STIHL HL 92 / HL 92 K

Dear Customer,

Thank you for choosing a quality engineered STIHL product. It has been built using modern production techniques and comprehensive quality assurance. Every effort has been made to ensure your satisfaction and trouble-free use of the product. Please contact your STIHL dealer or sales company if you have any queries concerning this product.

Your,
Dr. Nikolas Stihl

Guide to Using this Manual

Pictograms

The meanings of the pictograms attached to the machine are explained in this manual. Depending on the model concerned, the following pictograms may be attached to your machine:

• [fuel-tank-and-oil-mixture] Fuel tank; fuel mixture of gasoline and engine oil
• [fuel-pump-icon] Operate manual fuel pump
• [gear-lubricant-filler-icon] Filler hole for gear lubricant

Symbols in text

WARNING: Warning where there is a risk of an accident or personal injury or serious damage to property.

NOTICE: Caution where there is a risk of damaging the machine or its individual components.

Engineering improvements

STIHL's philosophy is to continually improve all of its products. For this reason, STIHL may modify the design, engineering, and appearance of its products periodically. Therefore, some changes, modifications, and improvements may not be covered in this manual.

Safety Precautions and Working Techniques

Because a hedge trimmer is a high-speed, fast-cutting power tool with very sharp cutting blades and a long reach, special safety precautions must be observed during operation. It is important that you read the instruction manual before first use and keep it in a safe place for future reference. Non-observance of the instruction manual may result in serious or even fatal injury.

Observe all applicable local safety regulations, standards, and ordinances. If you have not used this type of power tool before, have your dealer or another experienced user show you how it is operated or attend a special course in its operation. Minors should never be allowed to use a power tool. Keep bystanders, especially children, and animals away from the work area. When the power tool is not in use, shut it off so that it does not endanger others. Secure it against unauthorized use. The user is responsible for avoiding injury to third parties or damage to their property.

Transporting the Power Tool

Always shut off the engine. Always fit the blade guard (scabbard) before carrying your hedge trimmer short distances. On units with a defined transport position, move the cutter bar to the transport position and ensure it is properly engaged. Carry the power tool properly balanced by the drive tube, with the cutting blades behind you. To reduce the risk of serious burn injuries, avoid touching hot parts of the machine, including the gearbox housing. When transporting by vehicle, properly secure your power tool to prevent turnover, fuel spillage, and damage.

Fueling

Gasoline is an extremely flammable fuel. Keep clear of naked flames. Do not spill any fuel – do not smoke. Always shut off the engine before refueling. Do not fuel a hot engine, as fuel may spill and cause a fire. Open the fuel cap carefully to allow any pressure build-up in the tank to release slowly and avoid fuel spillage. Fuel your power tool only in well-ventilated areas. If you spill fuel, wipe the machine immediately; if fuel gets on your clothing, change immediately.

After fueling, tighten down the fuel tank cap as securely as possible. This reduces the risk of unit vibrations causing the fuel cap to loosen or come off and spill quantities of fuel. To reduce the risk of serious or fatal burn injuries, check for fuel leakage. If fuel leakage is found, do not start or run the engine until the leak is fixed.

Before Starting

Check that your power tool is properly assembled and in good condition – refer to appropriate chapters in the instruction manual. Check the fuel system for leaks, paying special attention to visible parts such as the tank cap, hose connections, and the manual fuel pump (on machines so equipped). If there are any leaks or damage, do not start the engine – risk of fire. Have your machine repaired by a servicing dealer before using it again. The stop switch must move freely. Ensure smooth action of the choke knob, throttle trigger lockout, and throttle trigger – the throttle trigger must return automatically to the idle position. The choke knob must spring back from the [choke-position-g] position to the run position [choke-position-I] when the throttle trigger lockout and throttle trigger are squeezed. Check that the spark plug boot is secure – a loose boot may cause arcing that could ignite combustible fumes and cause a fire. Ensure cutting blades are securely mounted and in good condition (clean, move freely, not warped), properly sharpened, and thoroughly sprayed with STIHL resin solvent (lubricant). On units with an adjustable cutter bar, make sure the adjuster is properly engaged in the required position for starting. On units with a defined transport position (cutter bar folded against drive tube), never attempt to start the unit in the transport position. Never attempt to modify the controls or safety devices in any way. Keep the handles dry and clean, free from oil and dirt, for safe control of the power tool. Adjust the shoulder strap and handles to suit your height and reach. See the chapter on "Fitting the Harness". To reduce the risk of accidents, do not operate your power tool if it is damaged or not properly assembled. If you use a shoulder strap, practice removing and putting down the machine as you would in an emergency. To avoid damage, do not throw the machine to the ground when practicing.

