8. Technical data ........................................... 8
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1
1. GENERAL INFORMATION
1.1
READING AND UNDERSTANDING
THE MANUAL
Some paragraphs in the manual containing information of particular importance for safety and
operation are highlighted at various levels of
emphasis, and signify the following:
These give details or further information on
what has already been said, and aim to prevent
damage either to the engine or other damages.
!
WARNING!
sult in the risk of injury to oneself or others.
!
DANGER!
sult in the risk of serious injury or death to
oneself or others.
NOTE
“front”, “rear”, “right” and “left”,
are to be taken as referring to the
engine positioned with the spark
plug facing forwards with respect
to the observer.
or
Non-observance will re-
Non-observance will re-
All indications,
IMPORTANTNOTE
2. GENERAL SAFETY STANDARDS
(To be strictly applied)
A) TRAINING
1 Carefully read the instructions contained in
this manual and the instructions of the
machine on which this engine is installed.
Learn how to stop the motor quickly.
2) Never allow people unfamiliar with these
instructions to use the engine.
3) Never use the engine while people, especially children, or pets are nearby.
4) Remember that the operator or user is
responsible for accidents or hazards occurring to other people or their property.
The number before the paragraph title refers to
the text references and their related figures
(shown inside front and back covers).
1.2
SAFETY SYMBOLS
Your engine should be used with due care and
attention. Symbols have therefore been placed
on the engine to remind you of the main precautions to be taken. Their full meaning is explained
later on.
You are also asked to carefully read the safety
regulations in the applicable chapter of this
handbook.
Warning! - Read and follow Operating Instructions before running engine.
Warning! - Keep away from hot surfaces.
Warning! - Petrol is flammable. Allow
engine to cool at least 2 minutes before
refuelling.
Warning! - Engines emit carbon
monoxide. DO NOT run in enclosed
area.
B) PREPARATION
1) Do not wear loose-fitting clothing, dangling drawstrings, jewels or items that could
become caught; tie up long hair and keep at
safe distance while starting the lawnmower.
2) Turn engine OFF and let it cool before
removing gas cap.
3) WARNING: DANGER! Fuel is highly flammable:
– store the fuel in special containers;
– refuel only outdoors by using a funnel;
never smoke while refueling and/or handling fuel;
– add fuel before starting the engine. Never
remove the cap of the fuel tank or add fuel
while the engine is running or when the
2
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engine is hot;
– if you have spilt some fuel, do not attempt
to start the engine but move the machine
away from the area of spillage and avoid
creating any source of ignition until the fuel
has evaporated and fuel vapours have dissipated.
– always put the tank and fuel container caps
back on and tighten well.
4) Replace faulty silencers and the guard, if
damaged.
C) OPERATION
1) Do not operate the engine in a confined
space where dangerous carbon monoxide
fumes can collect.
2) Do not use starting fluids or similar products.
3) Do not change the engine governor settings or overspeed the engine.
4) Do not tilt the machine onto its side to prevent fuel leaks from the fuel tank cap.
5) Do not touch the cylinder fins and/or the
silencer guard until the engine has cooled
down.
6) Stop the engine and disconnect the spark
plug cable before checking, cleaning or servicing the machine or the engine.
7) Do not crank the engine with spark plug
removed.
8) Transport the machine with an empty fuel
tank.
3. COMPONENTS AND CONTROLS
3.1
ENGINE COMPONENTS
1. Rope handle
2. Fuel tank fillercap
3. Oil fillercap with dipstick
4. Air cleaner cover
5. Silencer
6. Silencer guard
7. Spark plug cap
8. Engine code
✍
Note your engine
serial number here
3.2
ACCELERATOR CONTROL
The throttle trigger (generally a lever), fitted to
the machine, is connected to the engine by a
cable (1).
Consult the machine’s Instructions Manual to
identify the throttle trigger and its positions, usually marked by symbols, corresponding to:
D) MAINTENANCE AND STORAGE
1) A routine maintenance is essential for
safety and for keeping a high performance
level.
2) Do not store the machine with fuel in the
tank in an area where the fuel vapours could
reach an open flame, a spark or a strong heat
source.
3) Allow the engine to cool before storing in
any enclosure.
4) To reduce fire hazards, keep the engine,
exhaust silencer, and fuel storage area free of
grass cuttings, leaves, excessive grease or
any other easily inflammable material.
5) If the fuel tank has to be drained, this
should be done outdoors once the engine has
cooled down.
6) On safety ground, never use the engine
with either worn or damaged parts. Parts are
to be replaced and not repaired. Use genuine
spare parts. Parts that are not of the same
quality can damage the engine and impair
your safety.
CHOKE = to be used for cold starting.
FAST= corresponds to maximum revs;
to be used when working.
SLOW = slowest speed.
STOP = engine stop (if fitted).
4. WHAT YOU NEED TO KNOW
The engine performance, reliability and life are
influenced by many factors, some external and
some strictly associated with the quality of the
products used and with the scheduled maintenance.
The following information allow a better understanding and use of your engine.
4.1
ENVIRONMENTAL CONDITIONS
The operation of a four-stroke endothermic
engine is affected by:
a) Temperature:
– Working in low temperatures could lead to a
difficult cold starting.
– Working in very high temperatures could lead
to a difficult hot starting due to the evaporation of the fuel either in the carburetor float
chamber or in the pump.
– In any case, the right kind of oil must be used,
according to the operating temperatures.
b) Altitude:
– The higher the altitude (above sea level), the
lower the max power developed by an
endothermic engine.
– When there is a considerable increase in alti-
tude, the load on the machine should be
reduced and particularly heavy work avoided.
4.2
FUEL
A good quality fuel is the major issue for the
engine reliability of operation.
a) Use unleaded gasoline, with a minimum of 90
octane.
b) Use clean, fresh fuel; purchase fuel in quanti-
ty that can be used within 30 days, to prevent
gum from forming inside the container or the
tank.
c) Do not use fuel which contains Methanol.
d) Do not add neither oil nor any kind of fuel
additive.
4.3
OIL
Use always high quality oils, choosing their viscosity grade according to the operating temperature.
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a) Use only detergent oil classified SF-SG.
b) Choose the SAE viscosity grade of oil from
this chart:
– from 5 to 35 °C= SAE 30
–
from -15 to + 5 °C=
– from -25 to + 35 °C = Synthetic oils
c) The use of multi-viscosity oils in hot temper-
atures will result in higher than normal oil consumption; therefore, check oil level more frequently.
d) Do not mix oils of different brands and fea-
tures.
e) SAE 30 oil, if used below +5°C, could result in
possible engine damage due to inadequate
lubrication.
f) Oil should be at «MAX» mark (see 5.1.1): do
not overfill. Overfilling with oil may cause:
– Smoking;
– Spark plug or air filter fouling, which will
cause hard starting.
4.4
AIR FILTER
The air filter must always be in perfect working
order, to prevent debris, dirt or dust from getting
sucked into the engine, reducing the efficiency
and working life of the machine.
a) Always keep the filter element free of debris
and dirt in perfect working order (see 6.5).
b) If necessary, replace the filtering element with
an original spare part. Incompatible filtering
elements can impair the efficiency and life of
the engine.
c) Never start the engine without mounting the
filtering element properly.
4.5
SPARK PLUG
Not all the spark plugs for endothermic engines
are the same!
a) Use only spark plugs of the recommended
type, with the right heat range.
b) Check the length of the thread, because – if
too long – it will damage the engine beyond
repair.
c) Make sure that the electrodes are clean and
their gap is correct (see 6.6).
5W-30 or 10W-30
(Multi-viscosity)
5W-30 or 10W-30
(Multi-viscosity)
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5. STANDARDS OF USE
5.1
BEFORE EVERY USE
Before every use, perform the following checking
procedures in order to assure a regular operation.
5.1.1
Check oil level
See the specific chapter (see 8.1) for the oil to be
used.
a) Place engine level.
b) Clean around oil fill.
c) Unscrew the cap (1), clean the end of the dip-
stick (2) and insert it, as illustrated, without
screwing it down.
d) Remove the cap with the dipstick and check
the oil level that must be between the «MIN»
and «MAX» marks.
e) If oil is required, add oil of the same kind up
to the «MAX» mark, being careful not to spill
any outside the oil fill.
f) Fully tighten the fillercap (1) and wipe off any
spilled oil.
5.1.2
Check air cleaner
The efficacy of the air cleaner is crucial for the
good performance of the engine; never start the
engine if the filter element is missing, broken or
insufficiently saturated with oil.
a) Clean around the filter cover (1).
b) Remove the cover (1) by releasing the tabs
(2).
c) Check the condition of the filtering element
(3). It must be intact, clean and in perfect
working order; if not, either carry out maintenance or replace it (see 6.5).
d) Put the cover (1) back.
