Echo 99944200610, SRM-2100SB, SRM-2400SB, SRM-210SB, SRM-211SB, SRM-260SB, SRM-261SB, PAS-2100, PAS-2400, PAS2601, PAS-210,... User manual

10-21B-OO SRM-2100SB SRM-2400SB
1
ECHO
SERVICE DATA
TRIMMER/BRUSHCUTTER
SRM-2100SB
SRM-2400SB
INTRODUCTION CONTENTS
page
ECHO
SERVICE MANUAL Ord.No. 402-18 1 SERVICE INFORMATION ............................. 2
contains lots of
information for servicing these
models.
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.
1-1 Specifications ............................................ 2
1-2 Technical data ........................................... 3
1-3 Carburetordata ......................................... 3
1-4 Torque limits .............................................. 4
1-5 Specialrepairing materials ...... .. .. .. ........ .. . 4
1-6 Service limits ............................................. 5
Reference No. 10-21B-OO
ISSUED: 199806
;·
SO MENU.
KIORITZ CORPORATION
TOKYO JAPAN
Printed in Japan

2 SERVICE INFORMATION
SRM-210058
SRM-240058
1 SERVICEINFORMATION
1-1 Specifications
Model SRM-2100SB
SRM-2400SB
Dimensions*Length mm(in) 1770 (69.7) 1770 ( 69.7 )
Width mm(in) 300 (11.8) 300 ( 11.8 )
Height mm(in) 330 (13.0) 330
( 13.0 )
Dry weight kg(lb) 5.6 {12.3)t 5.7 (12.6)t
Engine Type KIORITZ, air-cooled, two-stroke, single cylinder
Rotation Counterclockwise as viewed from the output
end
Displacement cm3(in3) 21.2 (1.294) 23.6 (1.440)
Bore mm(in) 32.2 (1.268) 34.0 (1.339 )
Stroke mm(in) 26.0 {1.024) 26.0
( 1.024 )
Compression ratio 6.5 6.3
Carburetor Type Diaphragm,
horizontal-draught, with primer
Model
ZAMAC1U WalbroWT
Ignition Type CDI (Capacitor discharge ignition) system
in a single integrated
piece
Spark plug BPM7A, BPMR7A,
CJ-7Y
Starter Type Automatic rewind
Rope diameter x length mm(in) 3.0
X 890 (0.12 X 35.0) 3.0 X 1000 (0.12 X 39.4}
Fuel Type Premixed two-stroke fuel (Refer to Operator's manual.
)
Tank capacity cm3(U.S.fl.oz.) 420 (14.2)
Clutch Type Centrifugal, 2-shoe
slide
Handle Type Front D-loop with cushion grip
Rear Integrated control
grip
Drive shaft Type
Flexible
Diameter mm(in)
6.15(1/4)
Length Front mm(in) 752 ( 29.6 )
Rear
mm(in) 806.2 (31.74) with coupling
Lubrication Lithium based
grease
Housing
OD-ID mm(in) 25- 22 (0.98- 7/8)
(Main pipe) Front mm(in) 738
(29.1)
Length
Rear mm(in) 756
(29.8)
Gear case Reduction ratio
1.36
Gear tooth Spiral bevel
gear
Lubrication Lithium based
grease
Cutter Type Nylon line cutter, 8-tooth blade**, 80-tooth blade**,
Others
Pilot diameter mm(in) 20.0 (0.79)
Option
Fastener type, size mm Left-hand thread nut, M10 x 1.25 pitch
Cutting rotation Counterclockwise as viewed from top
Attachment (Option) Edger, Tiller/Cultivator, Hedge clipper, Power
pruner
Shoulder harness, U-handle
kit
OD: Outer
diameter.
*Without shoulder harness and Nylon line
head ID: Inner
diameter.
tWithout shoulder harness, with STD Nylon line head.
**Install and use U-shaped handle and metal blade kit when operating any model with
blade.