Starting the Engine

Start the engine at least 3 meters from the fueling spot, outdoors only.

Holding and Controlling the Power Tool

Place the power tool on firm ground in an open area. Make sure you have good balance and secure footing. Hold the power tool securely. The cutting blades must be clear of the ground and all other obstructions because they may begin to run when the engine starts. Your power tool is designed to be operated by one person only. Do not allow other persons in the work area, even when starting. To reduce the risk of injury, avoid contact with the cutting blades. Do not drop-start the power tool – start the engine as described in the instruction manual. Note that the cutting blades continue to run for a short period after you let go of the throttle trigger (flywheel effect). Check idle speed setting: The cutting blades must not move when the engine is idling with the throttle trigger released. To reduce the risk of fire, keep hot exhaust gases and hot muffler away from easily combustible materials (e.g., wood chips, bark, dry grass, fuel).

Always hold the power tool firmly with both hands on the handles. Make sure you have firm and secure footing and hold the power tool so that the cutting blades are always away from your body. Some versions of the machine can be carried on a harness to relieve the weight on the operator's arms.

Models with loop handle

Right hand on control handle, left hand on loop handle on drive tube, even if you are left-handed. Wrap fingers and thumbs firmly around the handles.

Machines with handle hose

Right hand on control handle, left hand on handle hose on drive tube, even if you are left-handed. Wrap fingers and thumbs firmly around the handles.

During Operation

In the event of impending danger or in an emergency, switch off the engine immediately – move the stop switch [stop-symbol] to the direction of 0.

This power tool is not insulated against electric shock. To reduce the risk of electrocution, keep well clear of electric power lines.

To reduce the risk of injury from moving blades or falling cuttings, do not allow bystanders within 5 meters of your own position.

To reduce the risk of damage to property, also maintain this distance from other objects (vehicles, windows).

Watch the cutting blades at all times – do not cut areas of the hedge that you cannot see. Be extremely careful when cutting tall hedges; check the other side of the hedge before starting work. Make sure the idle speed setting is correct. The cutting blades must not run when the engine is idling with the throttle trigger released. Check and correct the idle speed setting regularly. If the cutting blades still run when the engine is idling, have your dealer check your machine and make proper adjustments or repairs. Note that the cutting blades continue to run for a short period after you let go of the throttle trigger – flywheel effect. Take special care in slippery conditions (ice, wet ground, snow) – on slopes or uneven ground. Clear away fallen branches, scrub, and cuttings.

Working Techniques

Horizontal Cut (with cutter bar at an angle)

Cutting close to the ground from a standing position, e.g., low shrubs. Swing the cutter bar up and down as you move along the hedge – use both sides of the cutting blades, do not rest the cutter bar on the ground. WARNING: The K version (HL 92 K) is not approved for cutting close to the ground.

Vertical Cut (with cutter bar at an angle)

Cutting without standing directly next to the hedge, e.g., flowerbed between operator and hedge. Swing the cutter bar up and down in an arc as you move along the hedge – use both sides of the cutting blades.

Vertical Cut (with straight cutter bar)

Extra long reach without the need for other aids. Swing the cutter bar up and down in an arc as you move along the hedge – use both sides of the cutting blades.

Overhead Cut (with cutter bar at an angle)

Hold the hedge trimmer vertically and swing it in an arc to make maximum use of its reach. WARNING: Any working position above head height is tiring. To minimize the risk of accidents, work in such positions for short periods only. Set the adjustable cutter bar to the most suitable angle so that the unit can be held in a lower, less tiring position while still providing adequate reach.

Horizontal Cut (with straight cutter bar)

Hold the cutter bar at an angle of 0° to 10° as you swing the hedge trimmer horizontally.

Approved Power Tool Attachments

The following STIHL attachments may be mounted to the basic power tool:

¹⁾ Loop handle required on versions with long drive tube (HL 92, HL 94)
²⁾ Not approved for versions with short drive tube (HL 92 K)
³⁾ Loop handle required

Assembling the Unit

Mounting the Loop Handle (HL 92, HL 94)

Loop handle is required on versions with long drive tube (HL 92, HL 94).

Diagram shows: 1. Clamp, 2. Loop handle, 3. Carrying ring, 4. Handle hose, 5. Drive tube, 6. Clamp, 7. Screws, 8. Washers, 9. Square nuts.

• Place the clamp (1) in the loop handle (2) and position them both against the drive tube (5) between the carrying ring (3) and handle hose (4).
• Position the clamp (6) against the shaft.
• Line up the holes.
• Insert the screws (7) with washers (8).
• Fit the square nuts (9) and screws.

Mounting the Gearbox

Diagram shows: 2. Loop handle, 5. Drive tube, 10. Clamp screws, 11. Gearbox, 12. Slot in clamp.

• Align the loop handle (2) and move it to the most comfortable position (recommended: about 20 cm).
• Tighten down the screws firmly.
• Loosen the clamp screws (10).
• Push the gearbox (11) onto the drive tube (5), turn the gearbox (11) back and forth as necessary.
• Once the end of the drive tube is inserted beyond the slot in the clamp (12): Push the gearbox (11) fully home as far as stop.
• Tighten down the clamp screws moderately.
• Line up the gearbox (11) with the powerhead.
• Tighten down the clamp screws firmly.

Fuel

Your engine requires a mixture of gasoline and engine oil.

WARNING: For health reasons, avoid direct skin contact with gasoline and avoid inhaling gasoline vapor.

STIHL MotoMix

STIHL recommends the use of STIHL MotoMix. This ready-to-use fuel mix contains no benzol or lead, has a high octane rating, and ensures that you always use the right mix ratio. STIHL MotoMix uses STIHL HP Ultra two-stroke engine oil for an extra long engine life. MotoMix is not available in all markets.

Mixing Fuel

NOTICE: Unsuitable fuels or lubricants or mix ratios other than those specified may result in serious damage to the engine. Poor quality gasoline or engine oil may damage the engine, sealing rings, hoses, and the fuel tank.

Gasoline

Use only high-quality brand-name gasoline with a minimum octane rating of 90 – leaded or unleaded.

Gasoline with an ethanol content of more than 10% can cause running problems in engines with a manually adjustable carburetor and should not be used in such engines. Engines equipped with M-Tronic deliver full power when run on gasoline with an ethanol content of up to 25% (E25).

Engine Oil

If you mix the fuel yourself, use only STIHL two-stroke engine oil or another high-performance engine oil in accordance with JASO FB, JASO FC, JASO FD, ISO-L-EGB, ISO-L-EGC, or ISO-L-EGD. STIHL specifies STIHL HP Ultra two-stroke engine oil or an equivalent high-performance engine oil to maintain emission limits over the machine's service life.

Mix Ratio

STIHL 50:1 two-stroke engine oil: 50 parts gasoline to 1 part oil

Examples

Use a canister approved for storing fuel. Pour oil into canister first, then add gasoline and mix thoroughly.

Storing Fuel

Store fuel only in approved safety-type fuel canisters in a dry, cool, and safe location protected from light and the sun. Fuel mix ages – only mix sufficient fuel for a few weeks' work. Do not store fuel mix for longer than 30 days. Exposure to light, the sun, low or high temperatures can quickly make the fuel mix unusable. STIHL MotoMix may be stored for up to 2 years without any problems.

• Thoroughly shake the mixture in the canister before fueling your machine.

WARNING: Pressure may build up in the canister – open it carefully.

• Clean the fuel tank and canister from time to time.
• Dispose of remaining fuel and cleaning fluid properly in accordance with local regulations and environmental requirements.

Fueling

Fuel filler cap

Diagram shows fuel filler cap on the machine.

WARNING: When fueling on a slope, always position the machine with the filler cap facing uphill.

• Place the machine on level ground so that the filler cap is facing up.
• Before fueling, clean the filler cap and the area around it to ensure that no dirt falls into the tank.

Diagram shows turning the fuel cap counterclockwise.

• Turn the cap counterclockwise until it can be removed from the tank opening.
• Remove the cap.

Filling up with fuel

Take care not to spill fuel while fueling and do not overfill the tank. STIHL recommends you use the STIHL filler nozzle for fuel (special accessory).

• Fill up with fuel.

Diagram shows closing the fuel tank cap by turning clockwise.

