Stihl RMA 443 User Manual (English)

Questions and Answers:

W
wolfebruceAug 3, 2025
How to extend the battery life of my Stihl Lawn Mower?
- D
  Daniel ThomasAug 3, 2025
  If your Stihl Lawn Mower operating time is too short, it could be due to several factors. The battery may not be fully charged, so fully charge it. The battery's service life might be exceeded, meaning it's time to replace it. The area around the blade could be blocked, so clean the lawn mower. A blunt or worn blade can also reduce operating time, so sharpen and balance the blade. Finally, too much resistance at the blade can be the issue; set a higher cutting height and mow shorter grass.
J
joshuahamiltonAug 9, 2025
What to do if my Stihl RMA 443 Lawn Mower stops while mowing?
- M
  Matthew WatsonAug 9, 2025
  Your Stihl Lawn Mower might stop during operation for a few reasons. It could be overheating; if so, pull out the activation key, remove the battery, let it cool down, clean it, avoid frequent starts, set a higher cutting height, and mow shorter grass. The blade might be blocked; in that case, pull out the activation key, remove the battery, and clean the lawn mower. Also, there could be an electrical fault; try removing and refitting the battery, then switch the lawn mower back on.
M
Melissa LevyAug 15, 2025
Why is my Stihl Lawn Mower vibrating so much?
- W
  williamestesAug 15, 2025
  Excessive vibration in your Stihl Lawn Mower can be due to a loose blade fastening screw. Make sure to tighten the screw. Also, the blade may not be correctly balanced. In this case, you should sharpen and balance the blade.
S
Stephen ThomasAug 20, 2025
Why isn't my Stihl RMA 443 cutting grass evenly?
- C
  Crystal MyersAug 20, 2025
  If the grass is not cut cleanly or the lawn appears yellow after mowing with your Stihl Lawn Mower, it could be due to a blunt or worn blade. Sharpen and balance the blade. Another reason might be too much resistance at the blade. Try setting a higher cutting height and mowing shorter grass.

Stihl RMA 443 Specifications

General

Type	Walk behind lawn mower
Noise level	90 dB
Cutting width	410 mm
Grass catcher	Yes
Product color	Orange
Uncertainty K	1.1 m/s²
Rotational speed	3150 RPM
Maximum lawn area	- m²
Mulching function	-
Vibration emission	2.2 m/s²
Maximum cutting height	75 mm
Minimum cutting height	25 mm
Grass collecting volume	55 L
Number of height positions	5
International Protection (IP) code	IPX4
Battery type	Built-in battery
Power source	Battery

Weight and Dimensions

Weight	20000 g

Summary

Notes on the Instruction Manual

General Manual Information

This section explains the purpose of the manual and STIHL's product development policy.

Reading the Instruction Manual

Guidance on how to interpret illustrations and texts within the manual for clarity.

Machine Overview

For Your Safety

General Safety Guidelines

Essential safety regulations and user responsibility for operating the machine safely.

Clothing and Equipment

Recommendations for appropriate footwear, clothing, and protective gear during operation.

Battery Safety Precautions

Safety measures for handling, protecting, and maintaining the battery to prevent hazards.

Charger Safety Precautions

Safety guidelines for operating and handling the battery charger to avoid electrical risks.

Charging Procedures

Instructions and precautions for safely charging the battery, including time and status indicators.

Machine Transport Safety

Guidelines for safely carrying and securing the lawn mower during transport.

Battery Transport Safety

Safety precautions and methods for transporting the battery, adhering to hazardous goods rules.

Before Operation Checks

Essential checks and preparations required before using the machine for safe operation.

Safe Working Practices

Key safety practices to follow while operating the lawn mower, including environmental awareness.

Maintenance, Cleaning & Storage

Procedures for maintaining, cleaning, repairing, and storing the machine to ensure longevity.

Long-Term Storage Procedures

Specific guidance for storing the machine, battery, and charger during off-season periods.

Proper Disposal Instructions

Instructions for the proper and environmentally friendly disposal of the machine and its components.

Description of Symbols

Standard Equipment

Preparing the Machine for Operation

General Preparation Points

Basic safety checks and initial setup requirements before operating the lawn mower.

Installing the Mono Comfort Handlebar

Step-by-step guide for installing the mono comfort handlebar on compatible models.

Installing the Dual Handlebar (RMA 443)

Instructions for assembling the dual handlebar specifically for the RMA 443 model.

Assembling the Grass Catcher Box

Guide on how to assemble and attach the grass catcher box to the lawn mower.

Battery and Charger

General Battery and Charger Information

Overview of battery compatibility, machine electronics, and general charger information.

Connecting Charger to Mains

Steps for connecting the battery charger to the power supply and initial self-test.

Removing and Inserting the Battery

Instructions for safely handling the battery, including removal and insertion procedures.

Recharging the Battery

Detailed guide on how to recharge the battery, including charging times and status.

Battery LED Indicators

Explanation of the status indicators on the battery and their meanings.

Charger LED Indicator

Explanation of the status indicator light on the battery charger and fault indications.

Controls

Safety Plug Function

Information on the function and importance of the safety plug for safe operation.

