Echo PB-760LN H Betriebsanleitung

PB-760LN H, PB-760LN T

21-63J-00 1

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INTRODUCTION

We are constantly working on technical im-

provement of our products. For this reason,

technical data, equipment and design are

subject to change without notice. All speci-

fications and directions in this SERVICE

MANUAL SUPPLEMENT are based on the

latest product information available at the

time of publication.

CONTENTS

page

1 SERVICE INFORMATION.............................. 2

1-1 Specication ............................................... 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 CARBURETOR ADJUSTMENT PROCEDURE .... 7

2-1 General adjusting rules............................... 7

2-2 Complete adjustment.................................. 7

Reference No. 21-63J-00

ISSUED: 201211

SERVICE INFORMATION PB-760LN T/H

1 SERVICE INFORMATION

1-1 Specications

Model PB-760LN T PB-760LN H

Dimensions Length* mm(in) 375 (14.8)

Width* mm(in) 490 (19.3) 535 (21.1)

Height* mm(in) 475 (18.7)

Dry weight** kg(lb) 11.9 (26.2) 12.0 (26.4)

Engine Type YAMABIKO, air-cooled, two-stroke, single cylinder

Rotation Counterclockwise 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 5.8

Carburetor Type

Rotary type : Diaphragm, horizontal-draft, with separated purge bulb

Model Walbro WYK-387 with Small D-shaped mixture needle

Ignition Type CDI (Capacitor discharge ignition) system

Variable Slope Timing (VST) : Slope advance ignition

system combined with electronic speed governor

Spark plug BPM6Y (CANADA : BPMR6Y)

Exhaust Mufer type Spark arrester mufer with catalyst

Starter Type Automatic rewind

Rope diameter x length mm(in) 3.5 x 1000 (0.14 x 39.37)

Fuel Type Premixed two-stroke fuel

Mixture ratio 50 : 1 (2 %)

Gasoline Minimum 89 octane unleaded

Two-stroke air cooled engine oil ISO-L-EGD (ISO/CD13738), JASO M345-FC/FD

Tank capacity L (U.S..oz.) 1.98 (67.0)

Throttle Mount Tube-mounted throttle Hip-mounted throttle

with cruise control with cruise control

Blower Fan type Closed fan

Max. air volume (with pipes)

m3/min (ft3/min) 16.6 (585)***

Max. air velocity (with pipes)

m/s (mph) 87.2 (195)***

Discharge ID mm (in) 63 (2.48)***

ID : Inner diameter.

* Without exible pipe and blower pipes.

** With exible pipe and blower pipes.

*** With taper pipe.

SERVICE INFORMATIONPB-760LN T/H 3

1-2 Technical data

Model PB-760LN T PB-760LN H

Engine

Idling speed* RPM 2,500 +/- 200

Wide open throttle speed* RPM 5,800 - 6,200

Compression pressure MPa (kgf/cm2) (psi) 0.81 (8.3) (118)

Ignition system

Spark plug gap mm(in) 0.6 - 0.7 (0.024 - 0.028)

Minimum secondary voltage at 1,500 RPM kV 22

Primary coil resistance 300 - 350

Secondary coil resistance k 2.5 - 2.9

Pole shoe air gaps mm(in) 0.3 - 0.4 (0.012 - 0.016)

Ignition timing at 3,000 RPM °BTDC 16

at 6,000 RPM °BTDC 23

PET-9000 Parameter 1 307

Parameter 2 00

Carburetor

Venturi size mm(in) 12.2 (0.5)

Throttle bore mm(in) 12.2 (0.5)

Idle adjust screw initial setting turns in** 5/8

Idle mixture needle initial setting turns in*** 6 1/2

Hi speed mixture needle initial setting turns out 3 5/8

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

BTDC: Before top dead center. *With all blower pipes.

