Echo HCA-2500 User Manual

HCA-250015-23C-00

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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.

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 Presetting idle adjust screw, L mixture needle

and H mixture needle........................................7

2-3 Adjusting carburettor..................................9

Reference No. 15-23C-00

ISSUED: 200606

INDEX

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1 SERVICE INFORMATION

1-1 Specifications

Dimensions Length mm(in) 2330 (91.7)

Width mm(in) 225 (9.3)
Height mm(in) 225 (9.3)
Dry weight kg(lb) 6.4 (14.1)

Engine Type

Rotation Anticlockwise as viewed from the output end
Displacement cm3(in3) 23.6 (1.440)
Bore mm(in) 34.0 (1.339)
Stroke mm(in) 26.0 (1.024)
Compression ratio 6.3

Carburettor Type Rotary type : Diaphragm, horizontal-draught, with primer (purge pump)

Model Walbro WT-424C
Venturi size-Throttle bore mm(in) 7.9 - 12.7 (0.31 - 0.5)

Ignition Type CDI (Capacitor discharge ignition) system

Spark plug BPMR7A

Starter Type Automatic rewind

Rope diameter x length mm(in) 3.0 x 1000 (0.12 x 39.4)

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.) 0.4 (13.5)
Clutch Type Centrifugal, 2 - shoe slide
Handle Type Front Rubber grip

Drive shaft Type Flexible

Inner shaft: Diameter - Length mm(in) 6.15 - 1522 (0.24 - 60.0)

Housing OD -ID mm(in) 25 - 22 (0.98 - 0.87)
(Main pipe) Length mm(in) 1500 (59.0)

Gear case Reduction ratio 3.95

Gear tooth Spiral bevel

Lubrication Lithium based grease
Cutter Type Double reciprocating, double edge blade

Called Length mm(in) 450 (18)

Pitch mm(in) 35.0 (1.38)

Height mm(in) 21.0 (0.83)

Thickness mm(in) 2.5 (0.098)

Articulate adjustment 180° variable at 15° pitch + storage position
OD: Outer diameter. ID: Inner diameter.

SERVICE INFORMATION HCA-2500

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

with electronic speed governor

Rear Rubber grip with throttle trigger

SERVICE INFORMATIONHCA-2500

1-2 Technical data

Engine

Idling speed r/min 2400 - 3200
Operating speed r/min 7000 - 8000
Wide open throttle speed r/min 9000 - 10500
Clutch engagement speed r/min 3700 - 4300
Compression pressure MPa (kgf/cm2) (psi) 0.94 (9.6) (136)

Ignition system

Spark plug gap mm(in) 0.6 - 0.7 (0.024 - 0.028)
Minimum secondary voltage at 1500 r/min kV 15
Primay coil resistance Ω 200 - 400

Secondary coil resistance kΩ 1.3 - 1.8

Pole shoe air gaps mm(in) 0.30 - 0.40 (0.012 - 0.016)
Ignition timing at 3000 r/min °BTDC 29

at 8000 r/min °BTDC 28
at 9000 r/min °BTDC 12

Carburettor

Idle adjust screw initial setting turn in* 1 1/2
L mixture needle initial setting turn back 2 1/4
H mixture needle initial setting turn back 3 1/4
Test Pressure, minimum MPa (kgf/cm2) (psi) 0.05 (0.5) (7.0)
Metering lever height mm(in) 1.65 (0.065) lower than diaphragm seat

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