Efco DS 2400D-PU Assembly instructions

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OPERATOR’S INSTRUCTION MANUAL
MANUEL D’UTILISATION ET D’ENTRETIEN
MANUAL DE INSTRUCCIONES
DS 2400D-PU (1.32 cu.in)

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To correctly use the power unit and prevent
accidents, do not start work without having
rst carefully read this manual. You will nd
explanations concerning the operation of the
various parts plus instructions for necessary
checks and relative maintenance.
Note: Illustrations and specications
in this manual may vary according to
Country requirements and are subject to
change without notice by the
manufacturer.
THE OPERATOR’S MANUAL
Your operator’s manual is for your protection.
READ IT. Keep it in a safe place for reference.
Know what you are doing before you begin
assembly of the unit. Proper preparation and
upkeep go hand-in-hand with satisfactory
performance of the power unit and safety.
Contact your dealer or the distributor for your
area if you do not understand any of the
instructions in this manual.
In addition to the operating instructions, this
manual contain paragraphs that require your
special attention.
Such paragraphs are marked with the
symbols described below:
Warning: where there is a risk of an accident
or personal injury or serious damage to
property.
Caution: where there is a risk of damaging
the machine or its individual components.
WARNING - To ensure safe and
correct operation of the power
unit, this operator’s manual
should always be kept with or
near the machine. Do not lend or
rent your power unit without the
operator’s instruction manual.
WARNING: Allow only persons
who understand this manual to
operate your power unit.
INTRODUCTION

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TABLE OF CONTENTS
PRODUCT IDENTIFICATION
Power unit Components ............................................. 5
SAFETY
Understanding Safety Symbols ....................................... 5
State and Local Requirements ........................................ 6
SAFETY RULES
Basic Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Fuel Handling ..................................................... 8
Operation and Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Safety Features ................................................... 9
Safety equipment checking .......................................... 9
Precautions to Reduce Vibration Risk .................................. 10
Maintenance Precautions............................................ 10
ASSEMBLY
Fitting the handle .................................................. 11
Mounting and demounting attachments ................................. 11
OPERATION
Fueling .......................................................... 12
Preparation for working ............................................. 13
Starting the Engine................................................. 13
Breaking-in the Engine .............................................. 14
Stopping the Engine ................................................ 15
MAINTENANCE
Maintenance Chart ................................................. 16
Carburetor Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Fuel Filter ........................................................ 17
Air Filter ......................................................... 17
Starter Unit ....................................................... 18
Engine .......................................................... 18
Spark Plug ....................................................... 18
Mufer........................................................... 18
Spark Arresting Mufer.............................................. 18
Attachments coupling ............................................... 19
TROUBLESHOOTING
Using Troubleshooting Chart ......................................... 20
STORAGE
Storing power unit.................................................. 21
TECHNICAL DATA
DS 2400D-PU..................................................... 21

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PRODUCT IDENTIFICATION
Power unit Components (Fig. 1)
1 - Allen key
2 - Combination Wrench
3 - Locking Pin
4 - Simple Harness
5 - Fuel Tank Cap
6 - Purge Bulb
7 - Carburetor Adjustment Screw
8 - Mufer Cover
9 - Spark Plug
10 - Air Filter Cover
11 - Starter Handle
12 - Choke Lever
13 - Throttle Trigger Lockout
14 - Switch
15 - Throttle Trigger
16 - Harness Attachment Point
17 - Loop handle
18 - Attachments coupling
SAFETY
- This symbol indicates Warning, and Caution.
- WARNING – The surface can be hot.
Understanding Safety Symbols

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SAFETY
State and Local Requirements
The engine is NOT equipped with a
Spark Arrester System complying with
the requirements of SAE Recommended
Practice J335 and California Codes 4442
and 4443. All national forest land and
land managed by the states of California,
Maine, Washington, Idaho, Minnesota,
New Jersey and Oregon require internal
combustion engines to be equipped with
a spark arrester screen by law. Other
states and federal agencies are enacting
similar regulations.
Operating this engine in a state or locale
where such regulations apply, could result in
a violation of the law.
Note: When using a power unit for logging
purposes, refer to Code of Federal
Regulations, Parts 1910 and 1928.
WARNING: The ignition system
of your unit produces an
electromagnetic eld of a very low
intensity. This eld may interfere
with some pacemakers. To reduce
the risk of serious or fatal injury,
persons with pacemaker should
consult their physician and the
pacemaker manufacturer before
operating this tool.
WARNING: Mufer surfaces
are very hot during and after
operation of the power unit, keep
all body parts away from the
mufer. Serious burns may occur
if contact is made with the mufer.
WARNING: Exposure to vibrations
through prolonged use of gasoline
powered hand tools could cause
blood vessel or nerve damage
in the ngers, hands, and wrists
of people prone to circulation
disorders or abnormal swellings.
Prolonged use in cold weather
has been linked to blood vessel
damage in otherwise healthy
people. If symptoms occur such as
numbness, pain, loss of strength,
change in skin colour or texture,
or loss of feeling in the ngers,
hands, or wrists, discontinue the
use of this tool and seek medical
attention.
WARNING: The engine exhaust
from this product contains
chemicals known to the State of
California to cause cancer, birth
defects or other reproductive
harm.
Operate your power unit outdoors
only in a well ventilated area.
WARNING: Under no
circumstances may the design of
the machine be modied. Always
use genuine accessories. Non-
authorized modications and/or
accessories can result in serious
personal injury or the death of
the operator or others. Your
warranty may not cover damage
or liability caused by the use of
non-authorized accessories or
replacement parts.

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SAFETY RULES
Basic Safety Precautions
• Read this manual carefully until you
completely understand and can follow all
safety rules, precautions, and operating
instructions before attempting to use the
unit.
• Restrict the use of your power unit to adult
users who understand and can follow
safety rules, precautions, and operating
instructions found in this manual. Minors
should never be allowed to use a power
unit.
• Do not handle or operate a power unit
when you are fatigued, ill, or upset, or if you
have taken alcohol, drugs, or medication.
You must be in good physical condition
and mentally alert. Power unit work is
strenuous. If you have any condition that
might be aggravated by strenuous work,
check with your doctor before operating a
power unit. Be more cautious before rest
periods and towards the end of your shift.
• Keep children, bystanders, and animals a
minimum of 50 feet (15 meters) away from
the work area. Do not allow other people
or animals to be near the power unit when
starting or operating the power unit.
• While working with the power unit, always
use safety protective approved clothing.
The use of protective clothing does not
eliminate injury risks, but reduces the injury
effects in case of accident. Consult your
trusted supplier to choose equipment in
compliance with legislation. The clothing
must be proper and not an obstacle. Wear
adherent protective clothing. Protective
jackets and dungarees leggings are
ideal. Do not wear clothes, scarves, ties
or bracelets that may get stuck into twigs.
Tie up and protect long hair (example with
foulards, cap, helmets, etc.). Safety boots
having skid-proof sole and anti-piercing
insert. Wear protective goggles or
face screens. Use protections against
noises: for example, noise reduction
ear guards or earplugs. The use of
protections for the ear requires much
more attention and caution, because the
perception of audible warning signals
(screaming, alarms, etc.) is limited. Always
remove your hearing protection as soon as
the engine stops. Wear gloves that permit
the maximum absorption of vibrations.
• Only allow others to use this power unit
who have read this Operator’s Manual or
received adeguate instructions for the safe
and proper use of this power unit.
• Check the power unit each day to ensure
that each device, whether for safety or
otherwise, is functional.
• Never use a damaged, modied, or
improperly repaired or assembled power
unit. Do not remove, damage or deactivate
any of the safety devices. Always replace
cutting tools or safety devices immediately
if it becomes damaged, broken or is
otherwise removed.
• Carefully plan your operation in advance.
Do not start cutting until you have a clear
work area, secure footing, and a planned
retreat path.
• All power unit service, other than the
operations shown in the present manual,
have to be performed by competent
personnel.
• It is unadvisable to hitch tools or applications
to the P.t.o. that are not specied by the
manufacturer.

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Fuel Handling
WARNING: Gasoline is an
extremely ammable fuel. Use
extreme caution when handling
gasoline or fuel mix. Do not
smoke or bring any re or ame
near the fuel or the power unit.
WARNING: Fuel and fuel fumes
can cause serious injury when
inhaled or allowed to come in
contact with the skin. For this
reason observe caution when
handling fuel and make sure there
is adequate ventilation.
WARNING: Beware of carbon
monoxide poisoning.
WARNING! – Mufers tted with
catalytic converters get very hot
during use and remain so for
some time after stopping. This
also applies at idle speed. Contact
can result in burns to the skin.
Remember the risk of re!
• To reduce the risk of re and burn
injury, handle fuel with care. It is highly
ammable.
• Mix, store and transport fuel in a container
approved for gasoline.
• Mix fuel outdoors where there are no
sparks or ames.
• Select bare ground, stop engine, and allow
to cool before refuelling.
• Loosen fuel cap slowly to release pressure
and to keep fuel from escaping around the
cap.
SAFETY RULES
• Tighten fuel cap securely after refuelling.
Unit vibration can cause an improperly
tightened fuel cap to loosen or come off
and spill quantities of fuel.
• Wipe spilled fuel from the unit and allow
remaining fuel to evaporate. Move 10
feet (3 m) away from refuelling site before
starting engine.
• Never attempt to burn off spilled fuel under
any circumstances.
• Do not smoke while handling fuel or while
operating the power unit.
• Store fuel in a cool, dry, well ventilated
place.
• Never place the power unit in a combustible
area such as dry leaves, straw, paper, etc.
• Store the unit and fuel in an area where
fuel vapors cannot reach sparks or open
ames from water heaters, electric motors
or switches, furnaces, etc.
• Never take the cap off the tank when the
engine is running.
• Never use fuel for cleaning operations.
• Take care not to get fuel on your clothing.
If you have spilt fuel on yourself or your
clothes, change your clothes. Wash any
part of your body that has come in contact
with fuel. Use soap and water.
• Don’t expose fuel tank to direct sunlight.
• Keep fuel out of reach of children.
Operation and Safety
WARNING: Always hold the power
unit with both hands when the
engine is running. Use a rm
grip with thumbs and ngers
encircling the power unit handles
(Fig. 2).
• Keep all parts of your body away from the
cutting attachment when the engine is
running.
• Always carry the power unit with the engine
stopped and the mufer away from your
body. Properly secure your power unit to

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SAFETY RULES
prevent turnover, fuel spillage and damage.
• Do not operate a power unit with one
hand! Serious injury to the operator,
helpers, bystanders, or any combination of
these persons may result from one-handed
operation. A power unit is intended for
two-handed use.
• Before you start the engine, make sure the
cutting attachment is not contacting any
object.
• Shut off the engine before setting down
the power unit. Do not leave the engine
running unattended.
• Only use the power unit in well-ventilated
places, do not operate the power unit in
explosive or ammable atmospheres or
in closed environments. Beware of carbon
monoxide poisoning.
• Keep the handles dry, clean, and free of oil
or fuel mixture.
Safety Features
WARNING: As a power unit user,
do not solely rely on the product’s
safety features. You must follow all
safety precautions, instructions,
and maintenance in this manual
to help avoid serious injury.
WARNING: Even with proper
maintenance, the correct
operation of the safety features
under eld conditions can not be
certied.
• Position of handlebars, designed with
correct distance with each other. The
spread and position of the hands provided
by this design work together to give balance
and resistance in controlling the machine.
WARNING: The use of cutting
devices not authorized by the
manufacturer can generate
safety risks.
WARNING: The “DS 2400 D-PU”
described in this manual must
be coupled exclusively to
accessories: “brushcutter “D-
BC”, pruner “D-PP”, blower “D-
BV”, hedgetrimmer “D-HC” or the
extension”. In any case, read this
manual and the manuals supplied
with each accessory carefully
before using the complete
machines.
Safety equipment checking
WARNING: Never use a machine
with faulty safety equipment. The
machine’s safety equipment must
be checked and maintained as
described in this section. If your
machine fails any of these checks
contact your service agent to get
it repaired.
Throttle lock
The throttle lock is designed to prevent
accidental operation of the throttle control.
This arrangement means that the throttle
control is automatically locked at the idle
setting.
Make sure the throttle control is locked at the
idle setting when the throttle lock is released.
Press the throttle lock and make sure it
returns to its original position when you
release it.
Check that the throttle control and throttle
lock move freely and that the return springs
work properly.
Stop switch
Use the stop switch to switch off the engine.