Add fuel only when the engine is cold.
a) Place the lawnmower level.
b) Clean around the fillercap (1).
c) Remove the fillercap (1).
d) Using a clean funnel (2), add fuel until it
reaches the internal lip (3) of the filler, taking
care not to spill any fuel.
e) Tighten the fillercap (1) back and clean any
spilled fuel.
5.1.4
Spark plug cap
Firmly connect the cable cap (1) to the spark
plug (2), making sure that there are no traces of
debris or dirt inside the cap or on the spark plug
terminal.
5.2
STARTING THE ENGINE (cold)
The engine must only be started when all the
accessory devices are disconnected (if fitted on
the machine) and when the gear (where fitted) is
in neutral.
– Move the throttle (1) to «CHOKE».
– Set the machine controls as indicated in the
machine’s Instructions Manual.
• Manual starting
a) Hold the starter rope grip (3) and pull it slow-
ly until you feel some resistance, then tug the
starter rope hard.
b) When the engine starts, let go of the rope.
NOTE
immediately, repeat the above steps.
If the engine fails to start
5.1.3
Adding fuel
IMPORTANT
plastic parts of the motor or the machine to
prevent damaging them and remove all traces
of spilt petrol immediately. The warranty does
not cover damage to plastic parts caused by
petrol.
See “Technical Data” chapter (see 8.1) for the
fuel characteristics.
Do not drip petrol onto the
• Electric starting (if provided)
a) Turn the starter key (4) as described in the
machine’s instruction manual.
After a few seconds, slowly move the throttle (1)
from «CHOKE» to either «FAST» or «SLOW».
NOTE
not keep running, repeat the above steps with
the throttle on «FAST».
If the engine starts but does
5.3
STARTING THE ENGINE (hot starting)
•) Follow the whole cold-starting procedure
with throttle control (1) in «FAST» position.
5.4
USE OF THE ENGINE IN OPERATION
When mowing, use the engine at its max rpm by
moving the throttle control to «FAST» position.
!
WARNING!
from the silencer and surrounding areas
that can become extremely hot. With the
engine running, do not get loose-fitting
clothing (ties, scarves, etc.) or hair closer to
the top part of the engine.
IMPORTANT
inclines to prevent malfunctioning of the
engine.
5.5
STOPPING THE ENGINE DURING
MOWING
a) Move the throttle (1) to «SLOW».
b) Stop the engine as described in the ma-
chine’s instructions manual; in the case of
engines with electric ignition, move the throttle to «STOP», or turn the key (3) (if present)
to «OFF».
Keep your hands away
Do not operate on over 20°
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b) Preferably use a compressed air gun (max. 6
bars), to prevent debris, dirt or dust from penetrating inside the machine.
c) Store the lawnmower (and the engine) in a dry
place, sheltered from severe weather conditions and sufficiently ventilated.
5.8
LONG STORAGE (over 30 days)
In case the engine has to be stored for a long
time (for example at the end of the season), a
few precautions are needed to help the future
start-up.
a) Drain fuel from tank to prevent build-ups
inside the tank.
b) Remove the spark plug and pour inside the
spark plug hole about 3 cl of clean engine oil.
Close the hole with a cloth, then pull, slowly
and carefully, the starting rope so that, with a
few engine revolutions, the oil will be distributed on the cylinder inner walls. Reinstall the
spark plug without connecting the cable cap..
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5.6
STOPPING THE ENGINE AFTER
MOWING
a) Move the throttle (1) to «SLOW».
b) Stop the engine as described in the ma-
chine’s instructions manual; in the case of
engines with electric ignition, move the throttle to «STOP», or turn the key (3) (if present)
to «OFF».
c) When the engine is cold, disconnect the
spark plug (4) and remove the key (3) (if present).
d) Remove all traces of debris or dirt from the
engine and especially around the exhaust
silencer to reduce the risk of fire
5.7
CLEANING AND STORAGE
a) Do not spray with water or use hydraulic
lances to clean the exterior of the engine.
6
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6. MAINTENANCE
6.1
SAFETY RECOMMENDATIONS
!
WARNING!
cap and read instructions before carrying
out any cleaning, repair or maintenance
operation. Wear proper clothing and working gloves whenever your hands are at risk.
Do not perform maintenance or repair operations without the necessary tools and
technical knowledge.
IMPORTANT
or other pollutants in unauthorised places.
IMPORTANT
the Machine’s Instruction Manual), the engine
can be laid down on its right side, or the front
part can be lifted, taking care not to allow oil or
fuel to leak out.
