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STIH)
STIHL HS 85
Instruction Manual Manual de instrucciones
Warning!
For safe operation follow all safety precautions in Instruction Manual - improper use can cause serious injury.
Advertencia!
Para su seguridad durante el manejo de este producto, siga siempre las precauciones de seguridad dadas en el manual de instrucciones - el uso indebido puede causar lesiones graves.
Contents
03.fm |
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Guide to Using this Manual .............. |
2 |
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Safety Precautions ........................... |
3 |
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004 01 |
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Using the Unit ................................. |
10 |
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Fuel ................................................ |
11 |
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017_ |
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Fueling ............................................ |
12 |
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Starting / Stopping |
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SE_ |
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the Engine |
13 |
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Cleaning the Air Filter |
15 |
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Motor Management ........................ |
15 |
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Adjusting the Carburetor ................ |
16 |
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Spark Arresting Screen |
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recycled. |
in Muffler ......................................... |
17 |
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Checking the Spark Plug |
17 |
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Lubricating Gearbox ....................... |
18 |
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can be |
Replacing the Starter Rope |
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and Rewind Spring ......................... |
19 |
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paper |
Operating Instructions .................... |
21 |
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Storing the Machine |
22 |
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oils; |
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Sharpening Instructions .................. |
22 |
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paper.free-chlorineon vegetablecontaininks |
Maintenance Chart |
23 |
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Parts and Controls .......................... |
24 |
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Specifications ................................. |
26 |
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Special Accessories ....................... |
27 |
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Maintenance and Repairs ............... |
27 |
Printed |
Printing |
STIHL Incorporated Federal |
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and California Emission Control |
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Warranty Statement ........................ |
28 |
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SA |
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G,2 005 |
rintedU n |
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&o CK. |
MP. i |
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IHL AG |
H51. P. |
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STS |
21. |
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© ANDRE |
04580 67M3 |
STIHl |
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A |
3 |
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English / USA
Allow only persons who understand this manual to operate your hedge trimmer.
To receive maximum performance and satisfaction from your STIHL hedge trimmer, it is important that you read and understand the maintenance and safety precautions, starting on page 3, before using your hedge trimmer.
Contact your STIHL dealer or the STIHL distributor for your area if you do not understand any of the instructions in this manual.
!Warning!
Because a hedge trimmer is a highspeed cutting tool some special safety precautions must be observed to reduce the risk of personal injury.
Careless or improper use may cause serious or even fatal injury.
STIHL's philosophy is to continually improve all of its products. As a result, engineering changes and improvements are made from time to time. If the operating characteristics or the appearance of your hedge trimmer differs from those described in this manual, please contact your STIHL dealer for information and assistance.
HS 85 |
1 |
English / USA
Guide to Using this Manual
Pictograms
All the pictograms attached to the machine are shown and explained in this manual.
The operating and handling instructions are supported by illustrations.
Symbols in text
The individual steps or procedures described in the manual may be marked in different ways:
:Step or procedure without direct reference to an illustration.
Description of step or procedure that refers directly to the illustration and contains item numbers that appear in the illustration.
Example:
Loosen the screw (1) Lever (2) ...
In addition to the operating instructions, this manual may contain paragraphs that require your special attention. Such paragraphs are marked with the symbols described below:
Warning where there is a risk of an accident or personal injury or
serious damage to property.
Warning where there is a risk of damaging the machine or individual components.
Note or hint which is not essential for using the machine, but may improve the operator’s understanding of the situation and result in better use of the machine.
Note or hint on correct procedure in 
order to avoid damage to the environment.
Equipment and features
This instruction manual refers to several models with different features. Components that are not installed in all models and related applications are marked thus *. Such components are available as special accessories from your STIHL dealer.
Engineering improvements
STIHL’s philosophy is to continually improve all of its products. As a result, engineering changes and improvements are made from time to time. If the operating characteristics or the appearance of your machine differ from those described in this manual, please contact your STIHL dealer for assistance.
Therefore, we cannot be responsible for changes, modifications or improvements not covered in this manual.
2 |
HS 85 |
Safety Precautions
Because a hedge trimmer is a high-speed, fast-cutting power tool,
special safety precautions must be observed to reduce the
risk of personal injury.
It is important that you read, fully understand and observe the following safety precautions and warnings. Read the owner's manual and the
safety instructions periodically.
