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Stihl FS 91 R

Stihl FS 91 R
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STIHL FS 91, 91 R
WARNING
Read Instruction Manual thoroughly
before use and follow all safety
precautions – improper use can
cause serious or fatal injury.
ADVERTENCIA
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

Table of Contents

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Stihl FS 91 R Specifications

General IconGeneral
TypeString trimmer
CordlessYes
Head typeNylon line
Handle typeD-loop handle
Engine power1.3 hp
Product colorBlack, Metallic, Orange
Uncertainty K2 m/s²
Rotational speed8000 RPM
Number of strokes4
Sound power level107 dB
Fuel tank capacity0.71 L
Vibration emission3.7 m/s²
Engine displacement28.4 cm³
Sound pressure level96 dB
Cutting diameter (max)- mm
Power sourceGasoline
Weight and Dimensions IconWeight and Dimensions
Length1800 mm
Weight5500 g

Summary

Safety Precautions and Working Techniques

Physical Condition

Operator must be in good physical and mental health.

Proper Clothing

Recommendations for protective apparel to reduce injury risk.

Fueling Instructions

Steps and precautions for safely fueling the machine.

Before Operation

Checks and precautions before starting the power tool.

Operating Instructions

General instructions for operating the tool safely.

Risk of Kickout (Blade Thrust)

Explanation of kickout with rigid cutting blades and how to avoid it.

Approved Combinations of Cutting Attachment, Deflector, Limit Stop, Handle, Harness

Mounting the Bike Handle

Mounting Bike Handle with Swiveling Handle Support

Instructions for attaching the bike handle with swiveling support.

Mounting the Control Handle

Mounting the Loop Handle

Mounting the Loop Handle without Barrier Bar

Fitting the Carrying Ring

Mounting the Cutting Attachment

Mounting Hardware for Cutting Attachments

Details on mounting hardware for attachments.

Blocking the Shaft

Remove the mowing head.

Mounting Metal Cutting Attachments

Fuel

Fuel mix ages

Guidance on mixing fuel and oil for the engine.

Fueling

Preparations

Steps to prepare the machine before fueling.

Opening

Procedure for safely opening the fuel tank cap.

Full Harness

Balancing the Machine

How to balance the machine for optimal use.

Starting Stopping the Engine

Starting the Engine

Crankings

Detailed steps for cranking the engine to start it.

Stopping the Engine

Operating Instructions

During break-in period

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

Replacing the Air Filter

Adjusting the Carburetor

Factory settings and adjustment of the carburetor.

Spark Arresting Screen in Muffler

Lubricating the Gearbox

Balancing

Replacing Cutting Blades

Maintenance and Care

STIHL Incorporated Federal Emission Control Warranty Statement

STIHL Incorporated California Exhaust and Evaporative Emissions Control Warranty Statement

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