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Stihl MS 251 User Manual

Stihl MS 251
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STIHL MS 251
Instruction Manual
Manual de instrucciones
Read and follow all safety precautions in
Instruction Manual – improper use can cause
serious or fatal injury.
Lea y siga todas las precauciones de
seguridad dadas en el manual de
instrucciones – el uso incorrecto puede causar
lesiones graves o mortales.
WARNING
To reduce the risk of kickback injury
use STIHL reduced kickback bar and
STIHL PM3, PS3, PD3 (3/8" Picco) or RM3,
RD3 (0.325") chain depending on sprocket
pitch or other available low kickback
components.
ADVERTENCIA
Para reducir el riesgo de lesionarse
como resultado de un culatazo, utilice
la barra de contragolpe reducido y la cadena
PM3, PS3, PD3 (Picco de 3/8 pulg) o RM3,
RD3 (0,325 pulg) de STIHL, dependiendo de
la rueda dentada usada y de otros
componentes reductores de contragolpe.

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Do you have a question about the Stihl MS 251 and is the answer not in the manual?

Stihl MS 251 Specifications

General IconGeneral
Idle speed2800 RPM
Motor type2-stroke motor
Chain pitch1/308 \
Blade length450 mm
Product colorBlack, Grey, Orange
Motor speed (max)10000 RPM
Oil tank capacity0.2 L
Fuel tank capacity0.39 L
Engine displacement45.6 cm³
Kickback protectionYes
Engine power3 hp
Power sourceGasoline
Sound power level114 dB
Vibration emission3.9 m/s²
Sound pressure level103 dB
Weight and Dimensions IconWeight and Dimensions
Weight4900 g

Summary

Guide to Using this Manual

Safety Precautions and Working Techniques

Essential safety measures and operational guidelines for using the chainsaw to prevent injury.

Safety Precautions and Working Techniques

Reactive Forces and Kickback

Understanding and managing forces like kickback, pushback, and pull-in to prevent loss of control.

Fuel and Fueling

Before Starting and Starting

Holding and Controlling the Power Tool

Proper grip and hand positioning on the handles for maximum control during operation.

Reactive Forces and Kickback

Kickback Mechanics

Explanation of common reactive forces like kickback, pushback, and pull-in.

Reducing Kickback Risk

Methods and devices, like the Quickstop chain brake, to minimize kickback injury.

Low Kickback Chains and Bars

Information on STIHL's low kickback chains and reduced kickback bars for safety.

Avoiding Kickback

Key techniques and practices to prevent kickback situations entirely.

Cutting Techniques

Cutting Attachment

Mounting the Bar and Chain (side chain tensioner)

Mounting the Bar and Chain (quick chain tensioner)

Tensioning the Saw Chain (side chain tensioner)

Tensioning the Saw Chain (quick chain tensioner)

Checking Chain Tension

Fuel and Lubrication

Fueling Procedures

Chain Brake

Starting / Stopping the Engine

Operating Instructions

Taking Care of the Guide Bar

Air Filter System

Engine Management

Spark Plug

Replacing the Starter Rope and Rewind Spring

Maintaining and Sharpening the Saw Chain

Maintenance and Care

Specifications

Maintenance and Repairs

STIHL Incorporated Federal Emission Control Warranty Statement

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