

Spur

6

3/8

Cutting devices

Guide bar Type

Called length

Gauge

Saw chain Type

Number of drive links

Pitch

Gauge cm in in in

30RC50M-3/8

30

0.050

OREGON 91VG

35RC50M-3/8

35

47 53

Low profile 3/8

0.050

CS-370ES SERVICE INFORMATION

1-2 Technical data

Engine

Idling speed

Wide open throttle speed*

Clutch engagement speed

Compression pressure

Ignition system

Spark plug gap

MPa (kgf/cm 2 r/min r/min r/min

) (psi) mm(in)

Minimum secondary voltage at 1000 r/min kV

Secondary coil resistance k Ω

Pole shoe air gaps

Ignition timing at 3000 r/min mm (in)

° BTDC at 8000 r/min at 10,000 r/min

° BTDC

° BTDC

° BTDC at 12,500 r/min

Carburetor

Idle adjust screw initial setting

L mixture needle initial setting turns in** turns back

H mixture needle initial setting

Test Pressure, minimum turns back

MPa (kgf/cm 2 ) (psi)

Metering lever height

Chain oil discharge volume at 7000 r/ min mm(in) mL/min(U.S.fl.oz./min)

2400 - 2900

11500 - 12500

3800 - 4300

1.02 (10.4) (148)

0.6 - 0.7 (0.024 - 0.028)

15

1.5 - 2.2

0.3 - 0.4 (0.012 - 0.016)

10

32

34

32

1 5/8

1 1/4

2 3/8

0.05 (0.5) (7.0)

1.65 (0.06) lower than diaphragm seat

Adjustable : 1.5 - 13 (0.05 - 0.40)

(Factory set 7 mL/min)

BTDC: Before top dead center.

* With 35 cm guide bar and saw chain.

** Set idle speed screw to the point that its tip just contacts throttle plate before initial setting.

3

4

SERVICE INFORMATION CS-370ES

1-3 Torque limits

Descriptions

Starter Starter pawl system

Starter case

Size

M 5

M 5**

Ignition Magneto rotor (Flywheel) M 8 system

Ignition coil M 5

Ignition switch M 14

Fuel system

Spark plug

Carburettor carburetor elbow

Intake bellows

Clutch Clutch hub

Engine Crankcase***

Engine mount

Muffler

Cylinder cover

Others Auto-oiler

Front handle

Rear handle assembly

Handle lid

Brake lever (Hand guard)

