Echo PB-655 User Manual
21-63G-00
PB-655, PB-755
1
2
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 and directions in this SERVICE
DATA are based on the latest products
information available at the time of
publication. ECHO SERVICE MANUAL Ord.
No. 403-12 contains lots of information for
servicing these models.
CONTENTS
page
1 SERVICE INFORMATION ............................. 2
1-1 Specification ............................................... 2
1-2 Technical data ............................................ 3
1-3 Torque limits ............................................... 3
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 Idle adjust screw, idle mixture needle and hi
speed (H) mixture needle initial settings........... 7
2-3 Adjusting carburettor .................................. 8
Reference No. 21-63G-00
ISSUED: 200705
7
INDEX
PB-655
2
1 SERVICE INFORMATION
1-1 Specifications
Model PB-655 PB-755
Dimensions Length* mm(in) 380 (15.0)
Width* mm(in) 480 (18.9)
Height* mm(in) 525 (20.7)
Dry weight** kg(lb) 11.3 (24.89) 11.9 (26.21)
Engine Type KIORITZ, air-cooled, two-stroke, single cylinder
Rotation Anticlockwise as viewed from the output end
Displacement cm3(in3) 63.3 (3.86)
Bore mm(in) 48.0 (1.89)
Stroke mm(in) 35.0 (1.38)
Compression ratio 6.3
Carburettor Type Diaphragm, horizontal-draught, with primer
Model Walbro WYK-192
Ignition Type CDI (Capacitor discharge ignition) system
Spark plug BPM8Y
Exhaust Muffler type Spark arrestor muffler
Starter Type Automatic rewind
Rope diameter x length mm(in) 3.5 x 1000 (9/64 x 39 1/2)
Fuel Type Premixed two-stroke fuel
Mixture ratio 50 : 1 (2 %)
Petrol Minimum 89 octane unleaded
Two-stroke air cooled engine oil ISO-L-EGD (ISO/CD13738), JASO FC/FD
Tank capacity L (U.S.fl.oz.) 2.0 (67.7)
Throttle Mount Tube-mounted throttle with cruise control
Blower Fan type Centrifugal, single stage
Max. air volume (with pipes)
m3/min (ft3/min) 17.7 (625)**
Max. air velocity (with pipes)
Discharge ID mm (in) 70 (2.75)
ID : Inner diameter.
* Without flexible pipe and blower pipes.
SERVICE INFORMATION
m/s (mph) 92 (205)
PB-755
** With frexible pipe and blower pipes.
PB-655
PB-755
1-2 Technical data
Model PB-655 PB-755
Engine
Idling speed r/min 2400 - 2800
Wide open throttle speed r/min 6800 - 7300
Compression pressure MPa (kgf/cm2) (psi) 1.05 (10.7) (152)
Ignition system
Spark plug gap mm(in) 0.6 - 0.7 (0.024 - 0.028)
Minimum secondary voltage at 1000 r/min kV 12
Primary coil resistance Ω 150 - 250
Secondary coil resistance kΩ 1.2 - 1.8
Pole shoe air gaps mm(in) 0.3 - 0.4 (0.012 - 0.016)
Ignition timing °BTDC 30
Carburettor
Venturi size mm(in) 15.0 (0.591)
Throttle bore mm(in) 15.0 (0.591)
Idle adjust screw initial setting turn back* 8
Idle mixture needle initial setting turn in** 10
H mixture needle initial setting turn back 3 3/4
Test Pressure, minimum MPa (kgf/cm2) (psi) 0.05 (0.5) (7.0)
Metering lever height mm(in) 1.5 (0.06) lower than diaphragm seat
SERVICE INFORMATION
3
BTDC: Before top dead centre.
* Refer to page 7 on 2-2 initial idle adjust screw.
** Screw in idle mixture needle from initial thread engagement (at the point that the clicking sound is heard).
Loading...