** Set idle adjust 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).

1-3 Torque limits

Descriptions Size kgf  cm Nm inlbf

Starter Starter pawl assembly M 10 80 - 100 8 - 10 70 - 90

system Starter case M 5* 25 - 45 2.5 - 4.5 22 - 40

Ignition Flywheel M 10 200 - 240 20 - 24 175 - 210

system C.D.I module M 5 60 - 90 6 - 9 50 - 80

Fuel Spark plug M 14 130 - 170 13 - 17 115 - 150

system Carburetor M 5 30 - 40 3 - 4 26 - 35

Intake bellows M 5* 60 - 90 6 - 9 50 - 80

Fuel tank M 5* 20 - 40 2 - 4 17 - 35

Engine Crankcase M 5 70 - 110 7 - 11 60 - 95

Cylinder M 5 70 - 110 7 - 11 60 - 95

Engine plate M 5 20 - 30 2 - 3 17 - 26

Engine mount M 6* 130 - 180 13 - 18 115 - 160

Cylinder cover M 5* 20 - 30 2 - 3 17 - 26

Engine cover Crankcase side M 5* 25 - 45 2.5 - 4.5 22 - 40

Fan case side M 5 30 - 45 3 - 4.5 26 - 35

Cleaner case side M 5 35 - 55 3.5 - 5.5 30 - 48

SERVICE INFORMATION PB-760LN T/H

Descriptions Size kgf  cm Nm inlbf

Engine Dust cover M 5* 25 - 45 2.5 - 4.5 22 - 40

Mufer M 6 130 - 180 13 - 18 115 - 160

Mufer stay M 5 70 - 110 7 - 11 60 - 95

Exhaust guide M 4 15 - 30 1.5 - 3 13 - 26

Others Fan case Blower grid side M 5 20 - 30 2 - 3 17 - 26

Fan case lid M 5 25 - 35 2.5 - 3.5 22 - 30

Form pad M 5 20 - 30 2 - 3 17 - 26

Blower fan M 10 200 - 240 20 - 24 175 - 210

Backpack harness M 5 40 - 60 4 - 6 35 - 50

Backpack frame M 5 40 - 50 4 - 5 35 - 45

Backpack stopper M 5 35 - 45 3.5 - 4.5 30 - 40

Cleaner case M 5 30 - 50 3 - 5 26 - 45

Trigger bracket xture M 5 35 - 55 3.5 - 5.5 30 - 50

Throttle lever M 6 35 - 55 3.5 - 5.5 30 - 50

lead M 5 30 - 45 3 - 4.5 26 - 40

Regular bolt, nut and screw M 3 6 - 10 0.6 - 1 5 - 9

M 4 15 - 25 1.5 - 2.5 13 - 22

M 5 25 - 45 2.5 - 4.5 22 - 40

M 6 45 - 75 4.5 - 7.5 40 - 65

M 8 110 - 150 11 - 15 95 - 130

* Apply thread locking sealant (See below)

1-3 Torque limits (Continued)

1-4 Special repairing materials

Material Location Remarks

Grease Rewind spring Lithium based grease or ECHO XTended

Protection TM Lubricant

Starter center post

Oil seal inner lips

Thread locking sealant Engine mount Loctite #675 or equivalent

Dust cover Loctite #242, ThreeBond #1324 or equivalent

Engine cover (Crankcase side)

Starter case

Loctite #222, ThreeBond #1342 or equivalent

Fuel tank

Cylinder cover

Intake bellows

SERVICE INFORMATIONPB-760LN T/H 5

Description mm (in)

A Cylinder bore When plating is worn and aluminum can be seen

B Piston outer diameter Min. 47. 89 (1.885)

C Piston pin bore Max. 10. 035 (0.3951)

D Piston ring groove, 1st Max. 1. 65 (0.065)

2nd Max. 1. 6 (0.063)

E Piston ring side clearance Max. 0. 1 (0.004)

F Piston pin outer diameter Min. 9. 98 (0.3929)

G Piston ring width Min. 1. 45 (0.057)

H Piston ring end gap Max. 0. 6 (0.02)

K Con-rod small end bore Max. 14. 025 (0.5522)

L Crankshaft runout Max. 0. 01 (0.001)

5K249 5K250

5K251 5K016 5K042

5K248

5K247

5K252

5K219 5K220

ABCD

EF GH

1-5 Service limits

SERVICE INFORMATION PB-760LN T/H

OPP AMA

PET -9 00 0

INTEGRATED IGNITION ANALYZER

352

67: a = 8mm

8: a = 10 mm

9 10 11

1312 15 16

191817 20

1-6 Special tools

21 22

Key Part Number Description Used for:

1 G310-000050 Tachometer PET-304 Measuring engine speed to adjust carburetor

2 91004 Module air gap gauge Adjusting pole shoe air gaps

3 X605-000050 Torx L wrench Removing and installing bolt

4 897501-03938 Puller Removing magnetor rotor

5 897537-30130 Piston stopper Locking crankshaft rotation

6 897900-00001 Metering lever gauge Measuring metering lever height on carburetor

7 897558-02830 T-socket wrench(8mm) Removing and installing hex.bolt (M5)

8 897558-10230 T-socket wrench(10mm) Removing and installing hex.bolt (M6)

9 897701-14732 Bearing tool Removing and installing crankcase ball bearings

10 897702-30131 Piston pin tool Removing and installing piston pin (Use 10 mm dia. adapter.)

11 897712-07930 2-pin wrench Removing and installing pawl carrier

12 91101 Piston holder Making piston steady to remove and install piston/rings

13 897726-21430 Oil seal tool Installing crankcase oil seal

14 990511-30023 Spark tester Checking ignition system

15 897803-30133 Pressure tester Testing carburetor and crankcase leakage

16 897826-16131 Rubber plug Testing crankcase and cylinder leakage

17 897827-16131 Pressure plate Testing crankcase and cylinder leakage

18 897834-79930 Rubber plug Testing crankcase and cylinder leakage

19 91018 Pressure connector Testing crankcase and cylinder leakage

20 91037 Compression gauge Measuring cylinder compression

21 91059L D-shaped tool Adjusting mixture needle

22 900300 Ignition Analyzer : PET-9000 Measuring Ignition timing, Primary/Secondary voltage engine speed

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