Eco Mode Switch

How to activate and deactivate the eco mode for energy efficiency and extended runtime.

Grass Catcher Box Attachment

Instructions for attaching and detaching the grass catcher box to the lawn mower.

Adjusting Mono Comfort Handlebar

Guide to adjusting the handlebar height and position for optimal user comfort.

Folding Dual Handlebar (RMA 443)

Steps for folding the dual handlebar for transport, storage, or cleaning.

Central Cutting Height Adjustment

How to adjust the lawn mower's cutting height to six different levels.

Grass Catcher Level Indicator

Explanation of the level indicator that shows the fill status of the grass catcher.

Notes on Working with the Machine

General Mowing Tips

General tips for optimal lawn mowing, grass care, and blade maintenance.

Cutting Performance Factors

Factors influencing cutting performance and battery life, including eco mode.

Operator Working Area Safety

Safety guidelines regarding the operator's position and keeping bystanders out of the danger area.

Correct Motor Load Management

Advice on avoiding motor overload and maintaining proper speed when mowing.

Mowing Blade Blockage Procedure

Procedure to follow if the mowing blade becomes blocked, including safety steps.

Thermal Motor Overload Protection

Explanation of the motor's thermal overload protection system and causes of overload.

Safety Devices Overview

Safety Plug Importance

Importance and function of the safety plug for safe operation and maintenance.

Machine Safety Features

Overview of built-in safety features preventing contact with moving parts and ejected clippings.

Two-Hand Operation Requirement

Explanation of the mandatory two-hand control system required for starting the motor.

Motor Run-Down Brake Function

Description of the integrated brake that stops the mowing blade quickly after motor shutdown.

Operating the Machine

Preparatory Measures Before Operation

Essential steps to take before starting the machine, including battery and safety plug.

Switching the Lawnmower On

Step-by-step guide on how to start the lawn mower safely.

Switching the Lawnmower Off

Instructions for safely stopping the lawn mower and its motor.

Self-Propulsion Operation

How to engage and disengage the self-propulsion feature on relevant models.

Emptying the Grass Catcher Box

Procedure for safely emptying the grass catcher box of clippings.

Maintenance Procedures

General Maintenance Guidelines

General advice and recommended schedule for machine maintenance.

Cleaning the Machine

Instructions for cleaning the lawn mower after use, including specific areas.

Electric Motor and Wheels Maintenance

Information on maintenance for the electric motor and wheel bearings.

Battery Maintenance

Maintenance recommendations for the battery, including cleaning and visual checks.

Charger Maintenance

Maintenance advice for the battery charger, focusing on cable and air slots.

Checking Blade Wear

How to check the mowing blade for wear, damage, and minimum thickness.

Removing and Installing Mowing Blade

Step-by-step guide for safely removing and installing the mowing blade.

Sharpening the Mowing Blade

Instructions for sharpening the mowing blade correctly, including angles and wear limits.

Storage for Winter Break

Guidance on storing the machine, battery, and charger for winter to ensure longevity.

Transporting the Machine

Carrying and Securing the Lawnmower

Instructions for safely carrying and securing the lawn mower during transport.

Transporting the Battery Safely

Safety precautions and methods for transporting the battery, adhering to hazardous goods rules.

Minimising Wear and Preventing Damage

Identifying Wearing Parts

Identification of parts subject to normal wear and requiring timely replacement.

Compliance with Manual Instructions

Emphasizes user responsibility for following manual instructions to prevent damage.

Importance of Maintenance Operations

Reinforces the importance of performing regular maintenance operations for machine longevity.

Environmental Protection

Standard Spare Parts

EU Declaration of Conformity

Lawn Mower Conformity Declaration

Official declaration of the machine's compliance with relevant EC directives and standards.

STIHL Charger AL Conformity

Official declaration of the STIHL AL charger's compliance with relevant directives.

Technical Specifications

STIHL AP Battery Specifications

Detailed technical specifications for the STIHL AP battery, including voltage and temperature range.

STIHL Charger AL Specifications

Detailed technical specifications for the STIHL AL charger, including voltage and protection class.

REACH Information

Information regarding REACH registration, evaluation, authorization, and restriction of chemicals.

Troubleshooting Common Issues

Motor Not Starting Troubleshooting

Steps to diagnose and resolve issues when the motor fails to start.

Motor Stopping During Operation Troubleshooting

Solutions for problems causing the motor to stop during use, such as overheating.

Excessive Vibration Troubleshooting

Troubleshooting steps for addressing unusual vibration issues, often blade-related.

Poor Cut or Lawn Yellowing Troubleshooting

Diagnosing and fixing causes of poor cutting performance or lawn discoloration.

Battery Insertion Issues Troubleshooting

Guidance on resolving issues with battery insertion into the compartment, like dirt.

Charging Issues Troubleshooting

Troubleshooting steps for charging problems, including LED indicators and battery temperature.

Service Schedule

Handover Confirmation Record

Form to record machine handover details, serial number, and next service date.

Service Confirmation Record

Section for service personnel to confirm maintenance operations performed on the machine.

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