Stihl HL 100 User manual

{
STIHL HL 100 Instruction Manual
Notice d’emploi

GInstruction Manual
1 - 30
FNotice d’emploi
31 - 63

Original Instruction ManualPrinted on chlorine-free paper
Printing inks contain vegetable oils, paper can be recycled.
© ANDREAS STIHL AG & Co. KG, 2016 0458-388-8221-E. VA0.A16. 0000000575_009_GB
HL 100, HL 100 K
English
1
{This instruction manual is protected by copyright. All rights reserved, especially the rights to reproduce, translate and process
with electronic systems.
Contents
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 troublefree use of
the product.
Please contact your dealer or our sales
company if you have any queries
concerning this product.
Your
Dr. Nikolas Stihl
Guide to Using this Manual 2
Safety Precautions and Working
Techniques 2
Using the Unit 8
Approved Power Tool Attachments 10
Assembling the Unit 11
Fuel 12
Fueling 13
Adjusting the Cutter Bar 14
Fitting the Harness 15
Starting / Stopping the Engine 16
Operating Instructions 18
Cleaning the Air Filter 18
Engine Management 18
Adjusting the Carburetor 19
Spark Arresting Screen in Muffler 19
Spark Plug 20
Lubricating the Gearbox 21
Sharpening Instructions 22
Storing the Machine 22
Maintenance and Care 23
Main Parts 25
Specifications 27
Maintenance and Repairs 27
Disposal 28
STIHL Limited Emission Control
Warranty Statement 28

HL 100, HL 100 K
English
2
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.
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 we may modify the design,
engineering and appearance of our
products periodically.
Therefore, some changes, modifications
and improvements may not be covered
in this manual.
Observe all applicable local safety
regulations, standards and ordinances.
If you have not used this type of power
tool before: Have your dealer or other
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.
Guide to Using this Manual
Fuel tank; fuel mixture of
gasoline and engine oil
Operate manual fuel
pump
Filler hole for gear
lubricant
Blade lock
Rotating handle
Safety Precautions and
Working Techniques
Because a hedge trim-
mer 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 man-
ual 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.

HL 100, HL 100 K
English
3
Do not lend or rent your power tool
without the instruction manual. Be sure
than anyone using your power tool
understands the information contained
in this manual.
The use of noise emitting power tools
may be restricted to certain times by
national or local regulations.
To operate the power tool you must be
rested, in good physical condition and
mental health.
If you have any condition that might be
aggravated by strenuous work, check
with your doctor before operating a
power tool.
Persons with pacemakers only: The
ignition system of your power tool
produces an electromagnetic field of a
very low intensity. This field may
interfere with some pacemakers. STIHL
recommends that persons with
pacemakers consult their physician and
the pacemaker manufacturer to reduce
any health risk.
Do not operate the power tool if you are
under the influence of any substance
(drugs, alcohol) which might impair
vision, dexterity or judgment.
Use your hedge trimmer only for cutting
hedges, shrubs, scrub and similar
materials.
It must not be used for any other
purpose because of the increased risk of
accidents and damage to the machine.
Never attempt to modify your power tool
in any way since this may result in
accidents or damage to the machine.
Only use cutting blades and accessories
that are explicitly approved for this
power tool by STIHL or are technically
identical. If you have any questions in
this respect, consult a servicing dealer.
Use only high quality tools and
accessories in order to avoid the risk of
accidents and damage to the machine.
STIHL recommends the use of genuine
STIHL tools and accessories. They are
specifically designed to match the
product and meet your performance
requirements.
Never attempt to modify your machine in
any way since this may increase the risk
of personal injury. STIHL excludes all
liability for personal injury and damage
to property caused while using
unauthorized attachments.
Do not use a pressure washer to clean
your power tool. The solid jet of water
may damage parts of the power tool.
Do not spray the machine with water.
Clothing and Equipment
Wear proper protective clothing and
equipment.
WARNING
Wear hearing protection, e.g. earplugs
or ear muffs.
Wear a safety hard hat with chin strap
where there is a danger of head injuries
from falling objects.
STIHL offers a comprehensive range of
personal protective clothing and
equipment.
Clothing must be sturdy
but allow complete free-
dom of movement. Wear
snug-fitting clothing, an
overall and jacket combi-
nation, do not wear a
work coat.
Avoid clothing that could
get caught on branches
or brush or moving parts
of the machine. Do not
wear a scarf, necktie or
jewelry. Tie up and con-
fine long hair (e.g. with a
hair net, cap, hard hat,
etc.).
Wear steel-toed safety
boots with non-slip soles.
To reduce the risk of eye
injuries, wear close-fit-
ting safety glasses in
accordance with Euro-
pean Standard EN 166.
Make sure the safety
glasses are a comforta-
ble and snug fit.
Wear heavy-duty work
gloves made of durable
material (e.g. leather).