Careless or improper use of any hedge trimmer may cause serious or fatal injury.
Have your STIHL dealer show you how to operate your hedge trimmer. Observe all applicable local safety regulations, standards and ordinances.
!Warning!
The use of any hedge trimmer may be hazardous. If the cutting tool comes in contact with your body, it will cut you.
Striking solid foreign objects such as stones, fence wire or metal could damage the cutting attachment and may cause blades to crack, chip or break.
English / USA
STIHL does not recommend the use of hedge trimmers when cutting in areas where the blades could contact such objects.
!Warning!
Minors should never be allowed to use a hedge trimmer. Bystanders, especially children, and animals should not be allowed in the area where a hedge trimmer is in use.
The operator is responsible for avoiding injury of third parties and damage to their property.
Never let the hedge trimmer run unattended.
!Warning!
Do not lend or rent your hedge trimmer without the owner's manual. Be sure that anyone using your hedge trimmer understands the information contained in this manual.
Most of these safety precautions and warnings apply to the use of all STIHL hedge trimmers. Different models may have different parts and controls. See the appropriate section of your owner's manual for a description of the controls and function of the parts of your model hedge trimmer.
Safe use of a hedge trimmer involves
1.the operator
2.the hedge trimmer
3.the use of the hedge trimmer.
THE OPERATOR!
Physical Condition
You must be in good physical condition and mental health and not under the influence of any substance (drugs, alcohol, etc.) which might impair vision, dexterity or judgment. Do not operate a hedge trimmer when you are fatigued. Be alert - if you get tired while operating your hedge trimmer, take a break. Tiredness may result in loss of control. Working with any hedge trimmer can be strenuous. If you have any condition that might be aggravated by strenuous work, check with your doctor before operating a hedge trimmer.
HS 85 |
3 |
English / USA
!Warning!
Prolonged use of a hedge trimmer (or other machines) exposing the operator to vibrations may produce whitefinger disease (Raynaud's phenomenon) or carpal tunnel syndrome. These conditions reduce the hand's ability to feel and regulate temperature, produce numbness and burning sensations and may cause nerve and circulation damage and tissue necrosis.
All factors which contribute to whitefinger disease are not known, but cold weather, smoking and diseases or physical conditions that affect blood vessels and blood transport, as well as high vibration levels and long periods of exposure to vibration are mentioned as factors in the development of whitefinger disease. In order to reduce the risk of whitefinger disease and carpal tunnel syndrome, please note the following:
:Most STIHL power tools are available with an anti-vibration ("AV") system designed to reduce the transmission of vibrations created by the engine to the operator's hands. An AV system is recommended for those persons using power tools on a regular or sustained basis.
:Wear gloves and keep your hands warm.
:Keep the AV system well maintained. A hedge trimmer with loose components or with damaged or worn AV buffers will tend to have higher vibration levels.
:Maintain a firm grip at all times, but do not squeeze the handles with constant, excessive pressures, take frequent breaks.
All the above mentioned precautions do not guarantee that you will not sustain whitefinger disease or carpal tunnel syndrome. Therefore continual and regular users should monitor closely the condition of their hands and fingers. If any of the above symptoms appear, seek medical advice immediately.
!Warning!
The ignition system of your unit produces an electromagnetic field of a very low intensity. This field may interfere with some pacemakers. To reduce the risk of serious or fatal injury, persons with pacemaker should consult their physician and the pacemaker manufacturer before operating this tool.
Proper Clothing
!Warning!
Hedge trimmer operation can cause serious injury to eyes, ears and person. Therefore, to reduce the risk of injury to your eyes
never operate a hedge trimmer unless wearing goggles or properly fitted safety glasses with adequate top and side protection complying with ANSI Z 87.1 (or your applicable national standard). To reduce the risk of injury to your face STIHL recommends that you also wear a face shield or face screen over your goggles or safety glasses.
!Warning!
Hedge trimmer noise may damage your hearing. Wear sound barriers (ear plugs or ear mufflers) to protect your hearing. Continual and regular users should have their hearing checked regularly.
