Echo SRM-5000 Istruzioni per il montaggio

SRM-500010-52D-02 1

lNTRODUCTION

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. 402-25

(Model : SRM-4000, RM-4000) contains lots

of information for servicing this model.

NOTE : SRM-5000 serial number 36000001 to

36007482. Refer to Service Data 10-52C-01.

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 EMISSION ADJUSTMENT GUIDE ...............7

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

2-2 Idle adjust screw, idle mixture needle and

H mixture needle initial settings..................7

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

Reference No. 10-52D-02

REVISED: 200609

INDEX ISSUED: 200510

SERVICE INFORMATION SRM-5000

1 SERVICE INFORMATION

1-1 Specifications

Model SRM-5000(L) SRM-5000(U)

Dimensions Length* mm(in) 1860 (73.2) 1860 (73.2)

Width mm(in) 325 (12.8) 700 (27.6)

Height mm(in) 265 (10.4) 430 (16.9)

Dry weight** kg(lb) 8.3 (18.30) 8.7 (19.18)

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

Semi-automatic decompression

Rotation Anticlockwise as viewed from the output end

Displacement cm3(in3) 51.7 (3.155)

Bore mm(in) 44.0 (1.732)

Stroke mm(in) 34.0 (1.339)

Compression ratio 6.9 : 1

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

Model Walbro WYK-227

Venturi size-Throttle bore mm(in) 13.5 - 15.0 (0.531 - 0.591)

Metering diaphragm pressure Lead pressure from inside of cleaner case

Ignition Type CDI (Capacitor discharge ignition) system in a single integrated

piece, with electronic timing advancer and speed governer

Spark plug RCJ-6Y

Starter Type Automatic rewind

Rope diameter x length mm(in) 3.8 x 1150 (0.15 x 45.3)

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.) 1.0 (33.8)

Clutch Type Centrifugal, 2 - shoe pivot

Handle Type Front Crescent loop w/cushion grip U-shaped

Rear Integrated control grip w/cushion - - -

Drive shaft Type Solid (Spline shaft)

Diameter - Length mm(in) 8 - 1590 (0.31 - 62.6)

Housing OD -ID mm(in) 28 - 24 (1.10 -0.94)

(Main pipe) Length mm(in) 1530 (60.2)

Gear case Reduction ratio 1.33

Gear tooth Spiral bevel gear

Lubrication Lithium based grease

Cutter Type Nylon line cutter, 3-tooth blade†, Others

Pilot diameter mm(in) 25.4 (1.0)

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

Cutting rotation Anticlockwise as viewed from top

OD: Outer diameter. ID: Inner diameter.

* Without shoulder harness and cutter head. ** With standard cutter head, without shoulder harness.

† Install and use U-shaped handle when operating with steel blade.

††Primer is on cleaner case.

SERVICE INFORMATIONSRM-5000 3

1-2 Technical data

Engine

Idling speed r/min 2000 - 2700

Operating speed r/min 7500 - 8500

Wide open throttle speed r/min 9700 - 10300 †1 10500 - 12000 †2

Clutch engagement speed r/min 3400 - 3900

Compression pressure MPa (kgf/cm2) (psi) 0.93 (9.5) (135)

Ignition system

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

Minimum secondary voltage at 1000 r/min kV 14.0

Secondary coil resistance k 2.0 - 2.8

Pole shoe air gaps mm(in) 0.30 - 0.40 (0.012 - 0.016)

Ignition timing at 1000 r/min °BTDC 28

at 3000 r/min °BTDC 35

at 7000 r/min °BTDC 40

at 10000 r/min °BTDC 33

Carburettor

Idle adjust screw initial setting turn in* 3 3/4

Idle mixture needle initial setting turn in** 13 1/2

Hmixture needle initial setting turn back 4

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

Metering lever height mm(in) 1.5 (0.06) lower than diaphragm seat

BTDC: Before top dead center.

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

** Screw in idle mixture needle from initial thread engagement (at the point that the clicking sound is heard).

†1 With two line nylon line head. †2With metal blade.