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SAFETY RULES
Start the engine and make sure the engine
stops when you move the stop switch to the
stop setting.
Precautions to Reduce Vibration Risk
• The power unit is provided with anti-
vibration (AV) system; never alter or modify
it.
• Wear gloves and keep your hands warm.
• Maintain a rm grip at all times, but do
not squeeze the handles with constant,
excessive pressures, take frequent breaks.
All the above mentioned precautions do
not guarantee that you will not sustain
whitenger disease or carpal tunnel
syndrome. Therefore, continual and regular
users should monitor closely the condition
of their hands and ngers. If any of the
above symptoms appear, seek medical
advice immediately.
Maintenance Precaution
WARNING: Never operate a power
unit that is damaged, improperly
adjusted, or is not completely
and securely assembled.
• Be sure that the cutting attachment stops
moving when the throttle control trigger
is released. If the cutting attachment
moves at idle speed, the carburetor may
need adjusting, see Operation-Carburetor
Adjusting Section. If the cutting attachment
still moves at idle speed after adjustment
has been made, contact a Servicing Dealer
for adjustment and discontinue use until
the repair is made.
WARNING: All power unit service,
other than items in the Operator’s
Manual maintenance instructions,
must be performed by competent
power unit service personnel.
(If improper tools are used to
remove the ywheel or clutch, or
if an improper tool is used to hold
the ywheel in order to remove
the clutch, structural damage to
the ywheel could occur which
could cause the ywheel to burst
and serious injury could result.)
• Never modify your power unit in any way.
• Keep the handles dry, clean, and free of oil
or fuel mixture.
WARNING: Use only recommended
accessories and replacement parts.
• Never attempt to service the power unit
while the engine is running.
• Never use fuel for cleaning operations.
• Keep the power unit in a dry place, off the
ground and the tanks empty.
• If your power unit is no longer usable,
dispose of it properly without damaging
the environment by handing it in to your
local Dealer who will arrange for its correct
disposal.
• Replace immediately any safety device
when damaged or broken.
WARNING: The mufer and other
parts of the engine (e.g. ns of
the cylinder, spark plug) become
hot during operation and remain
hot for a while after stopping the
engine.
To reduce risk of burns do not
touch the mufer and other parts
while they are hot.

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WARNING: The mufer and other
parts of the engine (e.g. ns of
the cylinder, spark plug) become
hot during operation and remain
hot for a while after stopping the
engine. To reduce risk of burns do
not touch the mufer and other
parts while they are hot.
FITTING THE HANDLE (Figs. 3)
Fit the handle onto the shaft arm and secure
it using screws (A). The handle position is
calculated depending on the requirements of
the operator.
MOUNTING AND DEMOUNTING
ATTACHMENTS (FIG.4)
Mounting:
- Loosen coupling (E) by turning knob (C)
counter-clockwise;
- Align attachment tab (B) with channel (A) in
coupling (E);
- Fit attachment tube (D) into coupling (E) as
far as broken line (F);
NOTE To facilitate the procedure rotate the
attachment cutting tool to engage the drive
shaft with the tting. Check to ensure there
is no dirt or debris in the coupling;
- Tighten knob (C) fully by turning it clockwise.
Demounting:
Release the coupling by turning knob (C)
counter-clockwise and remove the attachment.
Approved power tool attachments
The following Emak attachments may be
mounted to the basic power tool:
Brush cutter attachment: D-BC
Pruner attachment: D-PP
Hedge trimmer attachment: D-HC
Blower attachment: D-BV
Extension attachment
ASSEMBLY

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Fueling
Do Not Smoke!
This product is powered by a 2-cycle engine
and requires pre-mixing gasoline and 2-cycle
oil. Pre-mix unleaded gasoline and 2-cycle
engine oil in a clean container approved for
gasoline.
RECOMMENDED FUEL:THIS ENGINE IS
CERTIFIED TO OPERATE ON UNLEADED
GASOLINE INTENDED FOR AUTOMOTIVE
USE WITH AN OCTANE RATING OF 89 ([R +
M] / 2) OR HIGHER.
Mix 2-Cycle Engine Oil with gasoline
according to the instructions on the package.
We strongly recommend the use of 2%
(50:1) Efco Two Cycle Engine Oil, which is
specically formulated for all Efco air-cooled
two-stroke engines.
The correct oil / fuel proportions shown in the
table below are suitable when using the Efco
Two Cycle Engine Oil or an equivalent high-
quality engine oil (JASO specication FD or
ISO specication L-EGD).
When oil specications are NOT equivalent or
unknown use 4% (25:1) fuel / oil mixing ratio.
CAUTION: DO NOT USE
AUTOMOTIVE OIL OR
2-CYCLE OUTBOARD OIL.
CAUTION:
- Match your fuel purchases to
your consumption; don’t buy
more than you will use in one
or two months;
- Store gasoline in a tightly-
closed validate container in a
cool, dry place.
CAUTION - For the mixture,
never use a fuel with an ethanol
percentage higher than 10%;
gasohol (mixture of gasoline and
ethanol) up to 10% ethanol or E10
fuel are acceptable.
When using an oxygenated gasoline a good
practice of fuel management is necessary.
Gasoline oxygenated with alcohol readily
takes up water when it is present; the water
may be condensed out of humid air or be a
contaminant in the fuel system, including tank.
The use of oxygenated gasoline may cause
the occurrence of vapor-lock easier.
NOTE - Prepare only the quantity of mixture
required for immediate use; do not leave
fuel in the tank or a container for a long
time. Were commend the use of the additive
Emak ADDITIX 2000 code 001000972 if the
mixture is to be stored for 30 days.
Alkylate gasoline
CAUTIONS – Alkylate fuels have
different density than normal fuel.
Therefore engines, set with normal
fuel, need different H jet regulation
to avoid critical issues. For this
operation it’s necessary turned at
a Licensed Service Dealer.
OPERATION

