Stihl SP 92 T User manual

STIHL SP 92 T Instruction Manual

Original Instruction ManualPrinted on chlorine-free paper
Printing inks contain vegetable oils, paper can be recycled.
© ANDREAS STIHL AG & Co. KG, 2020 0458-423-0121-C. VA1.A20. 0000008642_003_GB
SP 92 TC
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 trouble-free 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 7
Assembling the Unit 9
Fuel 10
Fueling 11
Fitting the Harness 12
Backpack Carrying System 13
Starting / Stopping the Engine 13
Transporting the Unit 16
Operating Instructions 17
Replacing the Air Filter 17
Adjusting the Carburetor 17
Spark Plug 18
Engine Running Behavior 19
Storing the Machine 19
Inspection and Maintenance by
User 19
Inspections and Maintenance by
Dealer 21
Maintenance and Care 22
Minimize Wear and Avoid Damage 24
Main Parts 25
Specifications 26
Maintenance and Repairs 27
Disposal 27
EC Declaration of Conformity 27

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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.
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.
Guide to Using this Manual
Fuel tank; fuel mixture of
gasoline and engine oil
Operate manual fuel
pump
Safety Precautions and
Working Techniques
Special safety precau-
tions must be observed
when working with this
power tool because the
rakes and tines move at a
high stroke rate.
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 safety
precautions may result in
serious or even fatal
injury.

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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 power tool only for harvesting
fruit about the size of coffee berries,
nuts, olives, sloes, etc.
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.
Operate the power tool only in a fully
assembled condition.
Only mount tools 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.
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.).
Wear sturdy shoes with non-slip soles.
WARNING
Wear a face shield and make sure it is a
good fit. A face shield alone does not
provide adequate eye protection.
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 stop the engine.
Carry the machine suspended from the
shoulder strap or by the drive tube.
Avoid touching hot parts of the machine,
especially the muffler and gear housing
– you could suffer serious burns.
Transporting by vehicle: Properly secure
your power tool to prevent turnover, fuel
spillage and damage.
Clothing must be sturdy
but allow complete free-
dom of movement. Wear
snug-fitting clothing, e.g.
an overall and jacket
combination, do not wear
a work coat.
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).
002BA343 KN

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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 leak is found, do not start the
engine.
Before Starting
Check that your power tool is properly
assembled and in good condition – refer
to appropriate chapters in the instruction
manual:
–Check the fuel system for leaks,
paying special attention to visible
parts such as the tank cap, hose
connections and the manual fuel
pump (on machines so equipped). If
there are any leaks or damage, do
not start the engine – risk of fire.
Have your machine repaired by a
servicing dealer before using it
again.
–The power tool must be properly
assembled – see “Assembling the
Unit”.
–The stop switch / slide control must
move freely.
–Smooth action of choke knob,
throttle trigger lockout, throttle set
wheel and throttle trigger – the
throttle trigger must return
automatically to the idle position.
The choke knob must spring back
from the g position to the run
position F when the throttle trigger
lockout and throttle trigger are
squeezed.
–Tines on rake: Securely mounted
and in good condition (clean, not
bent or cracked).
–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 the safety devices in any way.
–Keep the handles dry and clean,
free from oil and dirt, for safe
control.
–Adjust the harness to suit your
height and reach. See chapter on
"Fitting the Harness".
To reduce the risk of personal injury, do
not operate your machine if it is not in a
safe condition.
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 machine on firm ground in an
open area. Make sure you have good
balance and secure footing. Hold the
machine securely. The rakes and tines
must be clear of the ground and all other
obstructions because they may begin to
run when the engine starts – allow
sufficient clearance for movement of the
rakes and tines.
To reduce the risk of injury, avoid
contact with the rakes and tines.
Your power tool a one-person unit. To
reduce the risk of injury from fall falling
branches or contact with the rakes and
tines, do not allow other persons within a
radius of 5meters of your own position –
even when starting.
Do not drop start the power tool – 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 tank cap as
securely as possible.

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Note that the rakes and tines continue to
run for a short period after you let go of
the throttle trigger (flywheel effect).
Check idle speed setting: The rakes and
tines 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 always have good balance and
secure footing.
Wrap your fingers and thumbs around
the handles. Right hand on control
handle, left hand on handle hose on
drive tube, even if you are left-handed.
The machine can be carried on a
shoulder strap to relieve the weight on
the operator's arms.
During Operation
In the event of impending danger or in
an emergency, switch off the engine
immediately – move the stop switch /
slide control in the direction of 0.
To reduce the risk of injury from falling
objects, do not allow bystanders within a
radius of 5 meters of your own position.
To reduce the risk of damage to
property, also maintain this distance
from other objects (vehicles, windows).
Make sure the idle speed setting is
correct. The rakes and tines must not
move when the engine is idling with the
throttle trigger released.
Check and correct the idle speed setting
regularly. If the rakes and tines still run
when the engine is idling, have your
dealer check your machine and make
proper adjustments or repairs. STIHL
recommends a STIHL servicing dealer.
Take special care in slippery conditions
on slopes and uneven ground.
Clear away fallen branches and scrub.
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
–Never work in a tree
–Never work on an insecure support
–Never operate your machine 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.
002BA344 KN
002BA345 KN
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.

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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.
Before leaving the power tool
unattended: Shut off the engine.
If the rakes and tines become blocked:
Let go of throttle trigger – shut off the
engine – clear the blockage.
Opening the throttle while the rakes and
tines 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 rakes
and tines moving while the engine is
idling.
Keep the rakes and tines clear of foreign
objects – such objects may be caught
and thrown and damage the rakes and
tines.
Check the rakes and their tines at
regular short intervals or immediately if
there is a noticeable change in the tool's
behavior:
–Shut off the engine, hold the
machine securely.
–Check condition and tightness, look
for cracks.
–Replace damaged parts
immediately, even if they have only
superficial cracks.
–To reduce the risk of injury, always
shut off the engine and remove the
spark plug boot before replacing the
tines or rake with tines.
Never continue using or attempt to
repair damaged or cracked rakes or
tines.
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.

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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.
This power tool is used for harvesting
nuts and fruits.
The influences of ripeness, variety and
size of fruits or nuts determines whether
this power tool is suitable for harvesting.
The performance of this special
harvester is affected by the above-
mentioned factors.
This unit is not recommended for
harvesting dessert fruit, e.g. apples,
pears, plums, etc.
WARNING
Do not operate the unit if one of the
tines (1) is missing or broken. Operating
the unit with broken and/or missing
tines (1) may result in the operator being
exposed to high loads caused by
increased vibration – see "Vibrations".
Using the Unit
1
414BA002 KN

SP 92 TC
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NOTICE
The forkhead (2) performs rapid
reciprocating movements during
operation. Take care not to damage
branches with the forkhead. Do not force
branches between the rakes (3).
Working Technique
Use the following working technique to
obtain best results and good
performance from the harvester:
NAccelerate the engine and comb the
branches with the rakes. Use the
throttle trigger to obtain the optimum
rake stroke rate.
NKeep the throttle open only as long
as the rakes are engaged in the
branches.
NDo not accelerate the engine when
the rakes are not engaged in the
branches.
NReposition the rakes in the next
section of the tree.
NRepeat this process for all sections
of the tree.
NPay attention to the tree's limb
structure during operation:
–Comb the lower section (A) from the
top downwards, this also applies for
drooping branches at the outer
extremities of the tree.
–Comb the upper section (B) from
the bottom upwards.
–Comb the tree from the inside
outwards, towards the tips of the
branches.
NWhile combing the branches, turn
the rakes to and fro around the
shaft's axis (C) if necessary.
NHave the whole tree even if there is
very little fruit left on it.
NDo not hold the unit in one spot for
too long so as not to damage leaves
and branches unnecessarily.
NAlways shut off the engine before
leaving the unit unattended.
NOTICE
Operating the unit with broken and/or
missing tines (1) may result in damage
to gearbox components or overload
them. Therefore, do not continue using a
unit with broken and/or missing tines.
Operating the unit with broken and/or
missing tines reduces the unit's
harvesting performance.
NAlways replace damaged tines –
see chapter on "Inspection and
Maintenance by User".
32
414BA003 KN
3
414BA004 KN
414BA005 KN
1

SP 92 TC
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Mounting the Gearbox
NPlace the power tool on the ground
so that it rests on the machine
support (arrow).
NLoosen the clamp screws (1) on the
gearbox – do not remove them.
NPull the protective cap off the end of
the drive tube.
The plug may come out of the drive tube
when you pull off the cap. Push it back
into the drive tube as far as stop.
NApply a mark (with pencil or colored
pen) at distance A (40 mm) from the
end of the drive tube.
NPush the gearbox (2) onto the drive
tube (3) as far as stop – turn it back
and forth at the same time – until it
reaches or covers the mark on the
drive tube.
Alternative check: The drive tube is
correctly positioned when it completely
closes the slot in the gearbox’s clamp
(short arrows).
NLine up the gearbox parallel to the
machine support or the ground.
NTighten down the clamp screws on
the gearbox firmly.
Assembling the Unit
414BA006 KN
1
414BA007 KN
1
413BA014 KN
002BA248 KN
413BA015 KN
A
414BA008 KN
2
3
414BA009 KN

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Fitting the Tines
NScrew the tines (1) into the two
rakes (2) by hand as far as stop – fit
all eight tines on the rakes.
NTighten down the tines by hand.
NEngage the combination wrench (3)
on the hexagon (4) at the base of
tine (1) and screw down as far as
stop.
NUse the combination wrench (3) to
tighten down the tine (1) firmly by
turning it another 30° to 40°.
NRemove the combination wrench
from the tine.
Your engine requires a mixture of
gasoline and engine oil.
WARNING
For health reasons, avoid direct skin
contact with gasoline and avoid inhaling
gasoline vapor.
STIHL MotoMix
STIHL recommends the use of STIHL
MotoMix. This ready-to-use fuel mix
contains no benzol or lead, has a high
octane rating and ensures that you
always use the right mix ratio.
STIHL MotoMix uses STIHL HP Ultra
two-stroke engine oil for an extra long
engine life.
MotoMix is not available in all markets.
Mixing Fuel
NOTICE
Unsuitable fuels or lubricants or mix
ratios other than those specified may
result in serious damage to the engine.
Poor quality gasoline or engine oil may
damage the engine, sealing rings, hoses
and the fuel tank.
Gasoline
Use only high-quality brand-name
gasoline with a minimum octane rating
of 90 – leaded or unleaded.
414BA025 KN
1
2
414BA026 KN
16 mm
2
4
1
3
414BA024 KN
1
3
Fuel

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Gasoline with an ethanol content of
more than 10% can cause running
problems in engines with a manually
adjustable carburetor and should not be
used in such engines.
Engines equipped with M-Tronic deliver
full power when run on gasoline with an
ethanol content of up to 25% (E25).
Engine Oil
If you mix the fuel yourself, use only
STIHL two-stroke engine oil or another
high-performance engine oil in
accordance with JASO FB, JASO FC,
JASO FD, ISO-L-EGB, ISO-L-EGC or
ISO-L-EGD.
STIHL specifies STIHL HP Ultra two-
stroke engine oil or an equivalent high-
performance engine oil in order to
maintain emission limits over the
machine’s service life.
Mix Ratio
STIHL 50:1 two-stroke engine oil: 50
parts gasoline to 1 part oil
Examples
NUse a canister approved for storing
fuel. Pour oil into canister first, then
add gasoline and mix thoroughly.
Storing Fuel
Store fuel only in approved safety-type
fuel canisters in a dry, cool and safe
location protected from light and the sun.
Fuel mix ages – only mix sufficient fuel
for a few weeks work. Do not store fuel
mix for longer than 30 days. Exposure to
light, the sun, low or high temperatures
can quickly make the fuel mix unusable.
STIHL MotoMix may be stored for up to
2 years without any problems.
NThoroughly shake the mixture in the
canister before fueling your
machine.
WARNING
Pressure may build up in the canister –
open it carefully.
NClean the fuel tank and canister
from time to time.
Dispose of remaining fuel and cleaning
fluid properly in accordance with local
regulations and environmental
requirements.
Fuel filler cap
WARNING
When fueling on a slope, always position
the machine with the filler cap facing
uphill.
NPlace the machine on level ground
so that the filler cap is facing up.
NBefore fueling, clean the filler cap
and the area around it to ensure that
no dirt falls into the tank.
Gasoline STIHL engine oil 50:1
Liters Liters (ml)
10.02(20)
5 0.10 (100)
10 0.20 (200)
15 0.30 (300)
20 0.40 (400)
25 0.50 (500)
Fueling
0208BA019 KN