4 |
HS 85 |
English / USA
Wear proper protective clothing. Clothing must be
sturdy and snug-fitting, but allow complete
freedom of movement. Avoid loose-fitting jackets,
scarfs, neckties, jewelry, flared or cuffed pants, unconfined long hair or anything that could become caught on branches, brush or moving parts of the unit. Wear long pants made of heavy material to protect your legs.
Do not wear shorts.
Protect your hands with gloves when handling the hedge trimmer and the cutting tool. Heavy-duty, nonslip gloves improve your grip and help to
protect your hands.
Good footing is most important in hedge trimmer work. Wear
sturdy boots with nonslip soles. Steeltoed safety boots are recommended.
Wear an approved safety hard hat to reduce the risk of injury to your head when there is a danger of head injuries.
THE HEDGE TRIMMER
For illustrations and definitions of the hedge trimmer parts see the chapter on "Parts and Controls"!
!Warning!
Never modify a hedge trimmer in any way. Only attachments supplied by STIHL or expressly approved by STIHL for use with the specific STIHL hedge trimmer models are authorized. Although certain unauthorized attachments are useable for the STIHL hedge trimmer, their use may, in fact, be extremely dangerous.
THE USE OF THE HEDGE TRIMMER
Transporting the hedge trimmer
To reduce the risk of injury from blade contact, never carry or transport the hedge trimmer with the cutter blades running. The correct engine idle speed is important in this respect. If the carburetor setting is correct, the cutter blades will be stationary at idle speed.
Always engage the starting lock before transporting the machine (see chapter "Starting"). The starting lock may only be engaged when the cutter blades are at a standstill.
367BA001 LÄ
The hedge trimmer may be carried only in the normal upright position. Grip the front handle and keep the cutter blades behind you.
Always switch off the engine and fit the scabbard over the cutter blades before transporting the hedge trimmer over long distances.
When transporting your hedge trimmer in a vehicle, properly secure it to prevent turnover, fuel spillage and damage to the hedge trimmer.
HS 85 |
5 |
English / USA
Preparation for the use of the hedge trimmer
!Warning!
Always check your hedge trimmer for proper condition and operation before starting, particularly the throttle trigger, throttle trigger interlock, stop switch, cutting tool and starting lock. The throttle trigger must move freely and always spring back to the idle position.The cutting tool must be properly tightened and in safe operating condition. Inspect for loose parts (nuts, screws, etc.) and for cracked, bent, warped or damaged blades. Regularly check the condition and tightness of the cutter blades - with the engine stopped! Service damaged cutter blades before using the hedge trimmer. Always keep blades sharp. Keep the handles clean and dry at all times; it is particularly important to keep them free of oil and resin to ensure that you can always maintain a firm grip and safely control your machine.
!Warning!
Removal of safety devices can lead to serious injury.
Always spray the cutter blades with STIHL resin solvent before starting work - with the engine stopped! You can obtain this protective spray from your dealer. Apply generously.
Fueling
Your STIHL hedge trimmer uses an oil-gasoline mixture for fuel (see the chapter on "Fuel" of your owner's manual).
!Warning!
Gasoline is an extremely flammable fuel. If spilled
or ignited by a spark or other ignition source, it can cause fire and serious burn injury or property
damage.
Use extreme caution when handling gasoline or fuel mix.
Do not smoke or bring any fire or flame near the fuel.
Fueling Instructions
Fuel your hedge trimmer in well ventilated areas, outdoors.
!Warning!
Gasoline vapor pressure may build up inside the gas tank of a two cycle engine depending on the fuel used, the weather conditions, and the venting system of the tank. In order to reduce the risk of burns or other personal injury from escaping gas vapor and fumes, remove the fuel filler cap on your hedge trimmer carefully so as to allow any pressure build-up in the tank to release slowly. Never remove fuel filler cap while engine is running. Select bare ground for fueling and move at least 10 feet (3 m) from the fueling spot before starting the engine.
Wipe off any spilled fuel before starting your hedge trimmer and check for leakage.
Check for fuel leakage while refueling and during operation. If fuel leakage is found, do not start or run the engine until leak is fixed and spilled fuel has been wiped away. Take care not to get fuel on your clothing. If this happens,
change your clothing immediately. Never attempt to fuel a running or hot engine.
6 |
HS 85 |
English / USA
!Warning!
Unit vibrations can cause an improperly
tightened fuel cap to
loosen or come off and
spill quantities of fuel. In order to reduce risk of
fuel spillage and fire, tighten fuel cap by hand with as much force as possible.
