background image

SERVICE INFORMATION

PB-655
PB-755

5

Description

mm (in)

A

Cylinder bore

When plating is worn and aluminum can be seen

B

Piston outer diameter

Min.

47. 95

(1.888)

C

Piston pin bore

Max.

10. 030 (0.395)

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

(0.393)

G

Piston ring width

Min.

1. 45

(0.057)

H

Piston ring end gap

Max.

0. 5

(0.02)

K

Con-rod small end bore

Max.

14. 025 (0.552)

L

Crankshaft runout

Max.

0. 05

(0.002)

5K249

5K250

5K251

5K016

5K042

5K248

5K247

5K252

5K219

5K220

A

B

C

D

E

F

G

H

K

L

1-5 Service limits

Summary of Contents for PB-655

Page 1: ...f publication ECHO SERVICE MANUAL Ord No 403 12 contains lots of information for servicing these models 2 CONTENTS page 1 SERVICE INFORMATION 2 1 1 Specification 2 1 2 Technical data 3 1 3 Torque limi...

Page 2: ...gnition 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 Fu...

Page 3: ...e 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 ne...

Page 4: ...15 17 130 150 system Carburettor 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 4 17 35 Engine Crankcase M 5 70 110 7 11 60 95 Cylinder M 5 70 110 7 11 60 95 Engi...

Page 5: ...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 0 393 G Piston ring width Min 1 45 0 057 H Piston ring end ga...

Page 6: ...0 2 pin wrench Removing and installing pawl carrier 13 897719 02830 Piston holder Making piston steady to remove and install piston rings 14 897726 21430 Oil seal tool Installing crankcase oil seal 15...

Page 7: ...carburettor change Idle adjust screw idle and H mixture needles turn for designated engine revolution through procedures indicated here may vary As long as idle and WOT engine speed is set in given r...

Page 8: ...um WOT engine speed just before lean drop off using 2 5mm blade screwdriver 6 Turn hi speed H mixture needle anticlockwise to reduce WOT engine speed 10 20 r min Minimum WOT engine speed after adjusti...

Reviews: