Stihl FS 100 RX User manual

{
STIHL HT 100, 101, 130, 131 Instruction Manual
Notice d’emploi

GInstruction Manual
1 - 41
FNotice d’emploi
42 - 86

Original Instruction ManualPrinted on chlorine-free paper
Printing inks contain vegetable oils, paper can be recycled.
© ANDREAS STIHL AG & Co. KG, 2015 0458-246-8221-E. VA5.A15. 0000000569_011_GB
HT 100, HT 101, HT 130, HT 131
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
Cutting Attachment 10
Mounting the Bar and Chain 11
Tensioning the Chain 12
Checking Chain Tension 12
Adjusting the Throttle Cable 13
4-MIX Engine 13
Fuel 13
Fueling 14
Chain Lubricant 16
Filling Chain Oil Tank 16
Checking Chain Lubrication 18
Adjusting the Telescoping Shaft 18
Fitting the Harness 19
Backpack Carrying System 19
Starting / Stopping the Engine 21
Operating Instructions 23
Taking Care of the Guide Bar 24
Cleaning the Air Filter 25
Engine Management 25
Adjusting the Carburetor 25
Spark Arresting Screen in Muffler 26
Spark Plug 27
Rewind Starter 28
Storing the Machine 28
Checking and Replacing the Chain
Sprocket 28
Maintaining and Sharpening the
Saw Chain 29
Inspections and Maintenance by
Dealer 33
Maintenance and Care 34
Main Parts 36
Specifications 38
Maintenance and Repairs 39
Disposal 39
STIHL Limited Emission Control
Warranty Statement 40

HT 100, HT 101, HT 130, HT 131
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 to
operate your machine 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
Chain oil tank; chain oil
Direction of chain rotation
Operate manual fuel
pump
Manual fuel pump
Safety Precautions and
Working Techniques
Special safety precau-
tions must be observed
when working with the
pole pruner because it is
a high-speed, fast-cut-
ting power tool with very
sharp cutters and a long
reach.
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.

HT 100, HT 101, HT 130, HT 131
English
3
Do not lend or rent your power tool
without the instruction manual. Be sure
that anyone using it 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 pole pruner for limbing only
(removing or pruning branches). Only
cut wood or wooden objects.
Do not use your power tool for any other
purpose because of the increased risk of
accidents.
Only use guide bars, chains, chain
sprockets and accessories that are
explicitly approved for this power tool
model 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, guide bars, chains, chain
sprockets 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
the unit. The solid jet of water may
damage parts of the unit.
Clothing and Equipment
Wear proper protective clothing and
equipment.
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 confine long hair
(e.g. with a hair net, cap, hard hat, etc.).
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.
Transporting the Power Tool
Always turn off the engine.
Always fit the chain guard (scabbard) –
even when you carry the unit for short
distances.
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.
Wear steel-toed safety
boots with non-slip soles
and cut-retardant inserts.
To reduce the risk of eye
injuries, wear snug-fitting
safety glasses in accord-
ance with European
Standard EN 166. Make
sure the safety glasses
are a good fit.
Wear heavy-duty work
gloves made of durable
material (e.g. leather).
390BA000 KN

HT 100, HT 101, HT 130, HT 131
English
4
Carry the power tool properly balanced
by the drive tube. To reduce the risk of
serious burn injuries, avoid touching hot
parts of the machine, especially the
surface of the muffler.
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.
Your power tool comes standard with
either a screw-type or bayonet-type fuel
cap.
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.
–Correctly mounted guide bar
–Correctly tensioned chain
–Slide control / stop switch must
move easily to STOP or 0.
–Smooth action of throttle trigger
lockout (if fitted) 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.
–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 harness 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.
Place the unit on firm ground in an open
area. Make sure you have good balance
and secure footing. Hold the unit
securely. The chain must be clear of the
ground and all other obstructions
because it may begin to run when the
engine starts.
Your power tool is designed to be
operated by one person only. To reduce
the risk of injury, do not allow other
persons within 15 meters of your own
position – even when starting.
Start the engine as described in the
instruction manual.
Gasoline is an extremely
flammable fuel. Keep
clear of naked flames. Do
not spill any fuel – do not
smoke.
After fueling, tighten
down the screw-type fuel
cap as securely as
possible.
Insert the fuel cap with
hinged grip (bayonet-type
cap) correctly in the
opening, turn it clockwise
as far as stop and fold the
grip down.