HL 100, HL 100 K
English
4
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 adjustable cutter bar:
Engage the cutter bar in position.
On units with a defined transport
position: Move the cutter bar to the
transport position and make sure it is
properly engaged.
Carry the power tool properly balanced
by the drive tube – cutting blades behind
you.
To reduce the risk of serious burn
injuries, avoid touching hot parts of the
machine, including the gearbox housing.
Transporting by vehicle: Properly secure
your power tool to prevent turnover, fuel
spillage and damage.
Fueling
Always shut off the engine before
refueling.
Do not fuel a hot engine – 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.
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 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.
–Slide control / stop switch must
move easily to STOP or 0.
–Smooth action of throttle trigger
lockout and throttle trigger – the
throttle trigger must return
automatically to the idle position.
–Check that the spark plug boot is
secure – a loose boot may cause
arcing that could ignite combustible
fumes and cause a fire.
–Cutting blades securely mounted
and in good condition (clean, move
freely, not warped), properly
sharpened and thoroughly sprayed
with STIHL resin solvent (lubricant).
–On units with 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 shoulder strap and handles
to suit your height and reach. See
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 or full
harness: 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.
Gasoline is an extremely
flammable fuel. Keep
clear of naked flames. Do
not spill any fuel – do not
smoke.
After fueling, tighten
down the fuel tank cap as
securely as possible.

HL 100, HL 100 K
English
5
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).
Holding and Controlling the Power Tool
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 by moving the slide control
/ stop switch to 0 or STOP.
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.
388BA041 KN
388BA026 KN
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 mov-
ing blades or falling
cuttings, do not
allow bystanders
within 5 meters of
your own position.
5m (17ft)

HL 100, HL 100 K
English
6
Watch out for obstacles: Roots and tree
stumps which could cause you to trip or
stumble.
Make sure you always have good
balance and secure footing.
When working at heights:
–Always use a lift bucket
–Never work on a ladder or in a tree
–Never work on an insecure support
–Never operate your power tool with
one hand
Be particularly alert and cautious when
wearing hearing protection because
your ability to hear warnings (shouts,
alarms, etc.) is restricted.
To reduce the risk of accidents, take a
break in good time to avoid tiredness or
exhaustion.
Work calmly and carefully – in daylight
conditions and only when visibility is
good. Stay alert so as not to endanger
others.
To reduce the risk of serious or fatal
injury from breathing toxic fumes,
ensure proper ventilation when working
in trenches, hollows or other confined
locations.
To reduce the risk of accidents, stop
work immediately in the event of
nausea, headache, visual disturbances
(e.g. reduced field of vision), problems
with hearing, dizziness, deterioration in
ability to concentrate. Apart from other
possibilities, these symptoms may be
caused by an excessively high
concentration of exhaust gases in the
work area.
Operate your power tool so that it
produces a minimum of noise and
emissions – do not run the engine
unnecessarily, accelerate the engine
only when working.
To reduce the risk of fire, do not smoke
while operating or standing near your
power tool. Note that combustible fuel
vapor may escape from the fuel system.
The dusts, vapor and smoke produced
during operation may be dangerous to
health. If the work area is very dusty or
smoky, wear a respirator.
If your power tool is subjected to
unusually high loads for which it was not
designed (e.g. heavy impact or a fall),
always check that it is in good condition
before continuing work – see also
"Before Starting". Check the fuel system
in particular for leaks and make sure the
safety devices are working properly. Do
not continue operating your power tool if
it is damaged. In case of doubt, consult
your servicing dealer.
Do not operate your power tool in the
starting throttle position – engine speed
cannot be controlled in this position.
Inspect the hedge and work area to
avoid damaging the cutting blades:
–Remove stones, rocks, pieces of
metal and other solid objects.
–When working close to the ground,
make sure that no sand, grit or
stones get between the blades.
–Take particular care when cutting
hedges next to or against wire
fences.
To avoid the risk of electrocution, do not
touch electric power lines – never cut
through electric power lines.
Opening the throttle while the blades are
blocked increases the load and reduces
engine speed. The clutch then slips
continuously and this causes
overheating and damage to important
components (e.g. clutch, polymer
housing components) – and this can
increase the risk of injury from the
blades moving while the engine is idling.
Your power tool produces
toxic exhaust fumes as
soon as the engine is
running. These fumes
may be colorless and
odorless and contain
unburned hydrocarbons
and benzol. Never run
the engine indoors or in
poorly ventilated loca-
tions, even if your model
is equipped with a cata-
lytic converter.
The gearbox becomes
hot during operation. To
reduce the risk of burn
injury, do not touch the
gearbox housing.
Do not touch the cutting
blades while the motor is
running. If the cutting
blades become jammed
by thick branches or
other obstructions, switch
off the engine immedi-
ately before attempting to
free the blades – there is
otherwise a risk of injury.