• Place the cap in the opening.
• Turn the cap clockwise as far as stop and tighten it down as firmly as possible by hand.

Adjusting the Cutter Bar

Angle Adjuster - 145°

Diagram shows cutter bar angles from 0° to 145° in stages.

The angle of the cutter bar can be adjusted upwards in 4 stages from 0° (straight) to 55°, and downwards in 7 stages from 0° to 90° (right angle facing down). There are therefore 12 possible working positions.

WARNING: To reduce the risk of injury, carry out the adjustment only when the cutting blades are at a standstill – engine at idle speed.

WARNING: The gearbox gets hot during operation. To reduce the risk of burn injury, do not touch the gearbox.

Fitting the Harness

Some versions of the machine can be carried on a shoulder strap. The type and style of the shoulder strap depend on the market.

Shoulder Strap

Diagram shows a person wearing a shoulder strap harness.

• Put on the shoulder strap (1).
• Adjust the length of the strap.
• With the power tool attached, the carabiner (3) must be at about the same height as your right hip.

Attaching Machine to Shoulder Strap

Diagram shows a carabiner attaching to a carrying ring.

• Attach the carabiner (1) to the carrying ring (2) on the drive tube – hold the carrying ring steady.

Disconnecting Machine from Shoulder Strap

Diagram shows releasing a carabiner from a carrying ring.

• Press down the bar on the carabiner (1) and pull the carrying ring (2) out of the carabiner.

Throwing Off the Machine

WARNING: The machine must be quickly thrown off in the event of imminent danger. Practice removing and putting down the machine as you would in an emergency. To avoid damage, do not throw the machine to the ground when practicing. Practice quickly detaching the power tool from the carabiner as described under "Disconnecting Machine from Shoulder Strap". If you are using a shoulder strap: Practice slipping the strap off your shoulder.

Starting / Stopping the Engine

Controls

Diagram shows controls: 1. Throttle trigger lockout, 2. Throttle trigger, 3. Stop switch (Run and Stop positions), 4. Throttle set wheel.

Function of Stop Switch and Ignition System

The ignition is switched off and the engine stopped when the stop switch is pressed. The stop switch returns automatically to the Run position when it is released: the ignition is switched on again after the engine stops – the engine is then ready to start.

Function of Throttle Set Wheel

The throttle set wheel (4) enables the travel of the throttle trigger to be preset anywhere between idle and full throttle.

• Turn throttle set wheel (4) in direction of – to reduce throttle trigger travel and maximum engine speed.
• Turn throttle set wheel (4) in direction of + to increase throttle trigger travel and maximum engine speed.
• It is possible to override the preset stop and open the throttle wide by pulling the throttle trigger firmly – the preset stop remains unaffected. The original setting is restored when the throttle trigger is released.

Starting the Engine

Diagram shows manual fuel pump bulb (5) and choke knob (6).

• Press the manual fuel pump bulb (5) at least five times – even if the bulb is already filled with fuel.

Cold engine (cold start)

• Turn choke knob (6) and then push it in at [choke-position-g].
• Also use this setting if the engine has been running but is still cold.
• Turn throttle set wheel in direction of + as far as stop.

Hot engine (hot start)

• Choke knob (6) remains in [choke-position-I] position.

Cranking

Diagram shows correct stance and grip for cranking.

• Place the machine on the ground: It must rest securely on the engine support and the gearbox housing.
• On units with an adjustable cutter bar and defined transport position: Set the cutter bar to the straight (0°) position.
• If fitted: Remove blade scabbard from the cutting blades.

To reduce the risk of accidents, check that the cutting blades are not touching the ground or any other obstacles.

• Make sure you have a firm footing, either standing, stooping, or kneeling.
• Hold the machine firmly on the ground with your left hand and press down – do not touch the throttle trigger, lockout lever, or stop switch.

NOTICE: Do not stand or kneel on the shaft.

• Hold the starter grip with your right hand.

Version without ErgoStart

• Pull the starter grip slowly until you feel it engage and then give it a brisk, strong pull.

Version with ErgoStart (C-E)

• Pull the starter rope slowly and steadily.

NOTICE: Do not pull out the starter rope all the way – it might otherwise break.

• Do not let the starter grip snap back. Guide it slowly back into the housing so that the starter rope can rewind properly.
• Continue cranking until the engine runs.