HT 100, HT 101, HT 130, HT 131
English
5
Note that the chain continues to run for a
short period after you let go of the
throttle trigger (flywheel effect).
Check idle speed setting: The chain
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 unit firmly with both
hands – right hand on the control handle,
left hand on the drive tube – even if you
are left-handed. Wrap your fingers
around the control handle and drive
tube.
Machines with telescoping shaft: Only
extend the telescoping shaft as far as
necessary for the cutting work that
needs to be done.
During Operation
Make sure you always have good
balance and secure footing.
In the event of impending danger or in
an emergency, switch off the engine
immediately by moving the slide control
/ stop switch to STOP or 0.
To reduce the risk of injury from falling
objects and thrown pieces of wood, do
not allow any other persons within a
radius of 15 meters of your own position.
To reduce the risk of damage to
property, also maintain this distance
from other objects (vehicles, windows).
Maintain a minimum clearance of
15 meters between the bar nose and
electric power lines. Electricity can jump
considerable distances by means of
arcing. Higher voltage increases the
distance electricity can arc. Have the
power switched off before starting
cutting work in the immediate vicinity of
power lines.
To reduce the risk of injury, shut off the
engine before changing the saw chain.
Make sure the idle speed setting is
correct. The chain must not run when
the engine is idling with the throttle
trigger released.
It the chain still rotates, have your dealer
make proper adjustments or repairs.
Check and correct the idle speed setting
regularly.
Never leave a running power tool
unattended.
Take special care in slippery conditions
(ice, wet ground, snow) – on slopes or
uneven ground.
Watch out for obstacles: Roots and tree
stumps which could cause you to trip or
stumble.
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
390BA026 KN
This power tool is not
insulated against electric
shock. To reduce the risk
of electrocution maintain
a minimum clearance of
15 meters from electric
power lines.
15m (50ft)
15m (50ft)

HT 100, HT 101, HT 130, HT 131
English
6
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 (e.g. sawdust), vapor and
smoke produced during operation may
be dangerous to health. If dust levels are
very high, wear a suitable 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.
If you use a shoulder strap, make sure
exhaust gases are diverted away from
your body since there is otherwise a risk
of fire.
Limbing
Hold the pole pruner at an angle. Do not
stand directly underneath the limb being
cut. Do not exceed an angle of 60° from
the horizontal. Watch for falling wood.
Keep the work area clear – remove
interfering limbs and brush.
Before limbing, establish a path of
escape and remove all obstacles.
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.
max60°
390BA025 KN

HT 100, HT 101, HT 130, HT 131
English
7
Position the cutting attachment with the
hook against the branch and then
perform the cross-cut. This reduces the
risk of the pruner being jerked forward
as you start the cross-cut.
Always start the cut with the engine at
full throttle.
Always cut with a correctly sharpened,
properly tensioned chain – the depth
gauge setting must not be too large.
Do not operate your power tool in the
starting throttle position – engine speed
cannot be controlled in this position.
Perform cross-cut from the top
downward to avoid the chain pinching in
the cut.
If branch is thick or heavy, make a
relieving cut – see chapter on "Using the
Pole Pruner".
To reduce the risk of injury, take special
care when cutting branches under
tension. Always make a relieving cut on
the compression side first and then
perform the bucking cut at the tension
side.
To reduce the risk of injury, take special
care when cutting shattered wood
because of the risk of injury from slivers
being caught and thrown in your
direction.
If on a slope, stand on the uphill side or
to one side of the branch to be cut.
Watch out for rolling branches.
Note when reaching the end of a cut that
the unit is no longer supported by the
guide bar in the cut. You have to take the
full weight of the machine since it might
otherwise go out of control.
Always pull the unit out of the cut with
the chain running.
To reduce the risk of accidents, use your
pole pruner for limbing and pruning only.
It is not designed for felling.
Make sure your saw chain does not
touch any foreign materials: Stones,
nails, etc. may be flung off and damage
the saw chain.
If the rotating chain makes contact with
a rock or other solid object there is a risk
of sparking which may cause easily
combustible material to catch fire under
certain circumstances. Dry plants and
scrub are also easily combustible,
especially in hot and dry weather
conditions. If there is a risk of fire, do not
use your pole pruner near combustible
materials, dry plants or scrub. Always
contact your local forest authority for
information on a possible fire risk.
Before leaving the power tool
unattended: Shut off the engine.
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.
390BA052 KN