Starting
!Warning!
Your hedge trimmer is a one-person machine. Start and operate your hedge trimmer without assistance.
!Warning!
To reduce the risk of injury from blade contact, do not attempt to "drop start" your hedge trimmer. For specific starting instructions, see the appropriate section of your manual.
367BA007 LÄ
Place the hedge trimmer on firm ground or other solid surface in an open area. Maintain a good balance and secure footing. To reduce the risk of injury from blade contact or loss of control always engage the starting lock before starting. When the engine starts at startingthrottle, engine speed will be fast enough for the clutch to engage and move the cutting tool.
When you pull the starter grip, don't wrap the starter rope around your hand. Do not allow the grip to snap back, but guide the starter rope to rewind properly. Failure to follow this procedure may result in injury to hand or fingers and may damage the starter mechanism.
Working Conditions
!Warning!
To reduce the risk of injury from inhalation of
poisonous fumes, operate and start your hedge trimmer only outdoors in a ventilated area.
Hold your hedge trimmer in such a way that you do not breathe in the exaust fumes. Operate the hedge trimmer under good visibility and daylight conditions only.
Work carefully. Take particular care in slippery conditions and on slopes.
Be careful on uneven ground. Watch out for stumps, roots, ditches or holes which could cause you to trip or stumble.
Before you start work, examine the hedge area for stones, fence wire, metal or other solid objects which could damage the cutter blades.
HS 85 |
7 |
English / USA
Operating instructions
Do not cut any material other than hedges and shrubs. The cutting tools may be used only for the operations described in your manual.
367BA019 KN
!Warning
To reduce the risk of injury from loss of control, always hold your hedge trimmer firmly with both hands while you are working. Your right hand should grip the front handle. This also applies to lefthanders. Wrap your fingers tightly around the front and rear handles.
!Warning
Never attempt to operate any hedge trimmer with one hand. Loss of control of the hedge trimmer may result in serious or fatal injury.
Make sure you always have good footing. Always work calmly and carefully, stay alert so as not to endanger others. When working close to the ground, make sure that no sand, grit or stones get between the cutter blades. If the cutter blades become jammed by thick branches or any other obstruction, switch off the engine immediately before attempting to free the blades.
!Warning
To reduce the risk of injury from loss of control, never work on a ladder, in a tree or any other insecure support.
Never use the hedge trimmer above shoulder height or with one hand.
!Warning
The cutter blades tend to run on for a short period after the throttle
trigger is released (flywheel effect).
Important adjustments
!Warning
To reduce the risk of personal injury from loss of control or contact with the running cutting blades, do not use a hedge trimmer with incorrect idle adjustment.
At correct idle speed, the cutting blades should not move. For directions to adjust idle speed, see the appropriate section of your owner's manual.
If you cannot set the correct idle speed, have your STIHL dealer check your hedge trimmer and make proper adjustments or repairs.
MAINTENANCE, REPAIR AND STORING
Maintenance, replacement, or repair of the emission control devices and systems may be performed by any nonroad engine repair establishment or individual. However if you claim warranty for a component which has not been serviced or maintained properly or if nonapproved replacement parts were used, STIHL may deny warranty.
Use only STIHL replacement parts for maintenance and repair. Use of parts manufactured by others may cause serious or fatal injury.
Follow the maintenance and repair instructions in the appropriate section of your owner's manual. Refer to the maintenance chart at the last pages of this manual.
8 |
HS 85 |
English / USA
!Warning
Always stop the engine and make sure that the cutting tool is stopped before doing any maintenance or repair work or cleaning the hedge trimmer. Do not attempt any maintenance or repair work not described in your owner's manual. Have such work performed at your STIHL service shop only.
!Warning
Never repair damaged cutting attachments by welding, straightening or modifying the shape. This may cause parts of the cutting tool to come off and result in serious or fatal injuries.
Check condition of cutting tool at regular short intervals. If behavior of tool changes, check it immediately for tightness or any signs of cracks in particular. Replace damaged or dull cutting tools immediately, even if they have only superficial cracks.
!Warning
Never test the ignition system with ignition wire terminal removed from spark plug or with unseated spark plug, since uncontained sparking may cause a fire.
