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SRM 5000 10 52D 02 .pdf


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1

SRM-5000

10-52D-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:

INDEX

200609

ISSUED: 200510

2

SERVICE INFORMATION

SRM-5000

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

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

Rotation
Displacement
cm3(in3)
Bore
mm(in)
Stroke
mm(in)
Compression ratio
Carburettor Type
Model
Venturi size-Throttle bore mm(in)
Metering diaphragm pressure
Ignition
Type

Starter
Fuel

Clutch
Handle
Drive shaft

Gear case

Cutter

SRM-5000(L)
1860 (73.2)
325 (12.8)
265 (10.4)
8.3 (18.30)

SRM-5000(U)
1860 (73.2)
700 (27.6)
430 (16.9)
8.7 (19.18)

KIORITZ, air-cooled, two-stroke, single cylinder
Semi-automatic decompression
Anticlockwise as viewed from the output end
51.7 (3.155)
44.0 (1.732)
34.0 (1.339)
6.9 : 1
Rotary type : Diaphragm, horizontal-draught, with primer††
Walbro WYK-227
13.5 - 15.0 (0.531 - 0.591)
Lead pressure from inside of cleaner case
CDI (Capacitor discharge ignition) system in a single integrated
piece, with electronic timing advancer and speed governer

Spark plug
RCJ-6Y
Type
Automatic rewind
Rope diameter x length mm(in)
3.8 x 1150 (0.15 x 45.3)
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)
Type
Centrifugal, 2 - shoe pivot
Type
Front Crescent loop w/cushion grip
U-shaped
Rear Integrated control grip w/cushion
--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)
Reduction ratio
1.33
Gear tooth
Spiral bevel gear
Lubrication
Lithium based grease
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.

SRM-5000

3

SERVICE INFORMATION

1-2 Technical data
Engine
Idling speed
r/min
Operating speed
r/min
Wide open throttle speed
r/min
Clutch engagement speed
r/min
2
Compression pressure
MPa (kgf/cm ) (psi)
Ignition system
Spark plug gap
mm (in)
Minimum secondary voltage at 1000 r/min
kV
Secondary coil resistance
k
Pole shoe air gaps
mm(in)
Ignition timing at 1000 r/min
°BTDC
at 3000 r/min
°BTDC
at 7000 r/min
°BTDC
at 10000 r/min
°BTDC
Carburettor
Idle adjust screw initial setting
turn in*
Idle mixture needle initial setting
turn in**
H mixture needle initial setting
turn back
Test Pressure, minimum
MPa (kgf/cm2) (psi)
Metering lever height
mm (in)

2000 - 2700
7500 - 8500
9700 - 10300 †1
10500 - 12000 †2
3400 - 3900
0.93 (9.5) (135)
0.6 - 0.7 (0.024 - 0.028)
14.0
2.0 - 2.8
0.30 - 0.40 (0.012 - 0.016)
28
35
40
33
3 3/4
13 1/2
4
0.05 (0.5) (7.0)
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
†2
With two line nylon line head.
With metal blade.

4

SERVICE INFORMATION

SRM-5000

1-3 Torque limits
Descriptions
Starter Pawl carrier
system Pawl carrier nut

Size
M8
M8

kgf•cm
80 - 100
160 - 200

N•m
8 - 10
16 - 20

in•lbf
70 - 90
140 - 175

Starter case
Ignition Magneto rotor (Flywheel)
system Ignition coil

M 5*
M 10
M5

35 - 50
200 - 240
60 - 100

3.5 - 5
20 - 24
6 - 10

30 - 45
175 - 210
50 - 90

Spark plug
Fan cover
Fuel
Carburettor insulator
system Carburettor

M 14
M5
M5
M5

150
70
40
30

-

170
110
55
45

15
7
4
3

-

17
11
5.5
4.5

130
60
35
26

-

150
95
50
40

Fuel tank bracket
Fuel tank
Clutch Clutch shoe
Engine Crankcase
Cylinder
Decompression valve
Top guard
Muffler
Muffler cover
Muffler stay
Others Blade fastening nut
Regular bolt, nut and screw

M5
M 5*
M8
M 5**
M 5**
M8
M 5*
M6
M 5*
M5
LM 10
M3
M4
M5
M6
M8
M 10

70
50
160
70
70
80
30
110
30
70
280
6
15
25
45
110
210

-

110
90
200
110
110
100
45
150
45
110
320
10
25
45
75
150
300

7
5
16
7
7
8
3
11
3
7
28
0.6
1.5
2.5
4.5
11
21

-

11
9
20
11
11
10
4.5
15
4.5
11
32
1
2.5
4.5
7.5
15
30

60
45
140
60
60
70
26
95
26
60
245
5
13
22
40
95
180

-

95
80
175
95
95
90
40
130
40
95
280
9
22
40
65
130
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
Grease

Oil
Thread locking sealant

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

Remarks
Lithium based grease or ECHO LUBETM

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

Loctite #242, ThreeBond #1324 or equivalent

SRM-5000

5

SERVICE INFORMATION

1-5 Service limits
A

B

5K245

E

F

5K225

K

5K222

5K016

C

D

5K223

5K224

G

H

5K042

L

5K246

M

1
2
3
4
5
6
7

0

8

5
10

9
10

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

11

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

mm (in)
When plating is worn and aluminium can be seen
43. 88
(1.728)
10. 115 (0.3982)
1. 6
(0.063)
0. 1
(0.004)
9. 95
(0.392)
1. 45
(0.057)
0. 5
(0.02)
14. 025 (0.552)
0. 05
(0.002)
79. 5
(3.13)

6

SERVICE INFORMATION

SRM-5000

1-6 Special tools
2: a = 4 mm
3: a = 5 mm

4

5

10

11

6

4
0.

3
1.

1.
65

1

1.
5

a
7

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

a

12

13

a

14: a = 12 mm

16

17

18

b = 32 mm

15: a = 15 mm
b = 24.5mm

b

19

20

21

22

23

24

25

60
60
40
40
20
20

80
80 10
0
10
0
12
0
12
0
14
0
14
0
16
0
16
0
18
0
18
0
20
20

26

EC

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
25
26

Part Number
897801-33330
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
897803-30132
897826-16131
897827-16131
897831-16131
897835-16131
91007
91020

Description
Tachometer PET-1000
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
Compression guage
Limiter plug tool

HO

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
Measuring cylinder compression
Removing and installing limiter plug

SRM-5000

SERVICE INFORMATION

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.

(A)

(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.

(B)

(4)Repeat plug removal procedure for the other
mixture needle.
(C)

(C)

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.
(D)
(F)

(E)

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.

8

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.

(C)

(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.

(D)

(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.

(F)
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).

SRM-5000

SERVICE INFORMATION

9

2-3 Adjusting carburettor(continued)

ECHO

(G)

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.

EC

HO


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