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Stihl MS170 User Manual

Stihl MS170
128 pages
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STIHL MS 170, 180
WARNING To reduce the risk of
kickback injury use STIHL reduced kickback bar
and STIHL low kickback chain as specified in
this manual or other available low kickback
components.
ADVERTENCIA Para reducir el
riesgo de lesionarse como resultado de un
culatazo, utilice la barra y la cadena de
contragolpe reducido de la forma especificada
en este manual o de otros componentes
reductores de contragolpe.
Read Instruction Manual thoroughly before
use and follow all safety precautions –
improper use can cause serious or fatal injury.
Antes de usar la máquina lea y siga todas las precauciones
de seguridad dadas en el manual de instrucciones – el uso
incorrecto puede causar lesiones graves o mortales.
Instruction Manual
Manual de instrucciones
Question and Answer IconNeed help?

Do you have a question about the Stihl MS170 and is the answer not in the manual?

Stihl MS170 Specifications

General IconGeneral
Displacement30.1 cc
Powerhead Weight3.9 kg (8.6 lbs)
Sound Pressure Level100 dB(A)
Engine Power1.7 bhp
Weight8.6 lbs
Fuel Capacity8.5 oz
Chain Oil Capacity145 ml (4.9 fl oz)
Oilomatic Chain Pitch3/8 in
Chain Pitch3/8 in
Guide Bar Length30-35 cm (12-14 in.)

Summary

Guide to Using this Manual

Pictograms

Illustrations representing machine functions and operations.

Symbols in Text

Explanation of text symbols used in operating and safety instructions.

Safety Precautions and Working Techniques

Proper Clothing

Recommendations for appropriate protective apparel for chainsaw operation.

THE USE OF THE CHAIN SAW

Transporting the Chain Saw

Guidelines for safely transporting the chain saw by hand or vehicle.

Fuel

Fueling Instructions

Detailed steps and safety warnings for refueling the chainsaw.

Before Operation

Starting

Holding and Controlling the Chain Saw

On the ground

Method for holding the chainsaw on the ground before starting.

Between knees or thighs

Method for holding the chainsaw between the legs before starting.

Important Adjustments

Working Conditions

Operating Instructions

During the break-in period

Guidelines for operating a new machine during its initial break-in period.

During work

Important notices and recommendations for operation during regular use.

REACTIVE FORCES INCLUDING KICKBACK

Kickback

Explanation of kickback phenomenon and its causes.

Chain Saw Kickback Standard

Devices for Reducing the Risk of Kickback Injury

STIHL Quickstop Chain Brake

Description of the chain brake system and its activation mechanisms.

Low Kickback Saw Chain and Reduced Kickback Bars

Low Kickback Saw Chain

Details on saw chains designed to reduce kickback forces.

Reduced Kickback Bars

Bow Guides

Limbing

Bucking

Felling

Felling Instructions

Escape Path

Buttress Roots

Gunning Sight

Conventional Cut

Open-face Technique

Making Sapwood Cuts

D =Felling Cut

E = Hinge

Felling Cut for Small Diameter Trees: Simple Fan Cut

Felling Cut for Large Diameter Trees

Sectioning Method

Procedure for felling large diameter trees using the sectioning method.

Plunge-cut Method

Procedure for felling large diameter trees using the plunge-cut method.

MAINTENANCE, REPAIR AND STORING

Cutting Attachment

Chain scabbard

Mounting the Bar and Chain (front chain tensioner)

Removing the chain sprocket cover

Steps to remove the chain sprocket cover.

Fitting the chain

Procedure for fitting the saw chain onto the guide bar.

Releasing the chain brake

Fitting the saw chain

Tensioning the Saw Chain (front chain tensioner)

Tensioning the Saw Chain (quick chain tensioner)

Checking Chain Tension

Fuel

Fueling

Preparations

Steps to prepare the chainsaw before fueling.

Change the fuel pickup body

Chain Lubricant

Filling Chain Oil Tank

Preparations

Steps to prepare for filling the chain oil tank.

Chain Brake

Locking chain with chain brake

How to engage the chain brake for stopping chain rotation.

Releasing the chain brake

How to disengage the chain brake.

Starting / Stopping the Engine

Positions of Master Control Lever

Description of the Master Control Lever positions.

Setting the Master Control Lever

Instructions for moving the Master Control Lever.

Holding the Saw

On the ground

Method for holding the chainsaw on the ground before starting.

Between knees or thighs

Method for holding the chainsaw between the legs before starting.

Cranking

Standard versions

Procedure for cranking the engine on standard models.

Versions with Easy2Start

Starting the Saw

Operating Instructions

During the break-in period

Guidelines for operating a new machine during its initial break-in period.

During work

Important notices and recommendations for operation during regular use.

Stopping the Engine

If engine does not start

Chain cold

Chain at operating temperature

After a long period of full-throttle operation

After finishing work

Taking Care of the Guide Bar

Shroud

Removing the shroud

Steps for removing the engine shroud.

Refitting the shroud

Steps for reinstalling the engine shroud.

Cleaning the Air Filter

Engine Management

Adjusting the Carburetor

Basic information

General information about the factory-adjusted carburetor.

Standard setting

Procedure for setting the carburetor to standard specifications.

Setting the idle speed

Instructions for adjusting the engine idle speed correctly.

Spark Arresting Screen in Muffler

Spark Plug

Checking the Spark Plug

Procedure for inspecting and cleaning the spark plug.

Removing the spark plug

Steps for safely removing the spark plug.

Installing the spark plug

Rewind Starter

Storing the Machine

Checking and Replacing the Chain Sprocket

Maintaining and Sharpening the Saw Chain

Chain pitch

Sharpening and side plate angles

A Sharpening angle

Specifies the correct sharpening angle for saw chains.

B Side plate angle

Describes the correct side plate angle for saw chains.

File holder

Proper sharpening

Depth gauge setting

Lowering the depth gauges

Procedure for adjusting depth gauges after sharpening.

Sharpening tools (special accessories)

Maintenance and Care

Complete machine

Overall inspection and cleaning of the complete machine.

Chain brake

Maintenance checks and intervals for the chain brake system.

Saw chain

Maintenance checks for the saw chain, including tension and sharpness.

Guide bar

Maintenance for the guide bar, including cleaning and turning.

Main Parts

Definitions

Specifications

EPA / CEPA

Emission compliance period information for EPA/CEPA standards.

CARB

Emission compliance period definitions for CARB standards.

Engine

Technical specifications for the STIHL single cylinder two-cycle engine.

Cutting Attachments

Recommended cutting attachments conforming to kickback standards.

Saw chain 3/8" P – MS 170

Saw chain 3/8" P – MS 180

Chain sprocket

Special Accessories

Ordering Spare Parts

Maintenance and Repairs

Disposal

STIHL Incorporated Federal Emission Control Warranty Statement

Not for California

Warranty statement specific to emissions control for non-California regions.

Manufacturer's Warranty Coverage

Owner's Warranty Responsibilities

Coverage by STIHL Incorporated

Warranty Period

Diagnosis

Warranty Work

STIHL Incorporated California Exhaust and Evaporative Emissions Control Warranty Statement

For California only

Warranty statement specific to emissions control for California.

Your Warranty Rights and Obligations

Maintenance Requirements

Limitations

Trademarks

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