Stihl 088

STIHL 088 1
CONTENTS
1. Introduction 2
2. Specifications 3
2.1 Engine 3
2.2 Fuel System 3
2.3 Ignition System 4
2.4 Cutting Attachment 4
2.5 Special Accessories 5
2.5.1 For User 5
2.5.2 For Service 5
2.6 Tightening Torques 5
3. Clutch, Chain Drive,
Chain Brake and
Chain Tensioner 7
3.1 Clutch Drum/
Chain Sprocket 7
3.2 Clutch 8
3.3 Chain Brake 9
3.3.1 Disassembly 9
3.3.2 Assembly 10
3.3.3 Checking Function 12
3.3.4 Brake Spring
Anchor Pin 13
3.3.5 Hand Guard Pivot Pin 13
3.4 Chain Tensioner 14
4. Engine 15
4.1 Exhaust Muffler/
Spark Arresting Screen 15
4.2 Leakage Test 16
4.2.1 Preparations 16
4.2.2 Pressure Test 17
4.2.3 Vacuum Test 18
4.3 Oil Seals 19
4.4 Exposing the Cylinder 20
4.5 Cylinder and Piston 20
4.5.1 Removal 20
4.5.2 Installation 21
4.6 Piston Rings 24
4.7 Crankcase 24
4.7.1 Removing the
Crankshaft 24
4.7.2 Installing the
Crankshaft 28
4.8 Decompression Valve 32
5. Ignition System 33
5.1 Ignition Module 33
5.1.1 Ignition Timing 34
5.1.2 Removing and
Installing 34
5.2 Spark Plug Boot/
Ignition Lead 35
5.3 Flywheel 36
5.4 Ground Wire/
Short Circuit Wire 37
5.5 Contact Spring 37
6. Rewind Starter 38
6.1. General 38
6.2 Rewind Spring 38
6.2.1 Replacing 38
6.2.2 Tensioning 39
7. AV Handle System 40
8. Master Control/
Handle System 41
8.1 Switch Shaft 41
8.2 Throttle Trigger/
Interlock Lever 42
9. Chain Lubrication 43
9.1 Pickup Body/
Suction Hose 43
9.2 Valve 44
9.3 Spur Gear 44
9.4 Oil Pump 45
9.4.1 Removing and
Installing 45
9.4.2 Servicing 45
STIHl
© 1996. Andreas Stihl. Waiblingen
10. Fuel System 47
10.1 Air Filter 47
10.2 Carburetor 48
10.2.1 Removing and
Installing 48
10.2.2 Leakage Test 49
10.2.3 Adjustment 50
10.3 Tank Vent 51
10.4 Pickup Body 51
10.5 Fuel Hoses 52
10.6 Tank Housing 53
11. Special Servicing
Tools and Aids 56
11.1 Special Servicing Tools 56
11.2 Servicing Aids 58

Stihl 088 Specifications

General

Brand	Stihl
Model	088
Category	Chainsaw
Language	English

Summary

Introduction

Servicing Information and Tools

Covers special tools, assembly stand, and use of genuine STIHL parts.

Document Symbols and Markings

Explains symbols used in text and illustrations for clarity.

Specifications

Engine and Fuel System Specifications

Details engine displacement, power, fuel system settings, and requirements.

Ignition and Cutting Attachment Specifications

Covers ignition system details and cutting attachment specs like bar and chain types.

Special Accessories and Tightening Torques

Accessories for User and Service

Lists repair kits and parts kits available for users and service technicians.

Tightening Torque Specifications

Provides torque values for various fasteners, including plastoform screws.

Plastoform Screw Refitting and Polymer Care

Refitting procedures for plastoform screws and polymer component care.

Clutch, Chain Drive, Chain Brake, and Chain Tensioner

Clutch Drum and Chain Sprocket

Steps for removing and inspecting the clutch drum and chain sprocket.

Clutch Assembly Procedures

Instructions for removing and installing the clutch.

Chain Brake Disassembly and Assembly

Detailed procedures for taking apart and putting back together the chain brake.

Chain Brake Function Check

How to verify the correct operation of the chain brake.

Chain Tensioner Service

Procedures for removing, disassembling, and reassembling the chain tensioner.

Engine

Exhaust Muffler and Spark Arresting Screen

Removal and service of the muffler and spark arresting screen.

Crankcase Leakage Tests

Preparations for, and execution of, pressure and vacuum tests.

Oil Seals Replacement

Instructions for removing and installing oil seals on starter and clutch sides.

Cylinder and Piston Service

Covers removal and installation of the cylinder and piston assembly.

Crankcase Separation

Details separating crankcase halves and removing components.

Crankshaft Installation

Steps for installing the crankshaft, including bearing and component fitting.

Decompression Valve Service

Removal and installation procedure for the decompression valve.

Ignition System

Ignition Module Overview

Description and function of the ignition module.

Ignition Timing and Module R&I

Fixed timing and steps for ignition module removal/installation.

Spark Plug Boot and Ignition Lead Procedures

Procedures for handling the spark plug boot and ignition lead.

Flywheel Service

Instructions for removing and installing the flywheel.

Ground Wire, Short Circuit Wire, and Contact Spring

Procedures for handling wires and the contact spring.

Rewind Starter

General Starter Rope Issues

Common issues with starter rope stiffness and rewind mechanism.

Rewind Spring Service

Steps for replacing and tensioning the rewind spring.

AV Handle System

Annular Buffer Replacement

Removal and installation of annular buffers in the AV handle system.

Master ControlHandle System

Switch Shaft Operation

Operation of the switch shaft via the Master Control lever.

Throttle Trigger and Interlock Lever Service

Procedures for removing and installing the throttle trigger and interlock lever.

Chain Lubrication

Pickup Body and Suction Hose Maintenance

Cleaning and servicing the oil pickup body and suction hose.

Tank Vent Valve and Spur Gear Service

Maintenance of the tank vent valve and spur gear.

Oil Pump Service and Installation

Procedures for removing, installing, and servicing the oil pump.

Fuel System

Air Filter Service

Cleaning, servicing, and replacing the air filter.

Carburetor Service and Leakage Test

Steps for removing, installing, and testing the carburetor for leaks.

Carburetor Adjustment Procedures

Guide to adjusting idle and high-speed fuel mixture.

Tank Vent, Pickup Body, and Fuel Hoses

Maintenance of the tank vent, pickup body, and fuel hoses.

Tank Housing Removal

Procedures for draining and removing the tank housing.

Special Servicing Tools and Aids

Special Servicing Tools Listing

Lists various tools and their specific applications in servicing.

Servicing Aids Listing

Lists lubricants, degreasants, and threadlockers used in maintenance.