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Fuel Mixture
2-Cycle Engine Oil (25:1) 4%
Gasoline .............. Oil
1 Gallon (US) .......... 5.2 oz.
1 Liter ................ 40 cc (40 ml)
2-Cycle Engine Oil (50:1) 2%
Gasoline .............. Oil
1 Gallon (US) .......... 2.6 oz.
1 Liter ................ 20 cc (20 ml)
Filling the Tank
WARNING: Follow safety
instruction for fuel handling.
Always shut off engine before
fuelling. Never add fuel to a
machine with a running or hot
engine. Move at least 10 feet (3 m)
from refuelling site before starting
engine. DO NOT SMOKE!
1. Clean surface around fuel cap to prevent
contamination.
2. Loosen fuel cap slowly.
3. Carefully pour fuel mixture into the tank.
Avoid spillage.
4. Prior to replacing the fuel cap, clean and
inspect the gasket.
5. Immediately replace fuel cap and hand
tighten. Wipe up any fuel spillage.
WARNING: Check for fuel leaks,
if any are found, correct before
use. Contact a Servicing Dealer if
necessary.
Preparation for Working
Basic Cutting Procedure
1. Wear non-slip gloves for maximum grip
and protection.
WARNING: Hold the power unit
rmly with both hands (Fig. 2).
Always keep your body to the
left of tube. Never use a cross-
handed grip. Left-handers should
follow these instructions too.
Keep a proper cutting stance.
2. Maintain a proper grip (Fig. 2) on the power
unit whenever the engine is running. The
ngers should encircle the handlebar and
the thumb is wrapped under the handlebar.
Fitting the harness
Correct adjustment of the harness permits
the power unit to be properly balanced and
at an appropriate height from the ground
(Fig. 5).
- Put on the single harness.
- Hook the power unit to the harness using
the hook (A, Fig. 5).
- Position the hook (16, Fig. 1) to obtain the
best power unit balance.
- Position the buckle (C, Fig. 6) to obtain
the correct power unit height.
Starting The Engine
WARNING: When the engine is
started with the choke in either the
choke or start throttle positions
the cutting attachment will start
to rotate immediately.
• Place the power unit on level ground and
ensure that no objects or obstructions are
OPERATION

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14
in immediate vicinity which could come in
contact with the cutting attachment. Hold
the body of the machine on the ground
using your left hand (CAUTION! Not with
your foot!), see Fig. 7.
Start-up procedure
1) Slowly push the purge bulb 6 times (6,
Fig.1).
2) Pull the choke lever (12, Fig.1) in the
CLOSE position (A, Fig.8). In so doing,
it also activates automatically half-throttle.
3) Place the power unit on the ground in a
stable position. Check that the cutting
attachment is free. Holding the power unit
down (Fig.7), pull the starter rope until the
rst kick over of the engine is heard (no
more than 3 pulls). A new unit may require
additional pulls.
4) Push the choke lever (12, Fig.1) in OPEN
(I) position (B, Fig.8).
5) Pull the starter cord to start the engine.
Once the machine is started, warm up the
machine for about few seconds, without
touch the throttle lever. The machine could
need more seconds to warm up with cold
weather or at high altitudes. Finally, put the
choke lever (15, Fig.1) for deactivate the
automatic half-throttle.
CAUTION:
- Never wrap the starter cord
around your hand.
- When pulling the starter rope,
do not use the full extent of the
rope as this can cause the rope
to break.
- Do not let starter rope snap
back. Hold the starter handle
(11, Fig.1) and let the rope
rewind slowly.
WARNING: Do not cut material
with the choke lever at the
CLOSE position. Do not operate
your power unit with the starting
throttle lock engaged. Cutting with
the starting throttle lock engaged
does not permit the operator
proper control of the power unit.
NOTE - STARTING WARM ENGINE:
Follow above starting instructions, but do
not use the CLOSE position for start up
again.
WARNING: Weather conditions
and altitude may affect
carburetion. Do not allow
bystanders close to the power unit
while adjusting the carburetor.
Keep the engine at full throttle the entire time
you are cutting.
NOTE: It is normal for smoke to be emitted
from a new engine during and after rst
use.
Breaking-in the Engine
The engine reaches the maximum power
after 5-8 hours of activity.
During this period of breaking-in do not make
the machine function idly at full throttle, to
avoid excessive functioning stress.
CAUTION! – During the breaking-
in period do not vary the
carburetion to obtain a presumed
power increment; the engine can
be damaged.
OPERATION