HL 100, HL 100 K
English
7
If the hedge is very dusty or dirty, spray
the blades with STIHL resin solvent from
time to time during cutting. This helps
greatly reduce blade friction as well as
the aggressive effects of sap and the
build-up of dirt particles.
Before leaving the power tool
unattended: Shut off the engine.
Check the cutting blades at regular short
intervals during operation or
immediately if there is a noticeable
change in cutting behavior:
–Shut off the engine.
–Wait until the cutting blades have
come to a complete standstill.
–Check condition and tightness, look
for cracks.
–Check sharpness.
To reduce the risk of fire, always clean
plant residue, chips, leaves and excess
lubricant off the engine and muffler.
After Finishing Work
Always clean dust and dirt off the
machine – do not use any grease
solvents for this purpose.
Spray the blades with STIHL resin
solvent. Run the engine briefly so that
the solvent is evenly distributed.
Vibrations
Prolonged use of the power tool may
result in vibration-induced circulation
problems in the hands (whitefinger
disease).
No general recommendation can be
given for the length of usage because it
depends on several factors.
The period of usage is prolonged by:
–Hand protection (wearing warm
gloves)
–Work breaks
The period of usage is shortened by:
–Any personal tendency to suffer
from poor circulation (symptoms:
frequently cold fingers, tingling
sensations).
–Low outside temperatures.
–The force with which the handles
are held (a tight grip restricts
circulation).
Continual and regular users should
monitor closely the condition of their
hands and fingers. If any of the above
symptoms appear (e.g. tingling
sensation in fingers), seek medical
advice.
Maintenance and Repairs
Service the machine regularly. Do not
attempt any maintenance or repair work
not described in the instruction manual.
Have all other work 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.
Only use high-quality replacement parts
in order to avoid the risk of accidents
and damage to the machine. If you have
any questions in this respect, consult a
servicing dealer.
STIHL recommends the use of genuine
STIHL replacement parts. They are
specifically designed to match your
model and meet your performance
requirements.
To reduce the risk of injury, always shut
off the engine before carrying out any
maintenance or repairs or cleaning the
machine. – Exception: Carburetor and
idle speed adjustments.
Do not turn the engine over on the
starter with the spark plug boot or spark
plug removed unless the slide control /
stop switch is on STOP or 0 since there
is otherwise a risk of fire from
uncontained sparking.
To reduce the risk of fire, do not service
or store your machine near open flames.
Check the fuel filler cap for leaks at
regular intervals.
Use only a spark plug of the type
approved by STIHL and make sure it is
in good condition – see "Specifications".
Inspect the ignition lead (insulation in
good condition, secure connection).
Check the condition of the muffler.
To reduce the risk of fire and damage to
hearing, do not operate your machine if
the muffler is damaged or missing.
Do not touch a hot muffler since burn
injury will result.
Vibration behavior is influenced by the
condition of the AV elements – check the
AV elements at regular intervals.

