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SRM5000 ENG .pdf


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1

SRM-5000

10-52A-00

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
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 ........................ 4
1-5 Service limits .............................................. 5
1-6 Special tools ............................................... 6

Reference No. 10-52A-00

ISSUED:

INDEX

200201

2

SERVICE INFORMATION

SRM-5000

1 SERVICE INFORMATION
1-1 Specifications
Model
Dimensions Length*
Width
Height
Dry weight **
Engine

mm(in)
mm(in)

SRM-5000(L)
1860 (73.2)
325 (12.8)

SRM-5000(U)
1860 (73.2)
700 (27.6)

mm(in)

265 (10.4)

430 (16.9)

8.3 (18.30)

8.7 (19.18)

kg(lb)
Type

KIORITZ, air-cooled, two-stroke, single cylinder
Semi-automatic decompression

Rotation
Displacement

3

3

cm (in )

Bore

mm(in)

44.0 (1.732)

Stroke

mm(in)

34.0 (1.339)

Compression ratio
Carburettor Type

6.6 : 1
Diaphragm, horizontal-draught, with primer

Model

Walbro WYK-158

Ignition

Venturi size-Throttle bore mm(in)
Type

Starter

Spark plug
Type

Fuel

Rope diameter x length
Type

Clutch
Handle

Tank capacity
Type
Type

Drive shaft

Type

Gear case

Cutter

Counterclockwise as viewed from the output end
51.7 (3.155)

13.5 - 15.0 (0.531 - 0.591)
CDI (Capacitor discharge ignition) system
in a single integrated piece, with electronic timing advancer
RCJ-6Y
Automatic rewind

mm(in)

L (U.S.fl.oz.)

Diameter - Length
Housing
OD -ID
(Main pipe)
Length
Reduction ratio
Gear tooth
Lubrication
Type
Pilot diameter
Fastener type, size
Cutting rotation

Front

3.8 x 1150 (0.15 x 45.3)
Premixed two-stroke fuel (Refer to Operator’s manual.)
1.0 (33.8)
Centrifugal, 2 - shoe pivot
Crescent loop w/cushion grip
U-shaped

Rear Integrated control grip w/cushion
Solid
mm(in)
mm(in)
mm(in)

mm(in)
mm

---

8 - 1590 (0.31 - 62.6)
28 - 24 (1.10 -0.94)
1530 (60.2)
1.33
Spiral bevel gear
Lithium based grease
Nylon line cutter, 3-tooth blade†, Others
25.4 (1.0)
Left-hand thread nut, M10 x 1.25 pitch
Counterclockwise 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.

SRM-5000

3

SERVICE INFORMATION

1-2 Technical data
Engine
Idling speed

r/min

2000 - 2700

Operating speed
Clutch - in speed

r/min
r/min

6000 - 8000
3400 - 3900

Compression pressure
Ignition system
Spark plug gap

MPa (kgf/cm2 ) (psi)

0.90 (9.0) (130)

mm (in)

Minimum secondary voltage at 1000 r/min

0.6 - 0.7 (0.024 - 0.028)

kV

14.0

Secondary coil resistance
Pole shoe air gaps

k1
mm(in)

2.0 - 2.8
0.30 - 0.40 (0.012 - 0.016)

Ignition timing

at 1000 r/min
at 7000 r/min

°BTDC
°BTDC

17.5
30

at 11000 r/min

°BTDC

11.5

Carburettor
Main jet

#53

Idle speed screw initial setting
turn in*
Idle needle initial setting
turns back
Test Pressure, minimum
MPa (kgf/cm2) (psi)
Metering lever height

mm (in)

5
1
0.05 (0.5) (7.0)
1.5 (0.06) lower than diaphragm seat

BTDC: Before top dead center.
* Set idle speed screw to contact throttle plate before initial setting.

