Echo GT-220ES Istruzioni per il montaggio

GT-220ES, SRM-220ES

10-21P-02 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

products information available at the time of

publication.

SERVICE DATA

TRIMMER/BRUSHCUTTER

GT-220ES

SRM-220ES

(Serial nember : 36000001 and after)

STAGE MODEL

(Serial nember : 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 ...

2-1 General adjusting rules............................... 7

2-2 Initial Idle adjust screw, Idle mixture

needle

and Hi speed mixture needle settings ................... 7

2-3 Adjusting carburettor................................... 8

Reference No. 10-21P-02

REVISED: 200901

ISSUED: 200705

INDEX

SERVICE INFORMATION

GT-220ES

SRM-220ES

1 SERVICE INFORMATION

1-1 Speciﬁcations

Model GT-220ES

SRM-220ES (L) SRM-220ES (U)

Dimensions Length* mm(in) 1460 (57.4) 1760 (69.3)

Width mm(in) 320 (12.6) 345 (13.5) 655 (25.7)

Height mm(in) 575 (22.6) 320 (12.6) 420 (16.5)

Dry weight* kg(lb) 4.4 (9.7) 5.0 (11.1) 5.1 (11.2)

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

Rotation Anticlockwise as viewed from the output end

Displacement cm3(in3) 21.2 (1.294)

Bore mm(in) 32.2 (1.268)

Stroke mm(in) 26.0 (1.024)

Compression ratio 5.9

Carburettor Type Rotary valve type: Diaphragm, horizontal-draught, with primer

Model ZAMA RB-K93

Venturi size-Throttle bore mm(in) 9.0 - 10.5 (0.35 - 0.41)

Ignition Type CDI (Capacitor discharge ignition) system

Variable Slope Timing (VST) : Slope advance ignition

system combined with electronic speed governor

Spark plug BPMR8Y

Exhaust Mufﬂer type 36 series : Spark arrestor mufﬂer

37 series : Spark arrestor mufﬂer with catalyst

Starter Type ES (effortless-start)

Rope diameter x length mm(in) 3.0 x 820 (0.12 x 32.2)

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/FD

Tank capacity L (U.S.ﬂ.oz.) 0.4 (13.5)

Clutch Type Centrifugal, 2 - shoe slide

Handle Type Front D-loop U-handle with

Rear

Integrated control grip with cushion integrated control grip

Drive shaft Type Flexible

Diameter - Length mm(in) 6.0 - 1330 (0.24 - 52.4) 6.0 - 1520 (0.24 - 59.8)

Housing OD -ID mm(in) 25 - 22 (0.98 - 0.87)

(Main pipe) Length mm(in)

1330 (52.4) 1500 (59.1)

Gear case Reduction ratio --- 1.36

Gear tooth --- Spiral bevel gear

Lubrication Lithium based grease

Cutter Type Nylon line head Metal blade

Fastener type, size mm Standard thread Left-hand thread nut, M10 x 1.25 pitch

3/8 inch - 24UNF

Cutting rotation Clockwise as viewed Anticlockwise as viewed from top

from top

OD: Outer diameter. ID: Inner diameter.

* Without shoulder harness and cutter head.

SERVICE INFORMATION

GT-220ES

SRM-220ES 3

1-2 Technical data

Model GT-220ES SRM-220ES (L) SRM-220ES (U)

Engine

Idling speed r/min 2600 - 3400

Wide open throttle speed r/min 7000 - 8000* 8000 - 9700* 9500 - 11500**

Clutch engagement speed r/min 3500 - 4100

Compression pressure MPa (kgf/cm2) (psi) 0.74 (7.6) (108)

Ignition system

Spark plug gap mm(in) 0.6 - 0.7 (0.024 - 0.028)

Minimum secondary voltage at 1500 r/min kV 15

Primary coil resistance Ω130 - 200

Secondary coil resistance kΩ1.0 - 2.0

Pole shoe air gaps mm(in) 0.3 - 0.4 (0.012 - 0.016)

Ignition timing at 3000 r/min °BTDC 27

at 8000 r/min °BTDC 42

Carburettor

Venturi Size mm(in) 9.0 (0.354)

Throttle Bore mm(in) 10.5 (0.413)

Idle adjust screw initial setting turn in*** 1 1/2 2 1/2

Idle mixture needle initial setting turn back† 2 3/4

Hi speed mixture needle initial setting turns back† 1 3/8

Test pressure, minimum MPa (kgf/cm2) (psi) 0.05 (0.5) (7.0)

Metering lever height mm(in) 0.1-0.25 (0.004-0.010) lower than diaphragm seat

BTDC: Before top dead centre.