HL 100, HL 100 K
English
8
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 make a
warranty claim for a component which
has not been serviced or maintained
properly or if nonapproved replacement
parts were used, STIHL may deny
coverage.
For any maintenance please refer to the
maintenance chart and to the warranty
statement near the end of the instruction
manual.
Cutting Season
Observe country-specific or municipal
rules and regulations for cutting hedges.
Do not use your hedge trimmer during
rest periods customary in the
neighborhood.
Cutting Sequence
If a radical cut is necessary, cut a little at
a time in several stages.
Use lopping shears to cut out thick
branches first.
Cut the sides of the hedge first, then the
top.
Disposal
Do not throw cuttings into the garbage
can – they can be composted.
Working Technique
Horizontal Cut (with cutter bar at an
angle)
Cutting close to the ground from a
standing position, e.g. low shrubs.
WARNING
The K version (HL 100 K) is not
approved for cutting close to the ground.
Using the Unit
388BA029 KN

HL 100, HL 100 K
English
9
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 angle of
adjustable cutter bar to maximum so that
the unit can be held in a lower, less tiring
position (with shoulder strap) while still
providing adequate reach.
388BA030 KN
389BA050 KN
388BA031 KN

HL 100, HL 100 K
English
10
Horizontal Cut (with straight cutter bar)
Cutting without standing directly next to
the hedge, e.g. flowerbed between
operator and hedge.
Hold the cutter bar at an angle of 0° to
10° as you swing the hedge trimmer
horizontally.
Swing the cutter bar in an arc towards
the outside of the hedge so that the
cuttings are swept to the ground.
The following STIHL attachments may
be mounted to the basic power tool:
388BA033 KN
Approved Power Tool
Attachments
228BA077 KN
BF
FH
FCS
KB KW
HT
Interchangeable
Attachment
1) Must not be mounted to versions
with short shaft (HL 100 K)
2) Loop handle required
3) May be mounted to versions with
handle hose and long shaft
(HL 100)
Application
FCS 1) 2) Edger
FH 1) 2) Power scythe
HL 0° Long reach hedge
trimmer
HL 135° 2) Long reach hedge
trimmer
HT 1) 3) Pole pruner
BF 1) 2) Pick tines
KB (4601) 1) 2) Bristle brush
KW (4601) 1) 2) PowerSweep

HL 100, HL 100 K
English
11
Mounting the Loop Handle
Necessary on versions with long drive
tube and 135° adjustable cutter bar (not
on HL 100 K).
NPlace 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).
NPlace the clamp (6) against the
drive tube.
NLine up the holes.
NInsert the screws (7) with
washers (8).
NFit the square nuts (9) and screw
home the screws.
NAlign the loop handle (2) and move
it to the most comfortable position.
Distance (A) must not be more than
55 cm (recommended: about 35 cm).
NTighten down the screws firmly.
Mounting the Gearbox
NLoosen the clamp screws (9).
NPush the gearbox (10) onto the
drive tube (5), turn the gearbox (10)
back and forth as necessary.
Assembling the Unit
7
8
2
388BA034 KN
1
6
7
8
9
9
3
388BA035 KN
2
A

HL 100, HL 100 K
English
12
Once the end of the drive tube is
inserted beyond the slot in the
clamp (11):
NPush the gearbox (10) fully home as
far as stop.
NTighten down the clamp screws
moderately.
NLine up the gearbox (10).
NTighten down the clamp screws
firmly.
This engine is certified to operate on
unleaded gasoline and the STIHL two-
stroke engine oil at a mix ratio of 50:1.
Your engine requires a mixture of high-
quality gasoline and two-stroke air
cooled engine oil.
Use mid-grade unleaded gasoline with a
minimum octane rating of 89 ((R+M)/2)
and no more than 10% ethanol content.
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
high-quality unleaded gasoline!
Gasoline with an ethanol content of
more than 10% can cause running
problems and major damage in engines
and should not be used.
The ethanol content in gasoline affects
engine running speed – it may be
necessary to readjust the carburetor if
you use fuels with various ethanol
contents.
WARNING
To reduce the risk of personal injury
from loss of control and / or contact with
the running cutting tool, do not use your
unit with incorrect idle adjustment. At
correct idle speed, the cutting tool
should not move.
If your power tool shows an incorrect idle
adjustment, have your STIHL dealer
check your power tool and make proper
adjustments and repairs.
The idle speed and maximum speed of
the engine change if you switch from a
fuel with a certain ethanol content to
another fuel with a much higher or lower
ethanol content.
This problem can be avoided by always
using fuel with the same ethanol
content.
Use STIHL HP Ultra oil or ask your
dealer for an equivalent high quality oil
to ensure the maximum performance of
the product for the full lifetime.
To meet the requirements of EPA
40CFR90/1054 we recommend to use
STIHL HP Ultra oil.
Do not use BIA or TCW rated (two-
stroke 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,
chain saws, 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 container
from your vehicle and place the
container on the ground before filling. To
reduce the risk of sparks from static
discharge and resulting fire and/or
explosion, do not fill fuel containers that
are sitting in or on a vehicle or trailer.
10
388BA036 KN
11
Fuel

