STIHL BG-KM CombiSystem Blower Attachment

Introduction

This document is the operating manual for the STIHL BG-KM CombiSystem blower attachment. The STIHL CombiSystem allows for the combination of different CombiMotors and CombiTools to create a complete power unit. The functional unit of a CombiMotor and CombiTool is referred to as the power unit or machine in this manual. The operating instructions for the CombiMotor and the CombiTool together form the complete operating instructions for the power unit. Always read both operating instructions carefully before first use and keep them safe for future reference.

The manual is available in Dutch (Handleiding), French (Notice d'emploi), and German (Gebrauchsanleitung).

Image Description: The STIHL BG-KM is a blower attachment designed to be used with STIHL CombiMotors. It features a grey housing with the STIHL logo, a black nozzle at one end, and connects to a motor unit via a shaft and coupling mechanism.

Safety Instructions and Work Technique

Special safety measures are necessary when working with a power unit. Always read both operating instructions (CombiMotor and CombiTool) carefully before first use and keep them for future reference. Failure to observe the instructions can be life-threatening.

Only lend or allow persons familiar with this model and its operation to use the power unit, always providing them with the CombiMotor and CombiTool operating instructions. The blower is suitable for clearing leaves, grass, paper, snow, etc., in areas like parks, sports fields, parking lots, or driveways, and for clearing forest paths. It is forbidden to use the power unit for other purposes, as this poses a risk of accidents.

Only install parts or accessories approved by STIHL for this power unit or technically equivalent parts. Contact an authorized dealer if you have questions.

Only use high-quality parts or accessories. Otherwise, there is a risk of accidents or damage to the power unit. STIHL recommends using original STIHL parts and accessories, as their characteristics are optimally matched to the product and user requirements.

Do not make any modifications to the unit, as this could compromise safety. STIHL is not liable for personal injury or material damage caused by the use of unauthorized attachments.

Do not use a high-pressure cleaner for cleaning the unit; the strong water jet can damage parts.

Clothing and Equipment

Wear prescribed clothing and equipment. Clothing must be functional and allow for complete freedom of movement. Wear close-fitting clothing, e.g., a coverall, but not a work coat. Do not wear clothing, scarves, ties, or jewelry that could be drawn into the air intake. Tie back long hair (headscarf, cap, helmet, etc.). Wear sturdy shoes with non-slip soles.

⚠️ WARNING: To reduce the risk of eye injury, wear close-fitting safety goggles conforming to EN 166. Ensure the goggles fit properly. Wear personal hearing protection, e.g., earmuffs. STIHL offers a comprehensive range of personal protective equipment.

Transporting the Power Unit

Always switch off the engine. When transporting in a vehicle, secure the power unit against tipping over, damage, and fuel leakage.

Before Starting

Check that the power unit is in safe operating condition. Refer to the relevant chapter in the CombiMotor and CombiTool operating instructions:

• Wear on the blower housing (cracks, chips) can lead to injury from ejected foreign objects.
• If the blower housing is damaged, contact an authorized dealer. STIHL recommends contacting an STIHL dealer.
• Do not make any modifications to the controls or safety devices.
• Handles must be clean and dry, free of oil and dirt – essential for safe operation of the power unit.

The power unit must only be operated in technically sound condition – risk of accidents! In case of emergency when using a harness, practice quick release. Do not throw the unit on the ground during practice to avoid damage. See also the "Before Starting" instructions in the CombiMotor operating instructions.

During Work

Never blow in the direction of other persons or animals – the unit can throw small objects at high speed – risk of injury! In case of imminent danger or emergency, switch off the engine immediately – move the combi-slider / stop switch / stop button to STOP or 0. Keep a distance of at least 5 meters (16 ft) from other persons – risk of injury from thrown objects! Maintain this distance from vehicles, windows, etc., to avoid material damage!

The power unit produces toxic exhaust gases as soon as the engine is running. These gases can be odorless and invisible, containing unburned hydrocarbons and benzene. Never operate the unit in enclosed or poorly ventilated spaces, even with catalytic converters.

Never leave the unit running unattended. Be cautious on slippery surfaces, in rain, snow, ice, on slopes, or uneven terrain – risk of slipping! When blowing in open areas or gardens, be mindful of pets to avoid endangering them. Catalytic converter mufflers can become very hot. Dust stirred up during work can be harmful to health. Wear a dust mask if dust is generated. When using hearing protection, be extra careful and attentive, as warning sounds (shouts, signals, etc.) are less audible.

After work, place the unit on a level, non-flammable surface. Do not place it near easily flammable materials (e.g., wood chips, bark, dry grass, fuel) – fire hazard! If the unit has been subjected to abnormal stress (e.g., impact or fall), check its safe operating condition before restarting – see "Before Starting" instructions in the CombiMotor manual. Specifically check the proper functioning of safety devices. Never continue to use power units that are no longer safe to operate. If in doubt, contact an authorized dealer.

