Stihl RM 443 - User Manual

Questions and Answers

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Gilbert BarnesAug 5, 2025
Why won't my Stihl Lawn Mower engine start?
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  jason27Aug 5, 2025
  If your Stihl Lawn Mower engine won't start, several factors could be at play. Ensure the control bar for mowing is properly engaged as described in the instruction manual. Check if the fuel tank is empty and refuel if necessary. Also, make sure the spark plug socket is securely connected and the ignition lead is properly fastened. For blocked fuel lines or a dirty filter, it's best to consult a STIHL specialist dealer. If there's dirty or old fuel in the tank, replace it with fresh, good-quality unleaded petrol.
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Geoffrey ChangAug 12, 2025
What to do if my Stihl Lawn Mower engine is difficult to start?
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  Michelle MitchellAug 12, 2025
  If your Stihl Lawn Mower engine is hard to start, losing power, or overheating, start by checking if the lawn mower housing is blocked and clean it if necessary. Ensure the cutting height isn't too low, and adjust it or mow more slowly. If there's water or contamination in the fuel tank, empty the tank and clean the fuel line and carburetor. A dirty spark plug can also cause these issues, so clean or replace it. Also, check the engine oil level and add or change it as detailed in the engine instruction manual. Finally, make sure the cooling ribs are clean.
A
Andrea SmithAug 19, 2025
How to fix Stihl RM 443 Lawn Mower not cutting grass cleanly?
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  Sheena DavisAug 19, 2025
  If your Stihl Lawn Mower isn't cutting grass cleanly, the blade may be blunt or worn. Sharpen or replace the blade to resolve this issue.
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lindseybellAug 27, 2025
Why is my Stihl RM 443 vibrating so much?
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  mullinsjulieAug 28, 2025
  Excessive vibration in your Stihl Lawn Mower can be due to a damaged or incorrectly attached blade. If the blade is damaged, replace it. If the blade is not correctly attached, ensure it is properly secured.

Summary

Machine Overview

For Your Safety

General

Covers essential safety regulations, user responsibilities, intended use, and prohibited applications.

Refilling the Tank - Handling Petrol

Details safe procedures for refueling, including warnings about petrol hazards.

Before Operation

Lists critical pre-operation checks for safety, assembly, and machine condition.

Working with Your Machine

Covers safe operation practices, including working with animals, safety devices, and general operating conditions.

Maintenance and Repairs

Details procedures for cleaning, routine maintenance, and general care of the machine.

Preparing the Machine for Operation

Installing the Mono Handlebar

Provides step-by-step instructions for fitting the mono handlebar onto specific mower models.

Installing the Dual Handlebar

Details the process of installing the dual handlebar for specific lawn mower models.

Fuel and Engine Oil

Controls

Central Cutting Height Adjustment

Safety Devices

Lists the safety features integrated into the lawn mower to prevent misuse.

Motorstop Lever

Explains the function of the motorstop lever and how to check the blade run-on time.

Notes on Working with the Machine

Working Area for Operator

Operating the Machine

Starting the Engine

Provides step-by-step instructions for starting the engine, including tips for difficult starts.

Stopping the Engine

Self-Propulsion

Maintenance

Engine

Checking Blade Wear

Explains how to check for blade wear and replacement limits to prevent injuries.

Removing and Installing the Mowing Blade

Details the procedure for safely removing and installing the mowing blade.

Sharpening the Mowing Blade

Transport

Minimising Wear and Preventing Damage

Technical Specifications

Stihl RM 443 Specifications

General

Type	Walk behind lawn mower
Motor type	V-twin cylinders OHV
Cutting width	410 mm
Grass catcher	Yes
Product color	Black, Orange, White
Uncertainty K	2.05 m/s²
Cutting system	Rotary blades
Number of wheels	4 wheel(s)
Rotational speed	2800 RPM
Maximum lawn area	1200 m²
Sound power level	94 dB
Handle(s) features	Soft grip
Vibration emission	4.1 m/s²
Engine displacement	140 cm³
Sound pressure level	2 dB
Maximum cutting height	75 mm
Minimum cutting height	25 mm
Grass collecting volume	55 L
Number of height positions	6
Motor power	2.8 hp
Engine power	2100 W
Power source	Gasoline