To reduce the risk of fire and burn injury, use only spark plugs authorized by STIHL. Always press spark plug boot snugly onto spark plug terminal of the proper size. (Note: If terminal has detachable SAE adapter nut, it must be attached.) A loose connection between spark plug terminal and ignition wire connector in the boot may create arcing that could ignite combustible fumes and cause a fire. Keep spark plug clean, and make sure ignition lead is in good condition.
!Warning
To reduce the risk of fire, check fuel filler cap for leaks at regular intervals.
Always clean dust and dirt off the machine after finishing work. Do not use a grease solvent for cleaning!
An aerosol can of resin solvent (protective spray), Part No. 0782 420 1002, is available for spraying the cutter blades. This resin solvent protects the cutter blades and has anticorrosive properties. Spray the cutter blades before and after work. Then start and run the hedge trimmer briefly so that the resin solvent is evenly distributed over the blades.
If the hedge itself is very dusty and dirty, spray the cutter blades more frequently. This greatly reduces blade friction and the damaging effects of sap and dust particles.
!Warning
Do not operate your hedge trimmer if the muffler is damaged, missing or modified. An improperly maintained muffler will increase the risk of fire and hearing loss. Never touch a hot muffler or burn will result. If your muffler was equipped with a spark-arresting screen to reduce the risk of fire (e.g. in the USA, Canada and Australia), never operate your hedge trimmer if the screen is missing or damaged. Remember that the risk of forest fires is greater in hot or dry weather. Keep the engine and muffler free from cuttings, chips, leaves, fibers and excess lubricant.
HS 85 |
9 |
English / USA
!Warning
In order to reduce the risk of fire, do not modify or remove any part of the muffler or spark arresting.
Keep cutting tool sharp. Tighten all nuts, bolts and screws except the carburetor adjustment screws after each use.
Keep spark plug and wire connection tight and clean. The spark plug electrode gap should be checked with a feeler gauge at least every 50 operating hours and reset if necessary. Fit a new spark plug if the electrodes are badly pitted.
For any maintenance please refer to the maintenance chart and to the warranty statement near the end of this manual.
Store hedge trimmer in a dry, high or locked location out of reach of children. Before storing for longer than a few days, always empty the fuel tank.
Using the Unit
Cutting season
Observe all country-specific and local regulations and ordinances regarding hedge trimming.
Do not use your hedge trimmer during other people's rest periods.
Preparations
Before starting work, scare away small animals so that they cannot be injured.
Use lopping shears to cut out thick branches first.
Cutting sequence
If a radical cut is necessary, cut a little at a time in several passes.
Cut both sides of the hedge first, then the top.
KN367BA010 |
Cutting techniques
Vertical cut:
To cut the sides of a hedge, swing the cutting blade from the bottom upward in an arc - lower the nose of the cutting blade, move along and then swing the cutting blade upward again.
10 |
HS 85 |
0 - 10° KN
367BA011
Horizontal cut:
Hold the cutting blade at an angle of 0° to 10° as you swing the hedge trimmer horizontally.
Swing the blade in an arc towards the outside of the hedge so that the cuttings are swept on to the ground.
Do not throw cuttings in the rubbish bin (garbage can) - they can be composted!
Fuel
This engine is certified to operate on unleaded gasoline and the STIHL twostroke engine oil at a mix ratio of 50:1.
Your two-stroke engine requires a mixture of high-quality gasoline and quality two-stroke air cooled engine oil.
Use mid-grade unleaded gasoline with a minimum octane rating of 89 (R+M/2). If the octane rating of the mid-grade gasoline in your area is lower, use premium unleaded fuel.
Fuel with a lower octane rating may increase engine temperatures. This, in turn, increases the risk of piston seizure and damage to the engine.
The chemical composition of the fuel is also important. Some fuel additives not only detrimentally affect elastomers (carburetor diaphragms, oil seals, fuel lines, etc.), but magnesium castings and catalytic converters as well. This could cause running problems or even damage the engine. For this reason STIHL recommends that you use only nationally recognized high-quality unleaded gasoline!
English / USA
Use only STIHL two-stroke engine oil or equivalent high-quality two-stroke engine oils that are designed for use only in air cooled two-cycle engines.
We recommend STIHL 50:1 two-stroke engine oil since it is specially formulated for use in STlHL engines.