4

SERVICE INFORMATION

SRM-5000

1-3 Torque limits
Descriptions

Size

kgf•cm

N•m

in•lbf

Starter Pawl carrier
system Pawl carrier nut
Starter case

M8

80 - 100

8 - 10

70 - 90

M8
M 5*

200 - 240
35 - 50

20 - 24
3.5 - 5.0

175 - 210
30 - 45

Ignition Magneto rotor (Flywheel)
system Ignition coil
Spark plug

M 10

200 - 240

20 - 24

175 - 210

M5
M 14

60 - 100
150 - 170

6 - 10
15 - 17

50 - 90
130 - 150

M5

70 - 110

7 - 11

60 - 95

Fuel
Carburettor insulator
system Carburettor
Fuel tank bracket

M5

40 - 55

4.0 - 5.5

35 - 50

M5
M 5*

30 - 45
50 - 90

3.0 - 4.5
5.0 - 9.0

26 - 40
45 - 80

Clutch

M8

160 - 200

16 - 20

140 - 175

M5

70 - 110

7 - 11

60 - 95

Fan cover

Clutch shoe

Engine Crankcase
Cylinder
Decompression valve
Top guard
Muffler

M5
M8
M 5*
M6

Muffler cover
Muffler stay

M5
M5

30 - 45
70 - 110

3.0 - 4.5
7 - 11

26 - 40
60 - 95

LM 10
M3

280 - 320
6 - 10

28 - 32
0.6 - 1.0

245 - 280
5- 9

M4
M5

15 - 25
25 - 45

1.5 - 2.5
2.5 - 4.5

13 - 22
22 - 40

M6
M8
M 10

45 - 75
110 - 150
210 - 300

4.5 - 7.5
11 - 15
21 - 30

40 - 65
95 - 130
180 - 260

Others Blade fastening nut
Regular bolt, nut,
and screw

70
80
30
110

-

110
100
45
150

7
8
3.0
11

-

11
10
4.5
15

60
70
26
95

-

95
90
40
130

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

1-4 Special repairing materials
Material
Grease

Oil
Thread locking sealant

Location
Gear case
Rewind spring
Starter center post
Oil seal inner lips
Drive shaft
Starter case
Fuel tank bracket
Top guard

Remarks
Lithium based grease or ECHO LUBETM

Two-stroke engine oil or engine oil (SAE#30)

Loctite #222, ThreeBond #1344N or equivalent

SRM-5000

5

SERVICE INFORMATION

1-5 Service limits
A

B

C

D

5K222

5K223

5K224

E

F

G

H

5K225

5K016

5K042

K

L

M

5K245

5K246

1
2
3
4
5
6
7

0

5K219

5K220

5K189

8

5
10

9
10
11

A
B
C
D
E
F
G
H
K
L
M

Description
Cylinder bore
Piston outer diameter
Piston pin bore
Piston ring groove
Piston ring side clearance
Piston pin outer diameter
Piston ring width
Piston ring end gap
Con-rod small end bore
Crankshaft runout
Clutch drum bore

Min.
Max.
Max.
Max.
Min.
Min.
Max.
Max.
Max.
Max.

mm (in)
When plating is worn and aluminum can be seen
43.93 (1.730)
10.035 (0.3951)
1.6 (0.063)
0.1 (0.004)
9.98 (0.3929)
1.45 (0.057)
0.5 (0.02)
14.025 (0.5522)
0.05 (0.002)
79.5 (3.13)

6

SERVICE INFORMATION

SRM-5000

1-6 Special tools
2: a = 4 mm

1

4

5

10

11

6

1.

65

3: a = 5 mm
4
0.

1.

3
1.
5

a
7

8: a = 80 mm
9: a = 70 mm

a

12

13

14: a = 12 mm

a

16

17

21

22

18

b = 32 mm

15: a = 15 mm
b = 24.5mm

b

20

19

Key
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24

Part Number
895610-79920
895611-79920
897501-03938
897537-30130
897563-19830
897603-23030
897701-02830
897701-06030
897701-14732
897702-30131
897712-04630
897714-12330
897714-24330
897726-21430
897718-03930
897719-02830
363018-00310
897800-79931
897803-30130
897826-16131
897827-16131
897831-16131
897835-16131

Description
Tachometer
L-hex wrench (4 mm)
L-hex wrench (5 mm)
Puller
Piston stopper
Metering lever gauge
PTO shaft puller
Bearing wedge
Bearing wedge
Bearing tool
Piston pin tool
2-pin wrench
Oil seal tool
Oil seal tool
Oil seal tool
Bearing tool
Piston holder
Washer
Spark tester
Pressure tester
Pressure plug
Pressure plate
Pressure plug
Pressure connector

23

24

Used for:
Measuring engine speed to adjust carburettor
Removing and installing hex. socket bolt (M5)
Removing and installing hex. socket bolt (M6)
Removing flywheel
Locking crankshaft rotation
Measuring metering lever height on carburettor
Removing PTO shaft
Removing ball bearing remaining on crankshaft
Removing ball bearing on PTO shaft / drive gear
Removing and installing ball bearings on crankcase / clutch drum

Removing and installing piston pin (Use 10mm dia. adapter)
Removing and installing pawl carrier
Installing crankcase oil seal (clutch side)
Installing crankcase oil seal (starter side) / PTO shaft bearings

Installing crankcase oil seal (clutch side)
Installing crankcase oil seal (starter side)
Making piston steady to remove and install piston / ring
Installing crankcase oil seal (starter side)
Checking ignition system
Testing fuel pipes/tank and crankcase leakages
Plugging intake port to test crankcase / cylinder sealing
Plugging intake port to test crankcase / cylinder sealing
Plugging exhaust port to test crankcase / cylinder sealing
Testing crankcase and cylinder leakages


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