* With two line nylon line head.

** With metal blade.

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

† Turn Idle/Hi speed mixture needles anticlockwise from point that needle is lightly seated.

SERVICE INFORMATION

GT-220ES

SRM-220ES

1-3 Torque limits

Descriptions Size kgf•cm N•m in•lbf

Starter Starter case M 4 14 - 28 1.4 - 2.8 12 - 24

system

Ignition Ignition coil M 4 30 - 50 3 - 5 26 - 45

system Fan cover M 4** 14 - 28 1.4 - 2.8 12 - 24

Spark plug M 14 150 - 170 15 - 17 130 - 150

Ground lead terminal M 4** 20 - 40 2 - 4 18 - 35

Fuel Intake insulator M 5** 25 - 40 2.5 - 4 22 - 35

system Carburettor M 5 30 - 40 3 - 4 26 - 35

Throttle cable nut M 6 25 - 35 2.5 - 3.5 22 - 30

Fuel tank M 5** 30 - 45 3.0 - 4.5 26 - 40

Clutch Clutch hub M 8 120 - 160 12 - 16 100 - 140

Engine Crankcase M 5†70 - 100 7 - 10 60 - 90

Cylinder M 5†70 - 100 7 - 10 60 - 90

Cylinder cover M 4 14 - 28 1.4 - 2.8 12 - 24

Mufﬂer M 5 60 - 100 6 - 10 52 - 85

Top guard M 5* 15 - 25 1.5 - 2.5 13 - 22

Others Trigger holder assembly M 5 35 - 55 3.3 - 5.5 30 - 48

Trigger holder assembly band M 5 20 - 40 2 - 4 18 - 35

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

M 8 110 - 150 11 - 15 95 - 130

M 10 210 - 300 21 - 30 180 - 260

*Tapping screw ** Apply thread locking sealant. (See below)

† The torque differences among bolts should not exceed 20 kgf•cm (2N•m, 17in•lbf) on one cylinder or

crankcase.

1-4 Special repairing materials

Material Location Remarks

Thread locking sealant Fan cover

Intake insulator

Ground lead terminal

ThreeBond 1342 or equivalent

Fuel tank

Grease Gear case

Rewind spring Lithium based grease

Starter center post

SERVICE INFORMATION

GT-220ES

SRM-220ES 5

Description mm (in)

A Cylinder bore When plating is worn and aluminium can be seen

B Piston outer diameter Min. 32.10 (1.264)

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. 7.970 (0.3138)

G Piston ring width Min. 1.45 (0.057)

H Piston ring end gap Max. 0.5 (0.02)

K Crankshaft runout Max. 0.03 (0.001)

L Clutch drum bore Max. 51.5 (2.03)

5K016 5K042

5K171

5K228A 5K229A 5K230

5K231A

12345678910 11

5K071A

5K268

5K269

1-5 Service limits

ABCD

EFGH

SERVICE INFORMATION

GT-220ES

SRM-220ES

Ignition Air Gap Gauge

#.014 = .35mm

P/N 91004

ECHO

0.4

0.8

1.2

MPa

Key Part Number Description Used for:

1 897801-33330 Tachometer PET-1000 Measuring engine speed

2 363018-00310 Washer Installing crankcase oil seal of starter side

3 895610-79920 L-hex wrench (4 mm) Removing and installing hex. socket bolts (M5)

4 897603-23030 PTO shaft puller Removing driven (PTO) shaft

5 897701-06030 Bearing wedge Removing ball bearings on crankshaft

6 897701-14732 Bearing tool Removing and installing crankcase ball bearings

7 897702-30131 Piston pin tool Removing and installing piston pin (Use 8 mm dia. adapter.)

8 897705-11520 Bearing tool Removing and installing con-rod small end needle bearing

9 897712-04630 2-pin wrench Removing and installing pawl carrier

10 897726-09130 Oil seal tool Installing crankcase oil seals

11 897800-79931 Spark tester Checking ignition system

12 897803-30131 Pressure tester Checking carburettor and crankcase leakages

13 897835-16131 Pressure connector Checking crankcase and cylinder leakages

14 433019-12330 Flange nut Removing magneto rotor (ﬂywheel)

15 900100-08008 Bolt Removing magneto rotor (ﬂywheel)

16 91020 Limiter plug tool Removing and installing plug

17 91037 Compression gauge Measuring cylinder compression

18 91004 Module air gap gauge Adjusting pole shoe air gaps

1-6 Special tools

912

15 18

SERVICE INFORMATION

GT-220ES

SRM-220ES 7

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. Two nylon line head with properly cut lines is recommended to be installed for proper engine loading.