As soon as the engine runs

• At temperatures below +10°C: Warm up the engine for at least 10 seconds in position [choke-position-I].
• At temperatures above +10°C: Warm up the engine for at least 5 seconds in position [choke-position-I].
• Depress throttle trigger lockout and pull the throttle trigger – the choke knob moves to the run position [choke-position-I].
• Warm up a cold engine at varying speeds.

WARNING: Make sure the carburetor is correctly adjusted. The cutting blades must not move when the engine is idling. Your machine is now ready for operation.

Stopping the Engine

• Depress the momentary contact stop switch – the engine stops – release the stop switch – it springs back to the run position.

Other Hints on Starting

Engine stalls in cold start position [choke-position-g].

• Depress throttle trigger lockout and pull the throttle trigger – the choke knob moves to the run position [choke-position-I].
• Continue cranking in position [choke-position-I] until the engine runs.

Operating Instructions

During break-in period

A factory-new machine should not be run at high revs (full throttle off load) for the first three tank fillings. This avoids unnecessary high loads during the break-in period. As all moving parts have to bed in during the break-in period, the frictional resistances in the engine are greater during this period. The engine develops its maximum power after about 5 to 15 tank fillings.

During Operation

After a long period of full throttle operation, allow the engine to run for a short while at idle speed so that engine heat can be dissipated by the flow of cooling air. This protects engine-mounted components (ignition, carburetor) from thermal overload.

After Finishing Work

Storing for a short period: Wait for the engine to cool down. Empty the fuel tank and keep the machine in a dry place, well away from sources of ignition, until you need it again. For longer out-of-service periods, see "Storing the Machine".

Cleaning the Air Filter

If there is a noticeable loss of engine power:

• Set knob for warm start (1) to [choke-position-g].
• Turn screw (2) in filter cover (3) counterclockwise until the cover is loose.
• Remove filter cover (3).
• Clean away loose dirt from around the filter.

Diagram shows removing the felt filter (5) from the housing (4).

• Grip into the recess (4) in the filter housing and remove the felt filter (5).
• Replace felt filter (5) – as a temporary measure, you can knock it out on the palm of your hand or blow it out with compressed air – do not wash.

NOTICE: Replace any damaged parts!

• Insert felt filter (5) form-fittingly into the filter housing.
• Set knob for warm start (1) to [choke-position-g].
• Fit filter cover (3) – make sure not to tilt the screw (2) – insert screw and tighten.

Adjusting the Carburetor

The carburetor of the machine has been adjusted at the factory for optimum performance and fuel efficiency in all operating states.

Setting the idle speed

• Engine stops when idling: Turn the idle speed screw (LA) slowly clockwise until the engine runs smoothly.
• Cutting blades move when idling: Turn the idle speed adjusting screw (LA) slowly counterclockwise until the cutting blades stop moving.

WARNING: If the cutting blades continue to move in idle even after adjustment, have the machine repaired by a STIHL servicing dealer.

Spark Plug

• If the engine is down on power, difficult to start, or runs poorly at idle speed, first check the spark plug.
• Fit a new spark plug after about 100 operating hours or sooner if the electrodes are badly eroded. Install only suppressed spark plugs of the type approved by STIHL – see "Specifications".

Removing the spark plug

Diagram shows removing spark plug cap and boot.

• Turn screw (1) in cap (2) until cap can be removed.
• Lay down cap.
• Pull off the spark plug boot (3).
• Unscrew spark plug.

Checking the Spark Plug

Diagram shows spark plug with electrode gap 'A'.

• Clean dirty spark plug.
• Check electrode gap (A) and readjust if necessary – see "Specifications".
• Rectify the problems which have caused fouling of the spark plug. Possible causes are: Too much oil in fuel mix, Dirty air filter, Unfavorable running conditions.

Diagram shows a spark plug with a warning symbol about arcing.

• Use resistor type spark plugs with a properly tightened adapter nut.

Installing the Spark Plug

• Fit the spark plug and tighten it down firmly.
• Press the boot firmly onto the spark plug.

Lubricating the Gearbox

Blade Drive Gear

Lubricate the blade drive gear with STIHL gear lubricant for hedge trimmers – see "Special Accessories".

HL 0° version

Diagram shows lubrication points for HL 0° version.

• Fit the cap (1), insert the screw (2) and tighten it down firmly.

Adjustable HL 145° version

Diagram shows lubrication points for Adjustable HL 145° version.