SERVICE INFORMATION SRM-5000

1-3 Torque limits

Descriptions Size kgf•cm N•m in•lbf

Starter Pawl carrier M 8 80 - 100 8 - 10 70 - 90

system Pawl carrier nut M 8 160 - 200 16 - 20 140 - 175

Starter case M 5* 35 - 50 3.5 - 5 30 - 45

Ignition Magneto rotor (Flywheel) M 10 200 - 240 20 - 24 175 - 210

system Ignition coil M 5 60 - 100 6 - 10 50 - 90

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

Fan cover M 5 70 - 110 7 - 11 60 - 95

Fuel Carburettor insulator M 5 40 - 55 4 - 5.5 35 - 50

system Carburettor M 5 30 - 45 3 - 4.5 26 - 40

Fuel tank bracket M 5 70 - 110 7 - 11 60 - 95

Fuel tank M 5* 50 - 90 5 - 9 45 - 80

Clutch Clutch shoe M 8 160 - 200 16 - 20 140 - 175

Engine Crankcase M 5** 70 - 110 7 - 11 60 - 95

Cylinder M 5** 70 - 110 7 - 11 60 - 95

Decompression valve M 8 80 - 100 8 - 10 70 - 90

Top guard M 5* 30 - 45 3 - 4.5 26 - 40

Muffler M 6 110 - 150 11 - 15 95 - 130

Muffler cover M 5* 30 - 45 3 - 4.5 26 - 40

Muffler stay M 5 70 - 110 7 - 11 60 - 95

Others Blade fastening nut LM 10 280 - 320 28 - 32 245 - 280

Regular bolt, nut and screw M3 6 - 10 0.6 - 1 5 - 9

M4 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

LM: Left hand thread. * Apply thread locking sealant. (See below)

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

crankcase.

1-4 Special repairing materials

Material Location Remarks

Grease Gear case

Rewind spring Lithium based grease or ECHO LUBETM

Starter center post

Oil Oil seal inner lips Two-stroke engine oil or engine oil (SAE#30)

Drive shaft

Thread locking sealant Starter case

Muffler cover Loctite #242, ThreeBond #1324 or equivalent

Fuel tank

Top guard

SERVICE INFORMATIONSRM-5000 5

5K223 5K224

5K225 5K016 5K042

5K222

12345678910 11

5K245

5K246

1-5 Service limits

ABCD

EFGH

KLM

Description mm (in)

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

B Piston outer diameter Min. 43.88 (1.728)

C Piston pin bore Max. 10.115 (0.3982)

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. 9.95 (0.392)

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. 14.025 (0.552)

L Crankshaft runout Max. 0.05 (0.002)

M Clutch drum bore Max. 79.5 (3.13)

SERVICE INFORMATION SRM-5000

1.5

1.65

1.3

0.4

120

140

160

180

100

ECHO

Key Part Number Description Used for:

1 897801-33330 Tachometer PET-1000 Measuring engine speed to adjust carburettor

2 895610-79920 L-hex wrench (4 mm) Removing and installing hex. socket bolt (M5)

3 895611-79920 L-hex wrench (5 mm) Removing and installing hex. socket bolt (M6)

4 897501-03938 Puller Removing flywheel

5 897537-30130 Piston stopper Locking crankshaft rotation

6 897563-19830 Metering lever gauge Measuring metering lever height on carburettor

7 897603-23030 PTO shaft puller Removing PTO shaft

8 897701-02830 Bearing wedge Removing ball bearing remaining on crankshaft

9 897701-06030 Bearing wedge Removing ball bearing on PTO shaft / drive gear

10 897701-14732 Bearing tool Removing and installing ball bearings on crankcase / clutch drum

11 897702-30131 Piston pin tool Removing and installing piston pin (Use 10mm dia. adapter)

12 897712-04630 2-pin wrench Removing and installing pawl carrier

13 897714-12330 Oil seal tool Installing crankcase oil seal (clutch side)

14 897714-24330 Oil seal tool Installing crankcase oil seal (starter side) / PTO shaft bearings

15 897726-21430 Oil seal tool Installing crankcase oil seal (clutch side)

16 897718-03930 Bearing tool Installing crankcase oil seal (starter side)

17 897719-02830 Piston holder Making piston steady to remove and install piston / ring

18 363018-00310 Washer Installing crankcase oil seal (starter side)

19 897800-79931 Spark tester Checking ignition system

20 897803-30132 Pressure tester Testing fuel pipes/tank and crankcase leakages

21 897826-16131 Pressure plug Plugging intake port to test crankcase / cylinder sealing

22 897827-16131 Pressure plate Plugging intake port to test crankcase / cylinder sealing

23 897831-16131 Pressure plug Plugging exhaust port to test crankcase / cylinder sealing

24 897835-16131 Pressure connector Testing crankcase and cylinder leakages

25 91007 Compression guage Measuring cylinder compression

26 91020 Limiter plug tool Removing and installing limiter plug

1-6 Special tools

8: a = 80 mm

9: a = 70 mm

21 23

2: a=4mm

3: a=5mm

14: a = 12 mm

b = 32 mm

15:a= 15 mm

b = 24.5mm

SERVICE INFORMATIONSRM-5000 7

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

B. Start and run engine for 1 minute at idle speed, and then for 2 minutes alternating engine speed between

WOT for 20 seconds and idle for 10 seconds. Adjust idle speed screw to 2,500 +/- 100 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 plug(s) must

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

2-2 Idle adjust screw, idle mixture needle and H mixture needle initial settings

1. Remove the plugs from idle mixture needle hole

(A) and H 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)Screw limiter plug tool counterclockwise 2 turns

into limiter plug while pushing the tool.