HT 100, HT 101, HT 130, HT 131
English
8
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 enginebefore 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.
Stopping the engine
–before checking chain tension.
–before retensioning the chain.
–before replacing the chain.
–before rectifying problems.
Observe sharpening instructions – keep
the chain and guide bar in good
condition at all times for safe and correct
handling of the saw. The chain must be
properly sharpened, tensioned and well
lubricated.
Always change the chain, guide bar and
sprocket in good time.
Store fuel and chain lubricant in properly
labelled, safety-type canisters only.
When handling gasoline, avoid direct
contact with the skin and avoid inhaling
fuel vapour – health risk.
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.
Preparations
NWear suitable protective clothing,
observe safety precautions.
NAdjust telescoping shaft to the
required length (HT 101, HT 131
only).
NStart the engine.
NPut on the shoulder strap.
Cutting Sequence
To allow branches a free fall, always cut
the lower branches first. Prune heavy
branches (large diameter) in several
controllable pieces.
WARNING
Never stand directly underneath the
branch you are cutting – be wary of
falling branches. Note that a branch may
spring back at you after it hits the ground
– risk of injury.
Disposal
Do not throw cuttings into the garbage
can – they can be composted.
Working Techniques
Hold the control handle with your right
hand, and the shaft with your left hand.
Your left arm should be extended to the
most comfortable position.
Using the Unit

HT 100, HT 101, HT 130, HT 131
English
9
HT 100, HT 130
Always hold the shaft with your left hand
in the area of the handle hose.
The shaft should always be held at an
angle of 60° or less.
The least tiring working position is a tool
angle of 60°.
Any lesser angle may be used to suit the
situation concerned.
Cross-cut
To avoid pinching the bar in the cut,
position the cutting attachment with the
hook against the branch and then
perform the cross-cut from the top
downwards.
Relieving cut
To avoid tearing the bark on thick
branches, always start by performing a
relieving cut (1) on the underside of the
branch.
NTo do this, apply the cutting
attachment and pull it across the
bottom of the branch in an arc as far
as the bar nose.
NPerform the cross-cut (2) – position
the bar with the hook against the
branch and then perform the cross-
cut.
Flush-cutting thick branches
If branch diameter is more than 10 cm,
first
Nperform undercut (3) and then
cross-cut at a distance of about 20
cm (A) from the final cut. Then carry
out the flush-cut (4), starting with a
relieving cut and finishing with a
cross-cut.
390BA018 KN
390BA052 KN
2
1
390BA041 KN
3
4
A
390BA024 KN

HT 100, HT 101, HT 130, HT 131
English
10
Cutting above obstacles
The unit's long reach makes it possible
to prune branches that are overhanging
obstacles, such as rivers or lakes. The
tool angle in this case depends on the
position of the branch.
Cutting from a lift bucket
The unit's long reach enables cutting to
be performed next to the trunk without
the risk of the lift bucket damaging other
branches. The tool angle in this case
depends on the position of the branch.
30° angle drive (special accessory)
The angle drive keeps the cutting
attachment at an angle of 30° to the
drive tube.
The angle drive may be adjusted on the
drive tube to the following positions only:
1For cross-cutting vertical branches
and bushes.
2For a better view of the cutting
attachment.
A cutting attachment consists of the saw
chain, guide bar and chain sprocket.
The cutting attachment that comes
standard is designed to exactly match
the pole pruner.
–The pitch (t) of the saw chain (1),
chain sprocket and the nose
sprocket of the Rollomatic guide bar
must match.
–The drive link gauge (2) of the saw
chain (1) must match the groove
width of the guide bar (3).
If non-matching components are used,
the cutting attachment may be damaged
beyond repair after a short period of
operation.
390BA020 KN
390BA058 KN
1
2
390BA053 KN
Cutting Attachment
001BA248 KN
1
2
3
a