Do not use BIA or TCW rated (twostroke water cooled) mix oils or other mix oils that state they are for use in both water cooled and air cooled engines (e.g., outboard motors, snowmobiles, chainsaws, mopeds, etc.).
Take care when handling gasoline. Avoid direct contact with the skin and avoid inhaling fuel vapor. When filling at the pump, first remove the canister from your vehicle and place the canister on the ground before filling. Do not fill fuel canisters that are sitting in or on a vehicle.
The canister should be kept tightly closed in order to avoid any moisture getting into the mixture.
The machine‘s fuel tank and the canister in which fuel mix is stored should be cleaned as necessary.
HS 85 |
11 |
English / USA
Fuel mix ages
Only mix sufficient fuel for a few days work, not to exceed 3 months of storage. Store in approved fuel-canisters only. When mixing, pour oil into the canister first, and then add gasoline. Close the canister and shake it vigorously by hand to ensure proper mixing of the oil with the fuel.
Gaso- |
Oil (STIHL 50:1 or |
|
line |
equivalent high-quality oils) |
|
US gal. |
US fl.oz |
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1 |
2.6 |
2 1/2 |
6.4 |
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5 |
12.8 |
|
Dispose of empty mixing-oil canisters only at authorized disposal locations.
Fueling |
366BA006 KN |
Before fueling, clean the filler cap and the area around it to ensure that no dirt falls into the tank.
Always thoroughly shake the mixture in the canister before fueling your machine.
In order to reduce the risk of burns or other personal injury from
escaping gas vapor and fumes, remove the fuel filler cap carefully so as to allow any pressure build-up in the tank to release slowly.
After fueling, tighten fuel cap
as securely as possible by hand.
366BA007 KN |
Change the fuel pick up body every year.
Before storing your machine for a long period, drain and clean the fuel tank and run engine until carburetor is dry.
12 |
HS 85 |
English / USA
Starting / Stopping
the Engine
4
2 3
1 
367BA006 KN
Observe safety precautions
Start as follows
:Move the blade lock lever (1) to z
:Move the slide control (2) to #
:Squeeze the throttle trigger (3) and move the slide control to START at the same time.
:Release the throttle trigger.
:Let go of the slide control, this is the starting throttle position.
|
KN |
4 |
366BA010 |
|
:Set the choke lever (4):
For cold start to |
g |
For warm start to |
e |
5
366BA011 KN
:Press fuel pump bulb (5) at least five times – even if bulb is filled with fuel.
367BA012 KN
:Put your hedge trimmer on firm ground.
:Remove the blade scabbard.
!Make sure that the cutting blades are not touching the ground or any other obstacles.
:Make sure you have a firm footing.
:Place your left foot on the housing.
:Hold the unit firmly on the ground with your left hand on the control handle.
HS 85 |
13 |
English / USA
:Pull the starter grip slowly with your right hand until you feel it engage and then give it a brisk strong pull. 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 it can rewind properly.
:When engine begins to fire: Move choke lever to e and continue cranking.
:As soon as engine runs, immediately blip the throttle trigger so that the slide control moves to # and the engine settles down to idling speed.
:Move the blade lock lever to z
To stop the engine:
:Move slide control to O
At very low outside temperatures: Allow engine to warm up.
:As soon as the engine runs:
:Blip the throttle trigger so that the slide control moves to # and the engine settles down to idling speed.
:Open the throttle slightly – warm up engine for short period.
If the engine does not start:
:If you did not move the choke lever to e quickly enough after the engine began to fire, the combustion chamber has flooded.
7
367BA020 KN
:Pull off the spark plug boot (7).
:Unscrew and dry off the spark plug.
:Move the slide control to O
:Open the throttle wide.
:Crank the engine several times with the starter to clear the combustion chamber.
:Refit the spark plug and connect the boot - push it down firmly.
:Move the slide control to #
:Set the choke lever to e – even if the engine is cold.
:Now start the engine.
Fuel tank run until dry and then refueled
5
366BA011 KN
:Press the fuel pump bulb (5) at least five times - even if bulb is filled with fuel.
:Now start the engine.
14 |
HS 85 |
|
English / USA |
Cleaning the Air Filter |
Motor Management |
2 |
1 |
326BA015 KN |
Dirty air filters reduce engine power, increase fuel consumption and make starting more difficult.