• Check the lubricant level at regular intervals of about every 25 hours of operation. Unscrew the filler plug (1) – if no grease can be seen on the inside of the filler plug, screw the tube of grease into the filler hole.
• Squeeze up to 10 g (2/5 oz) grease into the gearbox.

NOTICE: Do not completely fill the gearbox with grease.

• Unscrew the tube of grease from the filler hole.
• Refit the filler plug and tighten it down firmly.

Angle Drive Gear

Lubricate the angle drive gear with STIHL gear lubricant for hedge trimmers (special accessory).

Adjustable HL 145° version

Diagram shows lubrication points for Adjustable HL 145° version.

• Check the lubricant level at regular intervals of about every 25 hours of operation. Unscrew the filler plug (2) – if no grease can be seen on the inside of the filler plug, screw the tube of grease into the filler hole.
• Squeeze up to 5 g (1/5 oz) grease into the gearbox.

NOTICE: Do not completely fill the gearbox with grease.

• Unscrew the tube of grease from the filler hole.
• Refit the filler plug and tighten it down firmly.

Sharpening Instructions

When cutting performance and behavior begin to deteriorate, i.e., blades frequently snag on branches: Resharpen the cutting blades.

It is best to have the cutting blades resharpened by a dealer on a workshop sharpener. STIHL recommends an authorized STIHL servicing dealer. It is also possible to use a flat crosscut sharpening file. Hold the sharpening file at the prescribed angle (see "Specifications").

• Only sharpen the cutting edge.
• Always file towards the cutting edge.
• The file only sharpens on the forward stroke – lift it off the blade on the backstroke.
• Use a whetstone to remove burr from cutting edges.
• Remove as little material as possible.
• After sharpening, clean away filing or grinding dust and then spray the cutting blades with STIHL resin solvent.

NOTICE: Do not operate your machine with dull or damaged cutting blades. This may cause overload and will give unsatisfactory cutting results.

Storing the Machine

For periods of about 3 months or longer:

• Drain and clean the fuel tank in a well-ventilated area.
• Dispose of fuel properly in accordance with local environmental requirements.
• Run the engine until the carburetor is dry – this helps prevent the carburetor diaphragms sticking together.
• Clean the cutting blades, check condition, and spray them with STIHL resin solvent.
• Fit the blade scabbard.
• Thoroughly clean the machine.
• Store the machine in a dry and secure location. Keep out of the reach of children and other unauthorized persons.

Inspection and Maintenance by User

Throttle Cable

Checking adjustment of throttle cable

Error: Engine speed increases when only the throttle trigger is pulled.

Diagram shows throttle trigger (1) and lockout (2).

• Start the engine.
• Pull the throttle trigger (1) – do not press down the throttle trigger lockout (2).

If the engine speed increases or if the cutting blades run, the throttle cable has to be adjusted.

• Shut off the engine.
• Have throttle cable adjusted by your dealer. STIHL recommends an authorized STIHL servicing dealer.

Inspections and Maintenance by Dealer

Maintenance Work

STIHL recommends that you have servicing and repair work carried out exclusively by an authorized STIHL servicing dealer.

Antivibration Element

A vibration-absorbing rubber element is installed between the powerhead and the shaft. Have it checked if there are signs of wear or a noticeable increase in vibration levels.

Maintenance and Care

The following intervals apply to normal operating conditions only. If your daily working time is longer or operating conditions are difficult (very dusty work area, etc.), shorten the specified intervals accordingly.

¹⁾ Only if there is a noticeable loss of engine power
²⁾ STIHL recommends an authorized STIHL servicing dealer.

Minimize Wear and Avoid Damage

Observing the instructions in this manual helps reduce the risk of unnecessary wear and damage to the power tool. The power tool must be operated, maintained, and stored with the due care and attention described in this owner's manual. The user is responsible for all damage caused by non-observance of the safety precautions, operating, and maintenance instructions in this manual. This includes in particular:

• Alterations or modifications to the product not approved by STIHL.
• Using tools or accessories which are neither approved or suitable for the product or are of a poor quality.
• Using the product for purposes for which it was not designed.
• Using the product for sports or competitive events.
• Consequential damage caused by continuing to use the product with defective components.

