10-21P-02
GT-220ES, SRM-220ES
SERVICE DATA
TRIMMER/BRUSHCUTTER
GT-220ES
1
1
SRM-220ES
(Serial nember : 36000001 and after)
STAGE MODEL
(Serial nember : 37000001 and after)
INTRODUCTION
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.
CONTENTS
1 SERVICE INFORMATION
1-1 Specifi cation ............................................... 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
and Hi speed mixture needle settings ................... 7
2-3 Adjusting carburettor................................... 8
.............................. 2
page
...
needle
7
INDEX
Reference No.
REVISED: 200901
10-21P-02
ISSUED: 200705
GT-220ES
2
1 SERVICE INFORMATION
1-1 Specifi cations
Model
GT-220ES
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 cm
Bore mm(in) 32.2 (1.268)
Stroke mm(in) 26.0 (1.024)
Compression ratio 5.9
Carburettor Type
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
Spark plug BPMR8Y
Exhaust Muffl er type 36 series : Spark arrestor muffl er
37 series : Spark arrestor muffl er 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
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
Rear
Drive shaft Type Flexible
Diameter - Length mm(in)
Housing OD -ID mm(in) 25 - 22 (0.98 - 0.87)
(Main pipe) Length mm(in)
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
Cutting rotation
SERVICE INFORMATION
3
(in3) 21.2 (1.294)
Rotary valve type: Diaphragm, horizontal-draught, with primer
system combined with electronic speed governor
50 : 1 (2 %)
Integrated control grip with cushion
6.0 - 1330 (0.24 - 52.4)
1330 (52.4)
3/8 inch - 24UNF
Clockwise as viewed
from top
SRM-220ES (L) SRM-220ES (U)
6.0 - 1520 (0.24 - 59.8)
1500 (59.1)
Anticlockwise as viewed from top
SRM-220ES
U-handle with
integrated control grip
OD: Outer diameter. ID: Inner diameter.
* Without shoulder harness and cutter head.
GT-220ES
SRM-220ES
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/cm
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 Ω 130 - 200
Secondary coil resistance kΩ 1.0 - 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†
Hi speed mixture needle initial setting turns back
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
SERVICE INFORMATION
2
) (psi) 0.74 (7.6) (108)
†
1 3/8
2 3/4
3
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.
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