HT 100, HT 101, HT 130, HT 131
English
11
Chain Scabbard
The scope of supply includes a bar
scabbard that matches the cutting
attachment.
If guide bars of different lengths are
mounted to the pole pruner, always use
a chain scabbard of the correct length
which covers the complete guide bar.
The length of the matching guide bars is
marked on the side of the chain
scabbard.
Removing the chain sprocket cover
NUnscrew the nut and remove the
cover.
NTurn the screw (1)
counterclockwise until the tensioner
slide (2) butts against the left end of
the housing slot, then back it off 5
full turns.
Fitting the chain
WARNING
Wear work gloves to protect your hands
from the sharp cutters.
NFit the chain – start at the bar nose.
001BA244 KN
Mounting the Bar and Chain
390BA042 KN
1
2
390BA043 KN
390BA003 KN

HT 100, HT 101, HT 130, HT 131
English
12
NFit the guide bar over the screw (3)
and engage peg of tensioner slide in
the hole (4) – place the chain over
the sprocket (5) at the same time.
NTurn the tensioning screw (1)
clockwise until there is very little
chain sag on the underside of the
bar – and the drive link tangs are
engaged in the bar groove.
NRefit the cover and screw on the nut
fingertight.
NGo to chapter on "Tensioning the
Saw Chain"
Retensioning during cutting work:
NStopping the engine
NLoosen the nut.
NHold the bar nose up.
NUse a screwdriver to turn the
tensioning screw (1) clockwise until
the chain fits snugly against the
underside of the bar.
NWhile still holding the bar nose up,
tighten down the nut firmly.
NGo to "Checking Chain Tension".
A new chain has to be retensioned more
often than one that has been in use for
some time.
NCheck chain tension frequently –
see chapter on "Operating
Instructions".
NShut off the engine
NWear work gloves to protect your
hands.
NThe chain must fit snugly against
the underside of the bar and it must
still be possible to pull the chain
along the bar by hand.
NIf necessary, retension the chain.
A new chain has to be retensioned more
often than one that has been in use for
some time.
NCheck chain tension frequently –
see chapter on "Operating
Instructions".
1
5
390BA044 KN
43
Tensioning the Chain
1
390BA045 KN
Checking Chain Tension
390BA046 KN

HT 100, HT 101, HT 130, HT 131
English
13
A properly adjusted throttle cable is the
precondition for correct operation in the
full throttle, starting throttle and idle
positions.
NAdjust the throttle cable only when
the unit is completely and properly
assembled.
NUse a suitable tool to push the slide
to the end of the slot (see
illustration).
NPress down the throttle trigger
lockout (1) and squeeze the throttle
trigger (2) (full throttle) – this sets
the throttle cable correctly.
The STIHL 4-MIX engine features
mixture lubrication and must be run on a
fuel mixture of gasoline and engine oil.
It operates otherwise on the 4-stroke
principle.
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
Adjusting the Throttle Cable
002BA163 KN
2
1
002BA161 KN
4-MIX Engine Fuel

HT 100, HT 101, HT 130, HT 131
English
14
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.
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 so that dirt
cannot fall into the tank.
NAlways position the machine so that
the filler cap is facing upwards.
A number of different filler caps are
installed as standard at the factory.
Cliplock filler cap (bayonet-type)
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
002BA420 KN
002BA418 KN

HT 100, HT 101, HT 130, HT 131
English
15
Threaded filler cap
Opening the cliplock filler cap
NSwing the clip into an upright
position
NTurn the cap counterclockwise
(approx. 1/4 turn)
NRemove the filler cap
Refueling
Take care not to spill fuel while fueling
and do not overfill the tank. STIHL
recommends use of the STIHL filling
system (special accessory).
Closing the cliplock filler cap
NPosition the cap with the clip in an
upright position; the markings must
line up
NTurn cap clockwise as far as it will
go (approx. 1/4 turn)
NFold the cliplock down so that it is
flush with the surface
If the cliplock is not flush with the surface
and the lug on the clip does not engage
entirely in the recess (arrow), the cap is
not properly closed and the steps
described above must be repeated.
Opening screw-type tank 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 (special accessory).
Closing screw-type tank 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.
002BA419 KN
249BA053 KN
249BA054 KN
249BA055 KN
249BA056 KN
002BA447 KN
002BA448 KN