Using the Unit

Always hold the power unit firmly with both hands on the handles. Right hand on the control handle, left hand on the handle on the shaft – this applies to left-handers too. Firmly grip the handles with your thumbs.

⚠️ WARNING: Only operate the unit with the blower tube fully assembled – risk of injury!

Always move forward slowly – keep the blower tube outlet in view at all times – do not walk backward – risk of tripping! When blowing in open areas and gardens, pay attention to ground-dwelling wildlife. The unit can be carried on a strap (optional accessory, depending on country) that supports the machine's weight.

Work Technique

Minimizing Blowing Time

To minimize blowing time, use a rake or broom to loosen debris before blowing.

Recommended Work Technique for Minimizing Air Pollution:

• If necessary, moisten the surface to be blown to prevent excessive dust formation.
• Do not blow debris towards people, especially children, pets, open windows, or freshly washed cars. Blow debris carefully so it does not pose a risk to others.
• Collect swept debris in a waste container; do not blow it onto neighbors' property.

Recommended Work Technique for Minimizing Noise:

• Operate power units only during reasonable hours – avoid working early in the morning, late at night, or during siesta time when people might be disturbed. Observe local regulations specifying working hours for noisy equipment.
• Run blower engines at the lowest possible speed sufficient for the task.
• Before use, check the blower, especially the muffler, air intake, and air filter.

Maintenance and Repairs

The power unit requires regular maintenance. Perform only the maintenance and repair work described in the operating instructions for the CombiTool and CombiMotor. Have all other work performed by an authorized dealer.

STIHL recommends having maintenance and repair work performed exclusively by an STIHL dealer. STIHL dealers regularly receive training and have access to technical information.

Only install high-quality parts. Failure to do so may result in accidents or damage to the unit. Contact an authorized dealer if you have questions.

STIHL recommends installing original STIHL parts. These are optimally matched to the unit and user requirements in terms of their characteristics.

Always switch off the engine for repair, maintenance, and cleaning work – risk of injury!

Approved Combi-Motors

Only use CombiMotors supplied by STIHL or expressly approved for mounting. This CombiTool is only permitted for use with the following CombiMotors:

STIHL KM 55 R, KM 56 R, KM 85 R, KM 90, KM 90 R, KM 94 R, KM 100, KM 100 R, KM 110, KM 110 R, KM 130, KM 130 R, KMA 130 R

⚠️ WARNING: For units with a loop handle, the loop (obstacle guard) must be fitted.

Brushcutters with Detachable Shaft

This CombiTool can also be fitted to STIHL detachable shaft brushcutters, T models (base power units). Therefore, the use of this CombiTool is also permitted on the following unit:

STIHL FR 130 T.

⚠️ WARNING: For the use of the loop (obstacle guard), observe the unit's operating instructions.

Completing the Unit

Slide the nozzle onto the blower tube until it stops – turn clockwise to lock.

⚠️ WARNING: Only operate the unit with the blower tube fully assembled – risk of injury!

Assembling CombiTool

Image Description: Diagram showing the attachment of the blower tube to the combi-motor shaft. It illustrates sliding the shaft's tenon into the coupling sleeve's groove and securing it with a screw.

• Slide the tenon (1) on the shaft into the groove (2) of the coupling sleeve until it stops.
• When correctly inserted, the protective screen (3) should be flush with the coupling sleeve (gap A max. 5 mm).
• Firmly tighten the locking screw (4).

Dismantling CombiTool

• Dismantle the CombiTool in reverse order.

Starting/Stopping Engine

Starting the Engine

For starting, fundamentally follow the operating instructions for the CombiMotor or the base power unit!

Image Description: Illustrations showing how to hold the power unit securely on the ground with one hand while preparing to start the engine.

⚙️ NOTE: Only start the unit on a clean, dust-free surface to prevent dust from being drawn into the unit.

Place the unit securely on the ground, ensuring no one is in the vicinity of the outlet. Assume a stable stance – options include standing, stooping, or kneeling. Press the unit firmly to the ground with your left hand, without touching the controls on the operating handle – refer to the CombiMotor or base power unit operating instructions.

⚙️ NOTE: Do not place your foot or knee on the shaft!

The further starting procedure is described in the CombiMotor or base power unit operating instructions.

Stopping the Engine

Refer to the CombiMotor or base power unit operating instructions.

Storing the Unit

For work stoppages of 3 months or more:

• Clean and inspect the housing.
• If the CombiTool is stored separately from the CombiMotor: Fit the protective cap onto the shaft to prevent contamination of the coupling.
• Store the unit in a dry and secure location. Protect it from unauthorized use (e.g., by children).

