Yamabiko ECHO PB-2520 User Manual

Ref. No. 403-20
(Serial number: 37000001 and after)
Copyright(C)2018 YAMABIKO Corporation All rights reserved.
PB-2520
ECHO:
shindaiwa:
EB252

Yamabiko ECHO PB-2520 Specifications

General

Engine Type	2-stroke
Displacement	25.4 cc
Air Volume	453 CFM
Air Speed	170 MPH
Weight	8.6 lbs
Type	Handheld
Power Source	Gasoline
Sound Pressure Level	70 dB(A)

Summary

Service Information

1-3 Torque Limits

Specifies torque values for various fasteners and components.

1-5 Service Limits

Defines component wear limits and measurement specifications.

Starter System

2-1 Disassembling Starter Assembly

Step-by-step guide to disassembling the starter mechanism.

2-2 Replacing Starter Rope

Instructions for correctly replacing the starter rope.

2-3 Installing Rewind Spring

Procedure for safely installing the starter rewind spring.

2-4 Assembling Starter

Ignition System

4-1 Troubleshooting Guide

Flowchart for diagnosing common ignition system problems.

4-2 Testing Spark and 4-3 Inspecting Spark Plug

Procedures for testing spark and inspecting/gapping the spark plug.

4-5 Inspecting Ignition Module

4-6 Replacing Ignition Module

Detailed procedure for replacing the ignition module.

4-7 Setting Pole Shoe Air Gaps and 4-8 Inspecting Ignition Switch

4-10 Inspecting Flywheel Magnetic Force and 4-11 Replacing Flywheel and Key

Fuel System

6-3 Inspecting Fuel Tank and Line

6-5 Replacing Fuel Lines, Vent Lines, and Grommet

6-6 Adjusting Carburetor and Initial Settings

General rules and initial settings for carburetor adjustment.

6-6-3 Adjusting Carburetor

Detailed steps for fine-tuning carburetor adjustments.

6-7 Testing Carburetor

Steps for testing the carburetor for leaks and proper function.

6-8 Inspecting Crankcase Pulse Passage and 6-9 Metering Lever Height

6-10 Inspecting Inlet Needle Valve and 6-11 Inspecting Diaphragm

6-12 Installing Carburetor

Engine

7-1 Testing Cylinder Compression and 7-2 Cleaning Cooling Air Passages

7-4 Testing Crankcase and Cylinder Sealings

How to test for leaks in the crankcase and cylinder sealings.

7-5 Replacing Oil Seals and 7-6 Inspecting Cylinder

7-7 Inspecting Piston/Piston Rings and 7-8 Disassembling Crankcase

7-9 Replacing Ball Bearing

7-10 Assembling Crankshaft/Crankcase and 7-11 Installing Piston

7-12 Installing Piston Ring and Cylinder

7-13 Assembling Engine Assembly and Other Parts

Instructions for final assembly of the engine and related parts.

Maintenance Guide

8-2 Troubleshooting Guide (Engine Systems)

A guide to diagnose and resolve common engine problems.

8-2 Troubleshooting Guide (Fuel/Blower)

Troubleshooting for fuel system, engine, and blower issues.