SP 92 TC
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12
Open the 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 for fuel (special accessory).
NFill up with fuel.
Close the 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.
The type of harness is market-specific.
Shoulder strap
NPut on the shoulder strap (1).
NAdjust the length of the strap so that
the carabiner (2) is about a hand’s
width below your right hip.
Attaching unit to harness
NAttach the carabiner (1) to the
carrying ring (2) on the drive tube.
Detaching unit from harness
NPress down the bar on the
carabiner (1) and pull the carrying
ring (2) out of the carabiner.
0208BA020 KN
0208BA021 KN
Fitting the Harness
1
2
002BA319 KN
1
002BA320 KN
2
1
2
1
002BA320 KN
2
1
2

SP 92 TC
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13
The backpack carrying system
distributes the load evenly over the
shoulders, back and hips.
NPut the backpack carrying system
(1) on your back and adjust it as
described in the instruction sheet
provided.
NWith the engine running, attach the
power tool to the backpack carrying
system, i.e. hook the carabiner (2)
to the ring (3) on the drive tube.
NAdjust the hip belt (4), the two
harness straps (5) and the support
strap (6).
Controls
1Throttle trigger lockout
2Throttle trigger
3Stop switch with Run and Stop
positions. Depress the stop switch
(…) to switch off the ignition – see
"Function of Stop Switch and
Ignition System".
4Throttle set wheel – limits travel of
throttle trigger – see "Function of
Throttle Set Wheel".
Function of Stop Switch and Ignition
System
The stop switch is normally in the Run
position, i.e. when it is not depressed:
The ignition is switched on – the engine
is ready to start. Operate the stop switch
Backpack Carrying System
2
3
1
2
414BA029 KN
414BA031 KN
5
6
4
Starting / Stopping the
Engine
0208BA028 KN
2
1
43

SP 92 TC
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14
to switch off the ignition. The ignition is
switched on again automatically after
the engine stops.
Function of Throttle Set Wheel
Travel of throttle trigger can be limited
with the set wheel:
–Turn throttle set wheel in direction of
– as far as stop to limit travel to idle
speed.
–Turn throttle set wheel in direction of
+ as far as stop to allow travel to full
throttle.
–The preset limit can be temporarily
overridden by squeezing the throttle
trigger firmly.
Starting the Engine
NPress the manual fuel pump
bulb (5) at least five times – even if
the bulb is already filled with fuel.
Cold engine (cold start)
NTurn choke knob (6) and then push
it in at g
Also use this setting if the engine has
been running but is still cold.
–Turn throttle set wheel in direction of
+ as far as stop.
Hot engine (hot start)
NChoke knob (6) remains in F
position.
Cranking
NPlace the powerhead on the
ground: It must rest securely on the
engine support. Rest the gearbox
on a raised support (high mound) or
position the drive tube in the fork of
a branch. Check that the rakes are
not touching the ground or any other
obstacles.
Alternative method of starting:
NHold the unit securely with your left
hand on the fan housing – your
thumb should be under the fan
housing – rest the drive tube in the
fork of a branch – check that the
rakes and tines are not touching the
ground or any other obstacles.
NMake sure you have a firm footing.
NWhen starting from the kneeling
position, hold 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.
5
0000-GXX-5224-A0
2.
1.
6
0000-GXX-5475-A0
414BA013 KN
414BA014 KN
414BA015 KN

SP 92 TC
English
15
NHold the starter grip in your right
hand and pull it out slowly and
steadily.
NOTICE
Do not pull out the starter rope all the
way – 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.
NContinue cranking until the engine
runs.
As soon as the engine runs
At temperatures below +10°C
Warm up the engine for at least
10 seconds in position g.
At temperatures above +10°C
Warm up the engine for at least
5 seconds in position g.
NDepress throttle trigger lockout and
pull the throttle trigger – the choke
knob moves to the run position F.
Warm up a cold engineat varying
speeds.
WARNING
Make sure the carburetor is correctly
adjusted. The working tool must not
move when the engine is idling.
Your machine is now ready for
operation.
Stopping the Engine
NDepress the momentary contact
stop switch – the engine stops –
release the stop switch – it springs
back to the run position.
Other Hints on Starting
Engine stalls in cold start position g.
NDepress throttle trigger lockout and
pull the throttle trigger – the choke
knob moves to the run position F.
NContinue cranking in position F until
the engine runs.
Running engine stalls in cold start
position g or under acceleration.
NContinue cranking in cold start
position g until the engine runs.
If the engine does not start
NCheck that all settings are correct.
NCheck that there is fuel in the tank
and refuel if necessary.
NCheck that the spark plug boot is
properly connected.
NRepeat the starting procedure.
Fuel tank run until completely dry
NAfter refueling, depress the manual
fuel pump bulb at least 5 times –
even if the bulb is already filled with
fuel.
NSet the choke knob according to
engine temperature.
NNow start the engine.
414BA016 KN
08BA033 KN