Maintenance Work

All the operations described in the "Maintenance Chart" must be performed on a regular basis. If these maintenance operations cannot be performed by the owner, they should be performed by a servicing dealer. STIHL recommends that you have servicing and repair work carried out exclusively by an authorized STIHL servicing dealer. STIHL dealers are regularly given the opportunity to attend training courses and are supplied with the necessary technical information. If these maintenance operations are not carried out as specified, the user assumes responsibility for any damage that may occur. Among other parts, this includes:

• Damage to the engine due to neglect or deficient maintenance (e.g., air and fuel filters), incorrect carburetor adjustment, or inadequate cleaning of cooling air inlets (intake ports, cylinder fins).
• Corrosion and other consequential damage resulting from improper storage.
• Damage to the machine resulting from the use of poor quality replacement parts.

Parts Subject to Wear and Tear

Some parts of the power tool are subject to normal wear and tear even during regular operation in accordance with instructions and, depending on the type and duration of use, have to be replaced in good time. Among other parts, this includes:

• Cutting blades
• Clutch
• Filters (air, fuel)
• Rewind starter
• Spark plug
• Components of antivibration system

Main Parts

Diagram illustrates the main parts of the STIHL HL 92, HL 94, and HL 92 K models with numbered components.

HL 92, HL 94

1. Handle hose
2. Loop handle
3. Carrying ring
4. Stop switch
5. Throttle trigger lockout
6. Set wheel
7. Throttle trigger
8. Spark plug boot with cap
9. Air filter cover
10. Machine support
11. Manual fuel pump
12. Choke knob
13. Carburetor adjusting screw
14. Tank cap
15. Fuel tank
16. Starter grip
17. Muffler

HL 92 K

18. Cutting blade
19. Blade drive gear
20. Drive tube
21. Angle drive
22. Sliding sleeve
23. Quadrant
24. Adjusting lever
25. Blade scabbard
26. Serial number

Specifications

Engine

Single cylinder two-stroke engine

• Displacement: 24.1 cc
• Bore: 35 mm
• Stroke: 25 mm
• Engine power to ISO 8893: 0.9 kW (1.2 bhp) at 8,500 rpm
• Idle speed: 2,800 rpm
• Cut-off speed (rated): 9,300 rpm

Ignition System

• Electronic magneto ignition
• Spark plug (resistor type): NGK CMR6H
• Electrode gap: 0.5 mm

Fuel System

• Fuel tank capacity: 540 cc (0.54 l)

Weight

• Dry weight with 0° gearbox, 500 mm: HL 92: 5.7 kg, HL 92 K: 5.2 kg
• Dry weight with 0° gearbox, 600 mm: HL 92: 5.8 kg, HL 92 K: 5.3 kg
• Dry weight with 145° adjustable gearbox, 500 mm: HL 92: 6.1 kg, HL 92 K: 5.5 kg
• Dry weight with 145° adjustable gearbox, 600 mm: HL 92: 6.2 kg, HL 92 K: 5.7 kg

Cutting Blades

• Type: Double-edged for bidirectional cutting
• Cutting length: 500 mm / 600 mm
• Tooth spacing: 34 mm
• Tooth height: 22 mm
• Sharpening angle: 45° to horizontal

Noise and Vibration Data

Noise and vibration data are measured at idling and maximum rated speed in a ratio of 1:4. For further details on compliance with Vibration Directive 2002/44/EEC see www.stihl.com/vib/

• Sound pressure level L_p to ISO 22868: HL 92: 91 dB(A), HL 92 K: 92 dB(A)
• Sound power level L_w to ISO 22868: HL 92: 107 dB(A), HL 92 K: 108 dB(A)

HL 0°, 500 mm:

• Vibration measurement a_hv,eq to ISO 22867: HL 92, left hand on loop handle: Loop handle: 6.9 m/s², Control handle: 6.1 m/s²
• Vibration measurement a_hv,eq to ISO 22867: HL 92, left hand on handle hose: Handle hose: 4.8 m/s², Control handle: 6.3 m/s²
• Vibration measurement a_hv,eq to ISO 22867: HL 92 K: Handle hose: 6.2 m/s², Control handle: 5.9 m/s²

HL 0°, 600 mm:

• Vibration measurement a_hv,eq to ISO 22867: HL 92, left hand on loop handle: Loop handle: 7.9 m/s², Control handle: 6.2 m/s²
• Vibration measurement a_hv,eq to ISO 22867: HL 92, left hand on handle hose: Handle hose: 5.6 m/s², Control handle: 6.1 m/s²
• Vibration measurement a_hv,eq to ISO 22867: HL 92 K: Handle hose: 6.0 m/s², Control handle: 6.5 m/s²