Sprocket guard plate

Chain catcher

Guide bar

Regular bolt, nut and screw

M 14

M 5

M 5**

M 5

LM 10

M 5*

M 5

M 5

M 5

M 4

M 5**

M 5

M 4

M 4

M 5**

M 4**

M 4**

M 5

M 8

M 3

M 4

M 5 kgf•cm

40 - 60

25 - 35

250 - 290

40 - 60

15 - 30

150 - 170

30 - 45

20 - 30

30 - 45

300 - 400

70 - 110

70 - 110

80 - 110

25 - 45

20 - 35

45 - 65

30 - 50

35 - 50

10 - 20

10 - 20

45 - 65

10 - 20

45 - 60

200 - 230

6 - 10

15 - 25

25 - 45

N•m

4 - 6

2.5 - 3.5

25 - 29

4 - 6

1.5 - 3

15 - 17

3 - 4.5

2 - 3

3.0 - 4.5

30 - 40

7 - 11

7 - 11

8 - 11

2.5 - 4.5

2.5 - 3.5

4.5 - 6.5

3 - 5

3.5 - 5

1 - 2

1 - 2

4.5 - 6.5

1 - 2

4.5 - 6

20 - 23

0.6 - 1

1.5 - 2.5

2.5 - 4.5

M 6 45 - 75 4.5 - 7.5

LM: Left-hand thread *Apply thread locking sealant (See below) ** Tapping screw

*** The torque differences among four bolts should not exceed 20 kgf•cm (2N•m, 17in•lbf) on crankcase

40 - 55

26 - 45

30 - 45

9 - 17

9 - 17

40 - 55

9 - 17

40 - 52

175 - 200

5 - 9

13 - 22

22 - 40

40 - 65 in•lbf

35 - 50

22 - 30

220 - 250

35 - 50

13 - 26

130 - 150

26 - 40

17 - 26

26 - 40

260 - 350

60 - 95

60 - 95

70 - 95

22 - 40

17 - 30

1-4 Special repairing materials

Material

Adhesive

Liquid gasket

Grease

Location

Ball bearing outer / crankcase

Pulse pipe joint

Cushions

Crankcase seams

Auto-oiler worm

Clutch needle bearing

Handle cushions

Remarks

Loctite #675 or equivalent

Loctite #424, ThreeBond #1741 or equivalent

Loctite #515 or equivalent

Lithium based grease

Rewind spring

Starter center shaft

Chain brake (metal contact part) Molybdenum grease (approx. 1 gram)

CS-370ES

1-5 Service Limits

A B

SERVICE INFORMATION

C D

5

5K275

E

5K277

F

5K278

G

5K279

H

5K280

K

5K016

L

5K042

M

N

5K276

P

5K173 5K174

Description

A Cylinder bore

B Piston outer diameter

C Piston pin bore

D Piston ring groove

E Piston ring side clearance

F Piston pin outer diameter

G Piston ring width

H Piston ring end gap

K Con-rod small end bore

L Crankshaft runout

M Sprocket bore

N Clutch drum bore

P Sprocket wear limit

Min.

Max.

Max.

Max.

Min.

Min.

Max.

Max.

Max.

Max.

Max.

Max.

5K190

1

2

3

4

5K191 mm (in)

When plating is worn and aluminum can be seen

37. 91 (1.493)

9. 075 (0.3573)

1. 6 (0.063)

0. 1 (0.004)

8. 98 (0.3535)

1. 45 (0.057)

0. 5 (0.02)

12. 025 (0.4734)

0. 05 (0.002)

13. 07 (0.5146)

71. 5 (2.81)

0. 5 (0.02)

6

1-6 Special tools

1

6

20

40

60

80

100

120

140

20

180

160

7

SERVICE INFORMATION

2

3 a = 3 mm a = 4 mm

4 a

8

10 11 12

5

CS-370ES

9

1.65

0.4

1.35

1.5

13

14 15

91019

16 17 18

Ign itio n A

#.0

ir G ap

Ga uge

14

= .

35m

P/N

91 m

004

Key Part Number Description Reference

1 990511-30017 Tachometer PET-1000 Measuring engine speed

2 895612-79920 L-hex wrench (3 mm)

3 895610-79920 L-hex wrench (4 mm)

Removing and installing hex. socket bolts (M4)

Removing and installing hex. socket bolts (M5)

4 897501-03938 Puller

5 897505-16133 Clutch tool

6 91007 Compression gauge

7 897702-30131 Piston pin tool

Removing magneto rotor

Removing and assembling clutch assembly

Measuring cylinder compression

Removing and installing piston pin

8 897701-06030 Bearing wedge

9 897563-19830 Metering lever gauge

10 897708-19835 Worm puller

11 Y089-000010 Worm inserter

12 897726-09130 Oil seal tool

13 897800-79931 Spark tester

14 897803-30133 Pressure tester

15 91019 Limiter cap tool

Removing and crankshaft ball bearings

Measuring metering lever height on carburetor

Removing auto-oiler worm

Installing auto-oiler worm : Crankshaft thread LM8x1.25

Installing oil seals

Checking ignition system

Testing carburettor and crankcase leakage

Removing and installing limiter cap

16 500-500 Welch plug tool

17 990610-00051 Loctite #515

18 91004

Removing and installing welch plug tool

Applying crankcase seam

Module air gap gauge Adjusting pole shoe air gaps

CS-370ES SERVICE INFORMATION

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” 2stroke oil.

6. The recommended bar and chain must be installed, and properly tensioned.

NOTE : In order to achieve proper carburettor adjustment, 30 or 35 cm bar and chain should be installed on the unit. Otherwise serious engine damage will occur due to overspeeding.

B. Set L and H mixture needles full anticlockwise. Start and run engine for two minutes alternating engine speed between WOT for 5 seconds and idle for 5 seconds. Adjust idle speed screw to 2,700 +/- 150 r/min.

Adjust H mixture needle to 12,000 +/- 500 r/min. 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.