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Difcult Starting (or starting a ooded
engine)
The engine may be ooded with too much
fuel if it has not started after 10 pulls. Flooded
engines can be cleared of excess fuel by
following the warm engine starting procedure
listed above. Ensure the ON/STOP switch
is in the ON position. Starting could require
pulling the starter rope handle many times
depending on how badly the unit is ooded. If
engine fails to start refer to the
TROUBLESHOOTING TABLE (page 20).
Engine is Flooded
• Set the on/off switch to STOP.
• Engage a suitable tool in the spark plug
boot.
• Pry off the spark plug boot.
• Unscrew and dry off the spark plug.
• Open the throttle wide.
• Pull the starter rope several times to clear
the combustion chamber.
• Ret the spark plug and connect the
spark plug boot, press it down rmly –
reassemble the other parts.
• Set the on/off switch to I, the starting
position.
• Set the choke lever to OPEN position –
even if engine is cold.
• Now start the engine.
Stopping The Engine
Release the throttle trigger (15, Fig. 1) and
let the engine return to idle.
To stop the engine, push the switch (14). Do
not put the power unit on the ground when
the cutting attachment is still moving.
In the event that of the switch will not
function, pull the choke lever in the CLOSE
position (A, Fig. 8) to stop the engine.
Pre-operation checking
WARNING: THE CUTTING
ATTACHMENT SHOULD NEVER
TURN AT IDLE. Turn the idle speed
screw “T” counter-clockwise to
reduce the idle RPM, or contact
a Servicing Dealer for adjustment
and discontinue use until the
repair is made.
Serious personal injury may
result from the cutting attachment
turning at idle.
A damaged clutch may cause a cutting
attachment to rotate at idle speed and
increase the risk of personal injury from loss
of control and from contact with the cutting
tool.
OPERATION

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MAINTENANCE
Maintenance Chart
Please note that the following maintenance intervals apply for normal
operating conditions only. If your daily work requires longer than normal
or harsh cutting conditions are present the suggested intervals should
be shortened accordingly.
Before Each
Use
After Each
Refueling Stop
After Finishing
Daily Work
Weekly
Monthly
If Damaged or
Faulty
As Reguired
Complete Machine Inspect (Leaks, Cracks, and Wear)
Clean
X X
X
Controls (Ignition Switch, Choke
Lever, Throttle Trigger, Trigger
Interlock)
Check Operation X X
Fuel Tank and Fuel Line Inspect (Leaks, Cracks, and Wear)
Clean
X X
X
Inspect
Clean, Replace FIlter Element
Fuel Filter X
XEvery 6
Months
Inspect (Damage and Wear)
Replace
Clutch Drum X
X
Inspect (Damage and Wear)
Clean or Replace
Spark Arrestor Screen
(in Mufer)
X
X X
Inspect
Retighten
All Accessible Screws and Nuts
(Not Adjusting Screws)
X
X
Clean
Replace
Air Filter XEvery 6
Months
XX
Cylinder Fins Clean X
Starter System Vents Clean X
Inspect (Damage and Wear)
Replace
Starter Rope X
X
Carburetor Check idle (Cutting Attachments
must not rotate at idle) X X
Check Eletrode Gap
Replace
Spark Plug XEvery 6
Months
X
Inspect (Damage, and Wear)
Replace by Dealer
Vibration Mounts X
X X