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

mixture needle hole.

(4)Repeat plug removal procedure for the other

mixture needle.

NOTE : When plug is damaged and left in the hole,

use needle or pin-shaped tool to scrape.

2. Turn idle adjust screw (D) anticlockwise until its

tip just toes throttle plate (E). Then turn it in clockwise

3 3/4 turns.

3. Turn idle mixture needle (C) anticlockwise to fully

come out until clicking sound is heard. Then turn it

clockwise 13 1/2 turns.

Turn H mixture needle (F) clockwise until lightly

seated. Then turn it anticlockwise 4 turns.

(B)

(A)

(D) (E)

(C)

(F)

(C)

SERVICE INFORMATION SRM-5000

2-3 Adjusting carburettor

1. Start engine and warm it up well as follows.

(1) Warm engine up for approx. 1 minute at idle

speed.

(2) Warm it up alternating engine speed between

half-throttle speed (Partial speed approx. 6,000

r/min with nylon line head, 7,000 r/min with metal

blade) and idle speed every 2 seconds for 2 minutes.

(3) Turn H mixture needle anticlockwise until engine

speed drops to approx. 9,000 r/min (When using

metal blade : 9,500 r/min) at WOT.

(4) Warm it up alternating 3 times of engine speed

between WOT for 1 minute and idling for 10 seconds.

2. Verify idle engine speed and adjust idle speed as

follows.

(1) Verify idle engine speed. When the speed is in

the range of 2,300 to 2,600 r/min, proceed to step 3.

(2) If the speed is not in this range, adjust idle mixture

needle (C) to reach maximum idle speed with 2.5

mm blade screw driver.

(3) Set idle speed to the range of 3,300 to 3,500

r/min by turning idle adjust screw (D).

(4) Turn idle mixture needle (C) anticlockwise to

reduce idle speed 900 to 1,000 r/min in the range of

2,300 to 2,600 r/min.

NOTE : Engine speed must be allowed to stabilize

minimum of 20 seconds after each adjustment to

assure accurate tachometer readings.

3. Adjust WOT engine speed as follows.

(1) Before adjusting carburettor, WOT engine speed

should be less than or equal to 9,000 r/min (When

using metal blade : 9,500 r/min). If engine speed is

higher than 9,000 r/min (When using metal blade :

9,500 r/min), turn H mixture needle (F) anticlockwise

at WOT to reduce the engine speed.

(2) Turn H mixture needle clockwise to obtain 9,900

to 10,100 r/min at WOT (When using metal blade :

10,800 - 11,200 r/min).

(3) Run engine alternating 4 times of engine speed

between WOT for 30 seconds and idling 5 seconds.

Then confirm WOT engine speed if in the range of

9,900 to 10,200 r/min (When using metal blade :

10,500 - 11,500 r/min). When engine dose not run

in this range, adjust H mixture needle again until

engine runs within 9,800 - 10,200 r/min (When using

metal blade : 10,500 - 11,500 r/min).

(C)

(D)

(F)

SERVICE INFORMATIONSRM-5000 9

(G)

ECHO

4. Start engine again, and verify engine idle speed

ranges from 2,000 to 2,700 r/min, and WOT engine

speed ranges from 9,700 to 10,300 r/min (When

using metal blade : 10,500 - 12,000 r/min). Make

sure the cutting device does not rotate when engine

is idling. When final adjustment is completed, the

engine should idle, accelerate smoothly, and attain

WOT per above specification.

5. After adjusting carburettor, put new limiter plug

on the non thread side of limiter plug tool #91020

(G) as shown, and install new limiter plugs in idle

mixture needle hole and H mixture needle hole.

IMPORTANT : The limiter plugs must be installed

idle and H mixture needle holes to comply with

Emission Directive.

NOTE : Initial carburettor setting (Idle adjust screw,

idle and H mixture needles) shown here is to start

the engine after restoration or carburettor change.

Idle adjust screw, idle 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, the variance

would be ignorable.

IMPORTANT : When the power is down while

operating unit, the user must clean air filter.

2-3 Adjusting carburettor(continued)

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