Maintenance and Cleaning Instructions

The following information applies to normal operating conditions. Under more demanding conditions (e.g., heavy dust) and for longer daily working periods, the specified intervals should be shortened accordingly.

Protective Screen

Image Description: Close-up view of the protective screen (grille) on the air intake.

• Before starting work, after finishing work, and as needed, check the protective screen for dirt and clean it.
• If damaged, have it replaced by an authorized dealer¹).

¹ STIHL recommends contacting an STIHL dealer.

Minimizing Wear and Preventing Damage

Following the guidelines in this manual and the CombiMotor manual prevents excessive wear and damage to the unit. Use, maintenance, and storage of the unit must be carried out as carefully as described in these operating instructions.

The user is solely responsible for all damage caused by failure to observe safety, operating, and maintenance instructions. This applies particularly to:

• Modifications to the product not approved by STIHL.
• Use of tools or accessories not approved for the unit, unsuitable, or of inferior quality.
• Improper use of the unit.
• Use of the unit during sports events or competitions.
• Consequential damage from continued use of the unit with defective parts.

Maintenance Work

All work listed in the "Maintenance and Cleaning Instructions" chapter must be performed regularly. If the user cannot perform this maintenance work themselves, it must be entrusted to a dealer. STIHL recommends having maintenance and repair work performed exclusively by an STIHL dealer. STIHL dealers regularly receive training and have access to technical information.

If this work is neglected or performed improperly, damage may occur for which the user is responsible. This includes, but is not limited to:

• Corrosion and other consequential damage due to improper storage.
• Damage to the unit due to the use of inferior quality replacement parts.

Wear Parts

Even with intended use, some parts of the power unit are subject to normal wear and must be replaced in time, depending on the type and duration of use. These include, but are not limited to:

• Nozzle
• Protective screen

Important Components

Image Description: Diagram illustrating the main parts of the STIHL BG-KM blower attachment. Labeled parts include: 1. Shaft/handlebar, 2. Blower housing, 3. Blower tube, 4. Nozzle.

Technical Data

Maximum air throughput (with round nozzle): 875 - 1025 m³/h (depending on the KM and FR unit used)

Air speed (with round nozzle): 60 - 70 m/s (depending on the KM and FR unit used)

Weight: 1.8 kg

Sound and Vibration Levels

For determining sound and vibration levels, the BG-KM power units with CombiTool consider idling and nominal maximum speed in a 1:6 ratio. For detailed information on the "Vibrations 2002/44/EC" directive for employers, see www.stihl.com/vib.

The K value for sound pressure and sound power level according to directive RL 2006/42/EG is 2.0 dB(A); for vibration value, the K value is 2.0 m/s².

REACH

REACH is an EC regulation for the registration, evaluation, authorization, and restriction of chemicals. For more information on compliance with REACH regulation (EC) No. 1907/2006, see www.stihl.com/reach.

Repair Instructions

Users of this device are authorized to perform only maintenance and care tasks described in this operating manual. More extensive repairs must be carried out by dealers. STIHL recommends having maintenance and repair work performed exclusively by an STIHL dealer. STIHL dealers regularly receive training and have access to technical information.

When performing repairs, only install replacement parts approved by STIHL for this device or technically equivalent parts. Only use high-quality replacement parts. Otherwise, accidents may occur and the device may be damaged. STIHL recommends using original STIHL replacement parts. Original STIHL replacement parts can be identified by their STIHL part number, the STIHL logo, and, if applicable, the STIHL replacement part symbol ⚙️ (on small parts, this symbol may be the only marking).

Environmentally Responsible Disposal

When disposing of waste, observe country-specific disposal regulations. STIHL products do not belong in household waste. STIHL products, batteries, accessories, and packaging must be submitted for environmentally friendly recycling.

Image Description: Disposal symbol showing recycling arrows within a circle, with a trash can crossed out, indicating not to dispose of in household waste.

Current information on environmentally friendly disposal of batteries is available from your STIHL dealer.

EU Declaration of Conformity

ANDREAS STIHL AG & Co. KG declares under its sole responsibility that the product type: CombiTool Blower, Brand: STIHL, Type: BG-KM, Serial identification: 4606, conforms to the relevant provisions of directives 2006/42/EC, 2014/30/EU, and 2000/14/EC, and has been developed and manufactured in accordance with the versions of the following standards valid at the date of manufacture: EN ISO 12100 (in combination with the specified KM and FR units), EN ISO 12100, EN 60335-1, EN 50636-2-100 (in combination with the specified KMA units). The calculation of the measured and guaranteed sound power level was carried out according to directive 2000/14/EC, Annex V, applying standard ISO 11094.

The CE mark is present on the product.

Date of issue: 07.03.2018. Signed by Thomas Elsner, Head of Product Management and Services.