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MAINTENANCE
engine gives maximum power during the
cutting phase.
Fuel Filter
Check the fuel lter (Fig. 10) periodically.
Replace it if contaminated or damaged.
Air Filter
WARNING: Do not clean lter
in gasoline or other ammable
solvent to avoid creating a re
hazard or producing harmful
evaporative emissions.
If a power drop is noticed, check the air lter.
Open the air lter cover (A) and check the air
lter (C, Fig. 11) each day, change the lter if
heavily clogged or damaged.
Clean with Emak degreaser p/n 001101009A,
rinse with water and blast dry with compressed
air, not too close, blowing from the inside
outwards.
Reinstall the air lter into cover. Place the air
lter cover onto the power unit. Tighten the air
lter cover screw (B) securely.
A used air lter can never be completely
cleaned. It is advisable to replace your air lter
with a new one after six month of operation.
Make sure the cover and the support are
clean before tting the new lter.
CAUTION: Never run the engine
without the air lter, serious
damage could result.
Make sure the air lter is correctly
placed in the air lter cover before
reassembly.
Always replace damaged lters.
Do not clean a lter with a brush.
Carburetor Adjustment
Before adjusting the carburetor, clean
the cover vents and air lter as shown in
Illustration Fig. 11, refer to Operation-Starting
Unit and Maintenance-Air Filter Sections for
details. Allow the engine to warm up prior to
carburetor adjustment.
This engine is designed and manufactured
in order to comply with EPA (Environmental
Protection Agency) Phase 3 regulations.
The carburetor (Fig. 9) is designed to
permit only the adjustement of L and H
screws in a range of 1/4 round; the ± 1/8
round the hall range admissible for L and H
screws is determined by the manufacturer
and you can not modify it.
WARNING: Don’t try to force the
screws outside the range!
WARNING: Don’t modify the
carburetor in any way in such
case the engine will not run
in compliance with emissions
regulations.
Idle Speed Adjustment
• If the engine starts, runs, and accelerates
but will not idle; turn the idle speed screw
“T” clockwise to increase idle speed (Fig.
9).
• If the cutting attachment turns at idle,
turn the idle speed screw “T” counter-
clockwise to reduce the idle RPM and stop
the cutting attachment movement. If the
cutting attachment still moves at idle speed,
contact a Servicing Dealer for adjustment
and discontinue use until the repair is made.
• Screw L must be adjusted so that the engine
promptly responds to sharp accelerations
and gives good idle operation.
• Screw H must be adjusted so that the

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18
Use only resistor type spark plugs of the
approved range.
Factors such as:
- too much oil in fuel mix;
- dirty air lter;
- unfavourable running conditions, e.g.
operating at part load;
may result in rapid deterioration of the spark
plug.
Mufer
WARNING! – This mufer is tted
with a catalytic converter needed
for the engine to be in compliance
with the emissions requirements.
Never modify or remove the
catalytic converter: failure to do
so is a violation of law.
WARNING! – Mufers tted with
catalytic converters get very hot
during use and remain so for
some time after stopping. This
also applies at idle speed. Contact
can result in burns to the skin.
Remember the risk of re!
CAUTION! – If the catalytic
converter is damaged it should
be replaced. If the mufer is
frequently blocked, this can be a
sign that the performance of the
catalytic converter is impaired.
Spark Arresting Mufer (Fig. 13)
WARNING: A faulty or altered
spark arrester system screen can
create a re hazard.
Starter Unit
WARNING: The coil spring is
under tension and could y apart
causing serious injuries. Never
try to disassemble or modify it.
Engine
Clean the cylinder ns with compressed air or
a brush periodically. Dangerous overheating
of engine may occur due to impurities on the
cylinder.
WARNING: Never run the machine
without all the parts, including
the starting housing, securely in
place.
Because parts can fracture and
pose a danger of thrown objects,
leave repairs to the ywheel and
clutch to trained Servicing Dealers.
Spark Plug
This engine uses a NGK CMR7H with .02”
(0.5 mm) electrode gap (Fig. 12). Use an
exact replacement and replace every six
months or more frequently, if necessary.
WARNING: Never test the
ignition system with ignition wire
connector removed from spark
plug or with unseated spark plug,
since uncontained sparking may
cause a re. A loose connection
between spark plug terminal and
ignition wire connector in the
boot may create arcing that could
ignite combustible fumes and
cause a re.
MAINTENANCE