HT 100, HT 101, HT 130, HT 131
English
16
For automatic and reliable lubrication of
the chain and guide bar – use only an
environmentally compatible quality
chain and bar lubricant. Rapidly
biodegradable STIHL BioPlus is
recommended.
NOTICE
Biological chain oil must be resistant to
aging (e.g. STIHL BioPlus), since it will
otherwise quickly turn to resin. This
results in hard deposits that are difficult
to remove, especially in the area of the
chain drive and chain. It may even cause
the oil pump to seize.
The service life of the chain and guide
bar depends on the quality of the
lubricant. It is therefore essential to use
only a specially formulated chain
lubricant.
WARNING
Do not use waste oil. Renewed contact
with waste oil can cause skin cancer.
Moreover, waste oil is environmentally
harmful.
NOTICE
Waste oil does not have the necessary
lubricating properties and is unsuitable
for chain lubrication.
NOTICE
A full chain oil tank is sufficient for only
half a tankful of fuel. Check the oil level
regularly during cutting work. Never
allow the oil tank to run dry.
Preparations
NThoroughly clean the oil 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
NRaise the grip until it is upright.
NTurn the cap counterclockwise
(about a quarter turn).
Marks on tank cap and oil tank must line
up.
Chain Lubricant Filling Chain Oil Tank
390BA047 KN
002BA575 KN
002BA576 KN
002BA577 KN

HT 100, HT 101, HT 130, HT 131
English
17
NRemove the cap.
Filling the chain oil tank
NFill up with chain oil
Take care not to spill chain oil while
refilling and do not overfill the tank.
STIHL recommends you use the STIHL
filler nozzle for chain oil (special
accessory).
Closing
Grip must be vertical:
NFit the cap – marks on tank cap and
oil tank must line up.
NPress the cap down as far as stop.
NWhile holding the cap depressed,
turn it clockwise until it engages in
position.
The marks on the cap and oil tank are
then in alignment.
NFold the grip down.
Tank cap is locked.
If the oil level in the tank does not go
down, the reason may be a problem in
the oil supply system: Check chain
lubrication, clean the oilways, contact
your dealer for assistance if necessary.
STIHL recommends that you have
servicing and repair work carried out
exclusively by an authorized STIHL
servicing dealer.
If the tank cap cannot be locked in the oil
tank opening
Bottom of cap is twisted in relation to
top.
NRemove the cap from the oil tank
and check it from above.
002BA578 KN
002BA577 KN
002BA579 KN
002BA580 KN
002BA581 KN
002BA583 KN

HT 100, HT 101, HT 130, HT 131
English
18
NPlace the cap on the opening and
rotate it counterclockwise until it
engages the filler neck.
NContinue rotating the cap
counterclockwise (about a quarter
turn) – this causes the bottom of the
cap to be turned to the correct
position.
NTurn the cap clockwise and lock it in
position – see section on "Closing".
The saw chain must always throw off a
small amount of oil.
NOTICE
Never operate your saw without chain
lubrication. If the chain runs dry, the
whole cutting attachment will be
irretrievably damaged within a very short
time. Always check chain lubrication and
the oil level in the tank before starting
work.
Every new chain has to be broken in for
about 2 to 3 minutes.
After breaking in the chain, check chain
tension and adjust if necessary – see
"Checking Chain Tension".
HT 101, HT 131 only
WARNING
Always shut off the engine and fit the
chain guard
NLoosen the screw.
NAdjust shaft to the required length.
NTighten down the screw firmly.
Left: Bottom of cap is twisted –
inner mark (1) in line with
outer mark.
Right: Bottom of cap in correct posi-
tion – inner mark is under the
grip. It is not in line with the
outer mark.
002BA584 KN
1
002BA576 KN
Checking Chain Lubrication
390BA048 KN
Adjusting the Telescoping
Shaft
390BA049 KN