Model
SRM-2100SB
SRM-2400SB
E
ngine
Idling speed rpm
2400-3200
2400-3200
Operating
speed w/ Nylon line head rpm
8000-9000 8500-9500
wl Blade(Option) rpm
9500- 11000
9500- 11000
Clutch
-in speed rpm
3400-3800
3400-3800
Compression
pressure, standard kgf/cm2(psi)
7.0(100) 7.5 (107)
I nition system
Spark plug gap
mm(in)
0.6- 0.7 (0.024- 0.028)
Minimum secondary voltage at
1000
rpm kV
15
Secondary coil resistance kQ
1.3- 1.8
Pole shoe air gaps mm(in)
0.3 - 0.4 (0.012 - 0.016)
Ignition timing
0
BTDC
( 33) 28
28
1-2 Technical data
g
BTDC: Before top dead center.
1-3 Carburetor data
Carburetor Model
C1U-K47
I C1U-K52
WT-424A
I WT-4248
Type
Diaphragm horizontal-draught
Supplier
ZAMA
Walbro
Venturi Size mm(in)
8.5 (0.335)
7.94 (5/16)
Throttle Bore mm(in)
12.7 ( 1/2 )
12.7 ( 1/2 )
Idle speed screw initial setting_ turnin
3-4
3-4
Test Pressure, minimum
kgf/cm2(psi)
0.5
(7.0)
Metering lever height mm(in)
lower than diaphragm seat
0.1 - 0.25 (0.004 - 0.010)
1.65 (0.065)
Applicable model
SRM-210058
SRM-240058

SRM-2100SB
4
SRM-2100SB
SERVICE INFORMATION SRM-2400SB
1-4 Torque limits
Descriptions
Size
kgf•cm
in•lbf
Starter
system
Pawl carrier
M 8
80-100
70-90
Starter case Bolts
M 4*
22-28
19-24
Ignition
system
Ignition coil Bolts
(COl module) M
4* 38-55 33-48
Fancover Bolts
M 4*
38-55
33-48
Spark plug
M14
150-170
130-150
Fuel
system
Carburetor insulator
M 5*
30-40
25-35
Carburetor
M 5
35-45
30-40
Throttle wire housing nut
M 6
6- 10
5-9
Fuel tank
M 5*
27-32
23-28
Clutch Clutch hub
M 8
180-200
160- 175
Engine
Crankcase Bolts
M 5
75-85
65-75
Cylinder
M 5
75.85
65-75
Cylinder cover
M 4*
35-45
30-40
Muffler
M 5
55-65
50-55
Top guard
M 5*
25-35
22-30
Others Blade fastener
LM10
280-320
245-280
Regular bolt,nut,and screw
M 3
6-10
5-9
M 4
15-25
13-22
M 5
25-45
22.40
M 6
45-75
40.65
M 8
110-150
95- 130
LM:Left-hand thread.
• Apply thread locking sealant. (See below.)
1-5 Specia
l repairing materials
Material
Location
Remarks
Grease
Drive shaft
Lithium based grease
Gear case
Rewind spring
Starter center post
Thread locking sealant
Starter case
Loctite #222,ThreeBond #1342,or equivalent
Ignition coii(CDI module)
Fancover
Carburetorinsulator
Fueltank
Cylinder cover
Top guard

SRM-2400SB SERVICE INFORMATION 5
1-6 Service limits
A
8 c
D
mm (in)
Models
SRM-210058
I
SRM-2400SB
A
Cylinder bore
When plating is worn and aluminum can be seen
B
Piston outer diameter Min.
32.10 (1.264)
I 33.90 (1.335)
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.
7.98 (0.3142)
G
Piston ring width Min.
1.45 (0.057)
H
Piston ring end gap Max.
0.5 (0.02)
K
Crankshaft runout Max.
0.05 (0.002)
L
Clutch drum bore Max.
51.5 (2.03)