HL 100, HL 100 K
English
13
The container should be kept tightly
closed in order to limit the amount of
moisture that gets into the mixture.
The machine’s fuel tank should be
cleaned as necessary.
Fuel mix ages
Only mix sufficient fuel for a few days
work, not to exceed 30 days of storage.
Store in approved fuel-containers only.
When mixing, pour oil into the container
first, and then add gasoline. Close the
container and shake it vigorously by
hand to ensure proper mixing of the oil
with the fuel.
Dispose of empty mixing-oil containers
only at authorized disposal locations.
Preparations
NBefore fueling, clean the filler cap
and the area around it to ensure that
no dirt falls into the tank.
NPosition the machine so that the
tank cap faces up.
Opening the filler cap
NTurn the cap counterclockwise until
it can be removed from the tank
opening.
NRemove 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).
NFill up with fuel.
Closing the filler cap
NPlace the cap in the opening.
NTurn the cap clockwise as far as
stop and tighten it down as firmly as
possible by hand.
Gasoline Oil (STIHL 50:1 or equiva-
lent high-quality oils)
Liters Liters (ml)
10.02(20)
5 0.10 (100)
10 0.20 (200)
20 0.40 (400)
US gal. US fl.oz.
12.6
2 1/2 6.4
512.8
Fueling
266BA028 KN
2709BA003 KN
2709BA004 KN

HL 100, HL 100 K
English
14
135° Version
The angle of th cutter bar can be
adjusted upwards in 4 stages from 0°
(straight) to 45°, and downwards in 8
stages from 0° to 90° (right angle facing
down). There are therefore 13 possible
working positions.
There is also a special transport position
for the cutter bar.
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 becomes hot during
operation. To reduce the risk of burn
injury, do not touch the gear housing.
WARNING
To reduce the risk of injury, never touch
the blades while making adjustments.
NPull back the sliding sleeve (1) and
use the lever (2) to adjust the joint
by one or several holes.
NRelease the sliding sleeve (1) and
make sure the lock pin engages the
quadrant (3).
The sliding sleeve butts against the
housing when the pin is properly
engaged (after making adjustment).
Transport Position
The cutter bar can be folded flat against
the drive tube and locked in position to
save space during transportation.
WARNING
To reduce the risk of injury, always shut
off the engine – move slide control to
STOP or stop switch to 0 – and fit the
blade scabbard before moving the cutter
bar to the transport position or from the
transport position to the normal working
position.
WARNING
The gearbox becomes hot during
operation. To reduce the risk of burn
injury, do not touch the gear housing.
Adjusting the Cutter Bar

HL 100, HL 100 K
English
15
NShut off the engine.
NFit the blade scabbard.
NPull back the sliding sleeve (1) and
use the lever (2) to swing the joint
upwards – in direction of drive tube
– until the cutter bar is flat against
the drive tube.
NRelease the sliding sleeve (1) and
make sure the lock pin engages the
quadrant (3).
The sliding sleeve butts against the
housing when the pin is properly
engaged (after making adjustment).
Some versions of the machine can be
carried on a harness.
The type and style of the harness
depend on the market.
Shoulder strap
NPut on the shoulder strap (1).
NAdjust the length of the strap.
NWith the power tool attached, the
carabiner (3) must be at about the
same height as your right hip.
Full harness
NPut on the full harness (2).
NAdjust the length of the strap.
NWith the power tool attached, the
carabiner (3) must be at about the
same height as your right hip.
Fitting the Harness
1
388BA037 KN
3
2
388BA038 KN
3