7

2-2 Presetting idle adjust screw, L mixture needle and H mixture needle

Parts Required : (2) P/N P003-000010 limiter caps.

1. Turn the L and H mixture needles anticlockwise to rich side stop to align limiter cap tab (A) with locating slot (B), using 3 mm blade screwdriver.

NOTE : If cap tabs (A) misalign with locating slots

(B), there is a chance to strip thread.

H

L

A

B

A

B

(continued)

8

SERVICE INFORMATION

2-2 Presetting idle adjust screw, L mixture needle and H mixture needle (continued)

CS-370ES

2. Screw threaded end of limiter cap removal tool

91019 with 2.5 mm left-hand thread into center hole of limiter cap anticlockwise until tab of the limiter cap just comes out of the locating slot.

NOTE : DO NOT COMPLETELY REMOVE LIMITER

CAP FROM CARBURETTOR!

If the limiter cap was 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 removal tool into center hole of the limiter cap. As a result, the thread of the limiter cap would be stripped. Use 3 mm diameter thread wood screw to remove the stripped 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 threaded end of limiter cap removal tool

91019 into center hole of the other limiter cap anticlockwise until the limiter cap is removed from the mixture needle completely. Remove the limiter cap from limiter cap removal tool turning clockwise, and screw thread of limiter cap removal tool 91019 into center hole of previous limiter cap to pull out completely.

5. Turn L and H mixture needles clockwise until lightly seated, and then turn out both mixture needles following turns.

L mixture needle : 1 1/4, H mixture needle : 2 3/8

NOTE : If needles are forced during seating, damage to carburettor may occur.

6. Remove air filter cover 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 1 5/8 turns clockwise. Reinstall air filter, and air filter cover.

CS-370ES SERVICE INFORMATION

2-3 Adjusting carburettor

Idle adjust screw

1. Start engine and warm it up at idle for one minute.

Turn H mixture needle anticlockwise until engine speed drops to approx. 11,000 r/min.

2. Warm it up well for 100 sec alternating engine speed between WOT (Wide Open Throttle) for 5 seconds and idle for 5 seconds .

NOTE : Do not run engine at high speed without load longer than 5 seconds, or engine damage may occur.

3. Adjust L mixture needle with 3 mm blade screwdriver to reach maximum engine speed just before lean drop off.

L mixture needle H mixture needle

4. Set idle engine speed to 3,800 r/min by turning idle adjust screw. Engine speed should be stable at

3,800 +/- 50 r/min after idle adjust screw adjustment.

5. Turn L mixture needle anticlockwise reducing engine idle speed 1,200 r/min to set idle speed at 2,600 r/min. The engine idle speed range is 2,500 - 2,800 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.

6. Make sure WOT engine speed is approx. 11,000 r/min. If WOT engine speed is over 11,000 r/min, turn

H mixture needle anticlockwise until engine speed drops to approx. 11,000 r/min. Turn H mixture needle

1/8 turn increments clockwise at idle engine speed, then squeeze throttle trigger and check WOT engine speed. If the WOT engine speed is less than 11,500 r/min, turn H mixture needle 1/8 turn clockwise again, and check WOT engine speed. The final WOT engine speed should fall within the11,700 to 12,300 r/min range.

7. After adjusting carburettor, screw new limiter cap on the thread of the limiter cap removal tool 91019

(C) anticlockwise approx. 2 turns as shown, and put the limiter caps on L and H mixture needles respectively. And then press the caps on L and H mixture needles with opposite side of the limiter cap tool (C).

C

NOTE : Align the limiter cap’s tabs (A) with locating slots (B) in extended housing of carburettor.

B H

L

A

9

A B

IMPORTANT : The limiter caps must be installed L and H mixture needles to comply with Emission

Directive.

8. Start engine, and verify engine idle speed ranges from 2,400 to 2,900 r/min, and WOT engine speed ranges from 11,500 to 12,500 r/min. Make sure chain does not rotate when engine is idling. When final adjustment is completed, the engine should idle, accelerate smoothly, and attain WOT per above specification.

NOTE : Initial carburettor setting (idle adjust screw, L and H mixture needles) shown on page 3 and 8 is to start the engine after restoration or carburettor change. Idle adjust screw, L and H mixture 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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