If there is a noticeable loss of engine power
:Move choke lever to g
:Press in the tab (1).
:Ease the filter cover (2) over the tab and take it away.
:Clean away loose dirt from around the filter.
:Remove the foam and felt filter elements.
2 |
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KN |
3 |
355BA031 |
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4 |
5 |
|
355BA032 KN |
:Wash the foam element in a clean, non-flammable cleaning solution (e.g. warm soapy water) and then dry.
:Fit new felt element.
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.
Replace damaged parts.
:Install the foam element (3) in the filter cover (2).
:Place felt element (4) (lettering facing inward) in filter housing (5).
:Fit filter cover so that it snaps into position.
Exhaust emissions are controlled by the design of the fundamental engine parameters and components (e.g. carburation, ignition, timing and valve or port timing) without the addition of any major hardware.
HS 85 |
15 |
English / USA
Adjusting the Carburetor
Your carburetor does not have a high speed adjusting screw (H screw). Adjustment of maximum engine speed is not necessary.
The carburetor is set at the factory to provide an optimum fuel-air mixture under most operating conditions.
Idling and part-load emissions are minimized by limiting the idle mixture.
: Check the cutting blades and clean if necessary (they must be clean, move freely and not be bent or warped).
: Check the air filter and clean it if necessary.
: Warm up the engine.
: Carefully screw the low speed screw (L) down onto its seat. Then open it one turn counterclockwise (standard setting, L = 1).
Adjusting Idle Speed
Engine stops while idling:
Check standard setting.
(L screw must be one turn open)
:Turn idle speed screw (LA) slowly clockwise until the cutting blades start running and then turn one half turn counterclockwise.
Cutting blades run when engine is idling:
Check standard setting.
(L screw must be one turn open)
:Turn idle speed screw (LA) slowly counterclockwise until the cutting blades stop running at idle speed and turn the screw about another one half turn in the same direction.
16 |
HS 85 |
|
English / USA |
Spark Arresting Screen in |
Checking the Spark Plug |
Muffler |
|
1
366BA026 KN
2
KN366BA027
If the engine is low on power, check the spark arresting screen* inside the muffler.
Warning: Wait for the engine to cool down completely before performing this work.
:Remove the shroud. Take out the screw (1).
:Remove the spark arresting screen (2).
* see “Guide to Using this Manual”
HS 85
:Clean spark arresting screen if necessary.
:If screen is damaged or coked up, fit a new one.
:Refit the spark arresting screen.
: Fit the shroud.
000BA002 KN
Wrong fuel mix (too much engine oil in the gasoline), a dirty air filter and unfavorable running conditions (mostly at part throttle etc.) affect the condition of the spark plug. These factors cause deposits to form on the insulator nose which may result in trouble in operation.
17
English / USA
If engine is down on power, difficult to start or runs poorly at idling speed, first check the spark plug.
:Remove spark plug – see “Starting / Stopping the Engine“.
:Clean dirty spark plug.
:Check electrode gap (A) and readjust if necessary – see "Specifications".
:Use only resistor type spark plugs of the approved range.
Rectify problems which have caused fouling of spark plug:
:Too much oil in fuel mix.
:Dirty air filter.
:Unfavorable running conditions, e.g. operating at part load.
Fit a new spark plug after approx. 100 operating hours
or earlier if the electrodes are badly eroded.
|
Lubricating |
|
Gearbox |
|
1 |
|
2 |
1 |
|
000BA036 TR |
367BA021 KN |
To reduce the risk of fire and burn injury, use only spark plugs authorized by STIHL. Always press spark plug boot (2) snugly onto spark plug terminal (1) of the proper size. (Note: If terminal has detachable SAE adapter nut, it must be attached.)
A loose connection between spark plug boot and ignition wire connector in the boot may create arcing that could ignite combustible fumes and cause a fire.
Use STIHL gear lubricant for hedge trimmers (see "Specifications")
to lubricate the blade drive gear about every 25 hours of operation.
:Remove screw plug (1) from gear housing.
:Screw the tube of grease (2) into the filler hole.
:Roll up the end of the tube to the next division on the scale. This forces about 3/4 oz (20 g) grease into the gearbox.
:Refit screw plug and tighten securely.
18 |
HS 85 |
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