HL 145°, 500 mm:

• Vibration measurement a_hv,eq to ISO 22867: HL 92, left hand on loop handle: Loop handle: 6.1 m/s², Control handle: 5.4 m/s²
• Vibration measurement a_hv,eq to ISO 22867: HL 92, left hand on handle hose: Handle hose: 4.9 m/s², Control handle: 4.9 m/s²
• Vibration measurement a_hv,eq to ISO 22867: HL 92 K: Handle hose: 7.0 m/s², Control handle: 7.2 m/s²

HL 145°, 600 mm:

• Vibration measurement a_hv,eq to ISO 22867: HL 92, left hand on loop handle: Loop handle: 6.5 m/s², Control handle: 5.4 m/s²
• Vibration measurement a_hv,eq to ISO 22867: HL 92, left hand on handle hose: Handle hose: 4.9 m/s², Control handle: 4.9 m/s²
• Vibration measurement a_hv,eq to ISO 22867: HL 92 K: Handle hose: 6.4 m/s², Control handle: 6.4 m/s²

The K-factor in accordance with Directive 2006/42/EC is 2.0 dB(A) for the sound pressure level and sound power level; the K-factor in accordance with Directive 2006/42/EC is 2.0 m/s² for the vibration level.

REACH

REACH is an EC regulation and stands for the Registration, Evaluation, Authorisation and Restriction of Chemical substances. For information on compliance with the REACH regulation (EC) No. 1907/2006 see www.stihl.com/reach.

Exhaust Emissions

The CO₂ value measured in the EU type approval procedure is specified at www.stihl.com/co2. The measured CO₂ value was determined on a representative engine in accordance with a standardized test procedure under laboratory conditions and does not represent either an explicit or implied guarantee of the performance of a specific engine. The applicable exhaust emission requirements are fulfilled by the intended usage and maintenance described in this instruction manual. The type approval expires if the engine is modified in any way.

Maintenance and Repairs

Users of this machine may only carry out the maintenance and service work described in this user manual. All other repairs must be carried out by a servicing dealer. STIHL recommends that you have servicing and repair work carried out exclusively by an authorized STIHL servicing dealer. STIHL dealers are regularly given the opportunity to attend training courses and are supplied with the necessary technical information. When repairing the machine, only use replacement parts which have been approved by STIHL for this power tool or are technically identical. Only use high-quality replacement parts to avoid the risk of accidents and damage to the machine. STIHL recommends the use of original STIHL replacement parts. Original STIHL parts can be identified by the STIHL part number, the STIHL logo, and the STIHL parts symbol [STIHL-logo-symbol] (the symbol may appear alone on small parts).

Disposal

Observe all country-specific waste disposal rules and regulations.

STIHL products must not be thrown in the garbage can. Take the product, accessories, and packaging to an approved disposal site for environment-friendly recycling. Contact your STIHL servicing dealer for the latest information on waste disposal.

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EC Declaration of Conformity

ANDREAS STIHL AG & Co. KG, Badstr. 115, D-71336 Waiblingen, Germany, declare in exclusive responsibility that:

• Designation: Long reach hedge trimmer
• Make: STIHL
• Model: HL 92, HL 92 K
• Serial identification: 4243
• Displacement All HL 92 models: 24.1 cc

conforms to the relevant provisions of Directives 2011/65/EU, 2006/42/EC, 2014/30/EU and 2000/14/EC and has been developed and manufactured in compliance with the following standards in the versions valid on the date of production:

EN ISO 10517, EN 55012, EN 61000-6-1

The measured and guaranteed sound power levels were determined according to Directive 2000/14/EC, Annex V, using the ISO 11094 standard.

• Measured sound power level: All HL 92 models: 101 dB(A), All HL 92 K models: 101 dB(A)
• Guaranteed sound power level: All HL 92 models: 103 dB(A), All HL 92 K models: 103 dB(A)
• Technical documents deposited at: ANDREAS STIHL AG & Co. KG Produktzulassung (Product Licensing)

The year of manufacture and serial number are applied to the product. Done at Waiblingen, 28.11.2018

ANDREAS STIHL AG & Co. KG
Thomas Elsner
Director Product Management and Services

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