SP 92 TC
English
16
STIHL power tool models with the letter
T in their designations have a split drive
shaft for compact transportation.
Disconnecting the Drive Tube
NUnhook the shoulder strap from the
carrying ring.
NPlace the machine on the ground so
that it rests on the machine support
and gearbox or the tines,
NLoosen the wing screw (1) – do not
remove it.
NPull the front drive tube (2) out of the
coupling sleeve (3).
NFit the cap (4) on the end of the front
drive tube.
NOTICE
Make sure the ends of the drive tube are
clean.
Connecting the Drive Tube
NPull the cap off the front drive tube
and keep it in a safe place.
NPut the powerhead on the ground so
that it rests on the machine support.
NExamine ends of drive tube for dirt
and clean them if necessary.
NPush the lug (5) on the front drive
tube (2) into the slot (6) in the
coupling sleeve as far as stop.
When correctly installed, the red line (7)
(arrow point) must be flush with the end
of the coupling sleeve.
NTighten down the wing screw (1)
firmly.
NAttach shoulder strap to the carrying
ring.
Transporting the Unit
4904BA000 KN
1
470BA008 KN
3
2
4
470BA009 KN
5
470BA010 KN
6
2
7
470BA011 KN
1

SP 92 TC
English
17
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".
Do not remove the filter cover or replace
the air filter as long as there is no
noticeable loss of power.
If there is a noticeable loss of engine
power
NTurn the choke knob to g.
NTake out the screws (1).
NRemove the filter cover (2).
NClean away loose dirt from around
the filter.
NRemove the filter element (3).
NReplace dirty or damaged filters.
NReplace any damaged parts.
NFit the new air filter in the filter
housing (4).
NFit the filter cover.
NFit the screws and tighten them
down firmly.
The carburetor has been set at the
factory to provide an optimum fuel-air
mixture under most operating
conditions.
Adjusting Idle Speed
Engine stops while idling
NTurn the idle speed screw (LA)
slowly clockwise until the engine
runs smoothly.
Attachment runs when engine is idling
NTurn the idle speed screw (LA)
slowly counterclockwise until the
attachment stops running.
Operating Instructions Replacing the Air Filter
1
1
2
34
6162BA007 AM
Adjusting the Carburetor
0208BA036 KN

SP 92 TC
English
18
NIf the engine is down on power,
difficult to start or runs poorly at idle
speed, first check the spark plug.
NFit a new spark plug after about 100
operating hours – or sooner if the
electrodes are badly eroded. Install
only suppressed spark plugs of the
type approved by STIHL – see
"Specifications".
Removing the spark plug
NTurn screw (1) in cap (2) until cap
can be removed
NLay down cap
NPull off the spark plug boot (3)
NUnscrew spark plug,
Checking the Spark Plug
NClean dirty spark plug.
NCheck electrode gap (A) and
readjust if necessary – see
"Specifications".
NRectify the problems which have
caused fouling of the spark plug.
Possible causes are:
–Too much oil in fuel mix.
–Dirty air filter.
–Unfavorable running conditions.
WARNING
Arcing may occur if the adapter nut (1) is
loose or missing. Working in an easily
combustible or explosive atmosphere
may cause a fire or an explosion. This
can result result in serious injuries or
damage to property.
NUse resistor type spark plugs with a
properly tightened adapter nut.
Installing the Spark Plug
NFit the spark plug and tighten it
down firmly.
NPress the boot firmly onto the spark
plug.
NFit the cap (1), insert the screw (2)
and tighten it down firmly.
Spark Plug
1
0208BA037 KN
2
3
0208BA038 KN
000BA039 KN
A
1
000BA045 KN
1
2
0208BA039 KN