6.2
MAINTENANCE SCHEDULE
Follow the hourly or calendar – whichever occur
first – maintenance schedule shown in the following table.
Remove the spark plug
Never get rid of used oil, fuel
If necessary (if foreseen in
6.3
CHANGE OIL
See the specific chapter (see 8.1) for the oil to be
used.
!
WARNING!
Drain oil while the engine
is warm, being careful not to touch the hot
engine nor the drained oil.
a) Place engine level.
b) Make sure that the fuel tank is not full and
that the cap is properly closed.
c) Clean around oil fill (1).
d) Remove the fillercap (1).
e) Have a container ready (2) to collect the oil.
f) Tip the lawnmower on its right side so that
the oil will drain from the oil fill (3).
g) Place the lawnmower level and top up with
new oil (see 5.1.1).
h) Check the oil level on the dipstick (4). Oil
should be at «MAX» mark.
j) Close the fillercap and wipe off any spilled oil.
NOTE
The oil capacity is about
0.55 liter.
Operation
or daily
Every 5 hours
Every 25 hours or
After First 5 hours
Check oil level
(see 5.1.1)
Change oil
1)
(see 6.3)
Clean silencer and engine
see 6.4)
Check air cleaner
2)
(see 6.5)
Air filter replacement
(see 6.5)
Check spark plug
(see 6.6)
Replace spark plug
(see 6.6)
1)
Change oil every 25 hours if the engine is
operating under heavy load or in ht weather.
2)
Clean air cleaner more frequently if the
-✔--
✔--✔
-✔--
-✔--
--✔-
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machine is operating in dusty areas.
Silencer must be cleaned when the engine is
cold.
every season
a) Use a jet of compressed air or a brush to
every season
Every 50 hours or
b) Clean the cylinder and cylinder head fins (3)
c) Clean the plastic components with a sponge
The filtering element must be kept perfectly
clean and must be replaced if it is broken or
damaged.
a) Clean around the filter cover (1).
b) Remove the cover (1) by releasing the tabs
c) Remove the filtering element (3 or 3a).
6.4
CLEAN SILENCER AND ENGINE
remove any debris and dirt that could cause
a fire from the silencer (1) and its protective
cover (2).
to ease engine cooling and prevent overheating.
(4) soaked in water and detergent.
6.5
AIR FILTER CHECK AND MAINTENANCE
(2).
d) Block the inlet duct (5) with a rag to prevent
any dirt from entering.
e) Carry out maintenance on the filtering ele-
ment as described below for each type.
f) Clean inside the filter housing (4) to get rid of
any dust, debris or dirt, taking care not to
push anything into the induction pipe (5).
g) Put the filtering element (3 - 3a) back in place
and close the cover (1).
• Sponge filtering element (3)
Keep the filtering element clean and soaked in
oil. Replace it if it is disintegrating, cut or broken.
IMPORTANT
to clean the filtering element.
– Clean the sponge filtering element with water
and detergent and dry it with a clean cloth.
– Soak the filtering element in 2 tablespoonfuls
of clean engine oil and wring it well to distribute the oil evenly.
– Remove any excess oil with a clean cloth.
If you need to replace the filtering element, oil
the new filter as described above.
Do not use compressed air
EN
6.7
ADJUSTMENT OF THE
ACCELERATOR CABLE
If the engine does not reach its maximum rpm
with the throttle control in «FAST» position, this
is likely due to an out-of-phase connection
between the accelerator lever and the governor
lever.
To restore the correct phase:
a) Stop the engine, remove the spark plug cap
and wait until the engine has cooled.
b) Loosen the screw (1) of the clamp (2) so that
the cable casing (3) is free to move.
c) Move the throttle control to «CHOKE».
d) Move governor control lever (4) forward as far
as possible and, by keeping it in this position,
lock the casing (3) full tightening the screw (1)
of the clamp (2).
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• Cartridge filtering element (3a)
– Blow compressed air from the inside to remo-
ve dust and debris.
6.6
SPARK PLUG SERVICE
a) Remove the spark plug (1) using a spark plug
socket wrench (2).
b) Clean the electrodes (3) with a metal brush
and remove any carbonaceous build-up.
c) Using a thickness gauge (4), check for the
right gap (0.6 - 0.8 mm) between the electrodes.
d) Install the spark plug (1) and tighten with a
socket wrench (2).
Replace the spark plug if the electrodes are
burnt or if the porcelain is broken or damaged.