HL 100, HL 100 K
English
16
Controls
1Throttle trigger lockout
2Throttle trigger
3Slide control
Positions of slide control
4STOP-0 – engine off – the ignition is
switched off
5F – normal run position – the engine
is running or can start
6START – ignition is switched on –
the engine can start
Symbol on slide control
7h – stop symbol and arrow. To stop
the engine, push the slide control in
the direction of the arrow on the stop
symbol (h) to STOP-0.
Starting
NPress down the trigger lockout lever
and squeeze the throttle trigger
Nand hold them in that position.
NMove the slide control to START
and hold it there.
NNow release the throttle trigger,
slide control and trigger interlock in
that order. This is the starting
throttle position.
NSet the choke knob (8):
For cold start to g
For warm start to e – also use this
position if the engine has been running
but is still cold.
NPress the manual fuel pump
bulb (9) at least five times – even if
the bulb is already filled with fuel.
NPut the unit on the ground: It must
rest securely on the engine support
and the gearbox.
NOn units with an adjustable cutter
bar and defined transport position:
Set the cutter bar to the straight (0°)
position.
NRemove the blade scabbard. Check
that the cutting tool is not touching
the ground or any other obstacles. If
necessary, rest the gearbox on a
raised support (e.g. mound, brick or
something similar).
NMake sure you have a firm footing.
NHold the unit with your left hand and
press it down firmly – your thumb
should be under the fan housing.
NOTICE
Do not stand or kneel on the drive tube
since it will otherwise be permanently
bent and damaged.
Starting / Stopping the
Engine
3
STOP
2
5
6
4
7
002BA181 KN
START
STOP-
1
249BA057 KN
9
8
388BA039 KN

HL 100, HL 100 K
English
17
NPull 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 to full
length – it might otherwise break.
NDo not let the starter grip snap back.
Guide it slowly back into the housing
so that the starter rope can rewind
properly.
NCrank the engine until it begins to
fire. After no more than five
attempts, turn the choke knob to e.
NContinue cranking.
NAs soon as the engine runs, blip the
throttle trigger so that the slide
control moves to the normal run
position F and the engine settles
down to idle speed.
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.
At very low outside temperatures
As soon as the engine runs:
NBlip the throttle trigger to disengage
the starting throttle position. The
slide control moves to the normal
run position F – and the engine
settles down to idle speed.
NOpen the throttle slightly and warm
up the engine for a brief period.
Stopping the engine
NPush the slide control in the
direction of the arrow on the stop
symbol (h) to STOP-0.
If engine does not start
Choke knob
If you did not turn the choke knob to e
quickly enough after the engine began to
fire, the combustion chamber is flooded.
NTurn the choke knob to e
NSet the slide control, lockout lever
and throttle trigger to the starting
throttle position and start the engine
by giving the starter rope a brisk
strong pull. 10 to 20 pulls may be
necessary.
If the engine still does not start
NMove the slide control to STOP-0.
NRemove the spark plug boot (10).
NUnscrew and dry off the spark plug.
NOpen the throttle wide and pull the
starter rope several times to clear
the combustion chamber.
NRefit the spark plug. Connect the
spark plug boot (press it down
firmly).
NMove the slide control to START.
NSet the choke knob to e – even if
the engine is cold.
NNow start the engine.
Adjusting the Throttle Cable
NCheck adjustment of throttle cable –
see chapter on "Adjusting the
Throttle Cable".
Fuel tank run until completely dry
NAfter refueling, press the manual
fuel pump bulb at least five times –
even if the bulb is filled with fuel.
NSet the choke knob according to
engine temperature.
NNow start the engine.
10
249BA058 KN

HL 100, HL 100 K
English
18
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".
If there is a noticeable loss of engine
power
NTurn the choke knob to g
NTake out the screw (1) and remove
the filter cover (2).
NClean away loose dirt from around
the filter.
NGrip the filter element (3) at the
cutout (arrow) in the filter
housing (4) and remove it.
NFit a new filter 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.
NReplace damaged parts.
Installing the filter
NInstall the filter element in the filter
housing and fit the cover.
NInsert the screw and tighten it down
firmly.
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.
Operating Instructions Cleaning the Air Filter
1
273BA006 KN
2
4
Engine Management