Echo PB-651T/H Manual de usuario

SERVICE

MANUAL

PB-651T/H

PB-751

T/H

PB-755T/H

SERVICE INFORMATION

1 SERVICE INFORMATION

1-1 Specifications

Model PB-651T/H PB-751T/H PB-755T/H

Dimensions Length*

mm(in)

375

(14.8)

Width* mm(in) 485

(19.0)

Height*

mm(in)

527

(20.8)

Dry weight** kg(lb)

11.2 (24.7) / 11.4 (25.1) 11.6 (25.7)

/ 11.8(26.1)

11.0 (24.2) / 11.2 (24.6)

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

Rotation Counterclockwise as viewed from the output end

Displacement cm3(in3) 63.3 (3.863)

Bore mm(in) 48.0 (1.89)

Stroke mm(in) 35.0 (1.38)

Compression ratio 6.3

Carburetor Type

Rotary

type:

Diaphragm, horizontal-draught,

with

primer (purge

bulb)

Model WalbroWYK-192

Ignition Type CDI (Capacitor discharge ignition) system

Spark plug BPM8Y

Exhaust Muffler type Spark arrestor muffler with catalyst

Starter Type Automatic rewind with shutter

Rope diameter x length mm(in) 3.5 x 1000 (9/64 x 39 1/2)

Fuel Type mm(in) 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 FC

Tank capacity L (U.S.fl.oz.) 2.0 (67.64)

Throttle Mount T type Tube-mounted throttle with cruise contol

H type Hip-mounted throttle with cruise contol

Blower Fan type Centrifugal, single stage

Max. air volume (with pipes)

m3/min (ft3/min) 17.6 (620)**

Max. air velocity (with pipes)

m/s (mph) 92 (205)

Discharge ID mm (in) 62 (2.44)

ID : Inner diameter.

* Without blower pipes.

** With straight pipes.

PB-651T/H

PB-751

T/H

PB-755T/H

SERVICE INFORMATION

1-2 Technical data

Model PB-651T/H PB-751T/H PB-755T/H

Engine

Idling speed r/min 2400 - 2800

Wide open throttle speed r/min 6800 - 7300

Compression pressure MPa (kgf/cm2) (psi) 1.0 (10.2) (145)

Ignition system

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

Minimum secondary voltage at 1000 r/ min kV 12

Secondarycoil resistance

Ω

1.2 -

1.8

Pole shoe air gaps

mm(in)

0.3 - 0.4 (0.012 - 0.016)

Ignition timing

°BTDC

Carburetor

Venturi size mm(in) 15.0 (0.591)

Throttle bore

mm(in)

15.0 (0.591)

Idle adjust screw initial setting

turn in*

1 1/2

Test Pressure, minimum

MPa

(kgf/cm

) (psi)

0.05 (0.5) (7.0)

Metering lever height

(in)

1.5 (0.06) lower than diaphragm seat

BTDC: Before top dead center.

* Set idle speed screw to the point that its tip just contacts throttle plate before initial setting.

PB-651T/H

PB-751

T/H

PB-755T/H

SERVICE INFORMATION

1-3 Torque limits

Descriptions

Size

kgf

•

N•

in•

lbf

Starter Starter pawl assembly

M 10

80 - 100

8 -

70 - 90

system Starter case M 5*** 35 - 50 3.5 - 5 30 - 45

Ignition

Flywheel

M 10

200 - 240

20 - 24

175 - 210

system

C.D.I module

M 5

60 - 100

6 -

50 - 90

Fuel

Spark plug

M 14

150 - 170

15 - 17

130 - 150

system

Carburetor

M 5

40 - 55

4 - 5.5

35 - 48

Intake insulator

M 5

35 - 45

3.5 - 4.5

30 - 40

Fuel tank

M 5

20 - 40

2 -

17 - 35

Engine

Crankcase

M 5

70 - 110

7 -

60 - 95

Cylinder

M 5

70 - 110

7 -

60 - 95

Engine plate

M 5*

20 - 40

2 -

17 - 35

Engine mount

M 6

100 - 150

10 - 15

90 - 130

Cylinder cover

M 5

40 - 55

4 - 5.5

35 - 48

Engine cover

M 5**

20 - 40

2 -

17 - 35

Muffler

M 6***

110 - 150

11 - 15

95 - 130

Muffler stay

M 5

70 - 110

7 -

60 - 95

Muffler guide

M 4

15 - 25

1.5 - 2.5

13 - 22

Others

Fan

M 5

50 - 75

5 - 7.5

45 - 65

Fan case

40 - 55

4 - 5.5

35 - 48

Blower grid

M 5**

20 - 40

2 -

17 - 35

Cushion

Frame side

M 5***

20 - 40

2 -

17 - 35

Top

** 20 - 40 2 -

17 - 35

Bottoms

M 5** 80 - 100 8 -

70 - 90

Main pipe

M 5

20 - 40

2 -

17 - 35

High tension lead clip

M 5**

40 - 50

4 -

35 - 45

Harness fixture

M 5**

20 - 40

2 -

17 - 35

Trigger bracket fixture

M 5

20 - 30

2 -

17 - 26

Throttle lever

M 6

20 - 30

2 -

17 - 26

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

Fan case side

* Tapping screw

** Tapping bolt

*** Apply thread locking sealant (See next page)

PB-651T/H

PB-751

T/H

PB-755T/H

SERVICE INFORMATION

1-4 Special repairing materials

Material

Location

Remarks

Grease

Rewind spring

Lithium based grease

Starter center post

Oil seal inner lips

Thread locking sealant

Ball bearing

Loctite #675 or equivalent

Muffler

Loctite #242, ThreeBond #1324 or equivalent

Starter case

Loctite #222, ThreeBond #1342 or equivalent

Cushion (Frame side)

Loctite #222, ThreeBond #1342 or equivalent

PB-651T/H

PB-751

T/H

PB-755T/H

SERVICE INFORMATION

1-5 Service limits

A B C D

5K247 5K248 5K249 5K250

E F G H

5K251 5K016 5K042 5K252

K L

5K219 5K220

Description

(in)

Cylinder bore

When plating is worn and aluminum can be seen

Piston outer diameter Min.

47.

(1.888)

Piston pin bore Max.

10.

(0.395)

Piston ring groove,

1st Max.

(0.065)

2nd Max.

(0.063)

Piston ring side clearance Max.

(0.004)

Piston pin outer diameter Min.

(0.393)

Piston ring width Min.

(0.057)

Piston ring end gap Max.

(0.02)

Con-rod small end bore Max.

14.

025(0.552)

Crankshaft runout Max.

(0.002)

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