Start and run engine for 3 minutes alternating engine speed between WOT for 10 seconds and idle for

5 seconds. Adjust idle speed screw to 3,000 +/- 100 r/min. If engine does not run correctly after this adjust-

ment, proceed to the next step 2-2.

IMPORTANT : After adjusting carburettor according to the steps 2-2 and 2-3, the limiter plug(s) must

be installed in Idle and Hi speed mixture needle(s) hole(s) to comply with Emission Directive.

2-2 Initial Idle adjust screw, Idle mixture needle and Hi speed mixture needle settings

Parts Required : (2) limiter plug P/N P005-001270

1. Remove plugs from Idle mixture needle hole (A)

and Hi speed mixture needle hole (B) using limiter

plug tool (C) as follows.

1) Put limiter plug tool (C) on limiter plug in mixture

needle hole.

2) Turn limiter plug tool anticlockwise 2 turns slow-

ly into limiter plug while pushing the tool.

3) Pull out limiter plug tool with the limiter plug from

mixture needle hole.

NOTE : If plug is damaged and stays in the hole,

use hand auger or pin-shaped tool to scrape and

lift the plug pieces out of the hole.

Turn Idle mixture needle (D) clockwise completely until lightly seated.

Then turn it anticlockwise 2 3/4

turns. Turn Hi speed mixture needle (G) clockwise until lightly seated. Then turn it anticlockwise 1 3/8 turn.

3. Turn Idle adjust screw (E) anticlockwise until screw tip just touches throttle plate (F). Then turn it in

clockwise 1 1/2 (GT-220ES), 2 1/2 (SRM-220ES) turns.

NOTE : Initial carburettor setting (Idle adjust screw, Idle and Hi speed mixture needles) shown here is to

start the engine after restoration or carburettor change. Idle adjust screw, Idle and Hi speed mixture nee-

dles turn for designated engine revolution through procedures indicated here may vary. As long as idle

and WOT engine speed is set in given range, the variance would be ignorable.

(A)

(B)

(G)

(A)

(E)

(F)

(D)

(C)

1) 2) 3)

(E)

SERVICE INFORMATION

GT-220ES

SRM-220ES

2-3 Adjusting carburettor

1. Start and warm up engine alternating engine

speed between WOT for 10 seconds and idle for 5

seconds for 3 minute.

NOTE : If the engine can’t start, turn Idle mixture

needle clockwise in 1/4 turn increments until the

engine starts.

2. Adjust Idle mixture needle to reach maximum

idle speed with 2.5 mm blade screwdriver.

3. Set idle speed to 3,800 r/min by turning Idle ad-

just screw. Engine speed should be stable at 3,800

+/- 50 r/min.

4. Turn Idle mixture needle anticlockwise to re-

duce engine idle speed 800 r/min to set idle speed

at 3,000 r/min. The idle speed range is 2,900 - 3,100

r/min.

NOTE : Engine speed must be allowed to stabilize

a minimum of 20 seconds after each adjustment of

idle mixture needle to assure accurate tachometer

readings.

5. Adjust Hi speed mixture needle to reach maxi-

mum WOT engine speed.(maximum approximate

7,300 r/min on GT-220ES, 8,800 r/min on SRM-

220ES with nylon line head, 10,500 r/min on SRM-

220ES with metal blade.) Then turn Hi speed

mixture needle anticlockwise to reduce WOT en-

gine speed 20 r/min.

6. Start engine again and verify engine idle speed

ranges from 2,600 to 3,400 r/min, and WOT en-

gine speed ranges from 7,000 r/min to 8000 r/min

on GT-220ES, 8,000 r/min to 9,700 r/min on SRM-

220ES with nylon line head, 9,500 r/min to 11,500

r/min on SRM-220ES with metal blade. Make sure

the cutter does not rotate when engine is idling.

When final adjustment is completed, the engine

should idle, accelerate smoothly, and attain WOT

per above speciﬁcations.

7. After adjusting carburettor, completely insert and

secure new plug (s) (J) P005-001270 deep in the

needle holes per the Emission directive using lim-

iter plug tool (H).

NOTE : Engine WOT, and idle engine speed in

field operation may vary from final adjustment

speciﬁcations due to changing ambient conditions,

fuel, and engine loads. Safe engine speed vari-

ances should be within the WOT and Idle speed

ranges listed in Section 1-1, otherwise the carbure-

tor should be readjusted.

(J)

(H)

(J)

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