F.F. Group GTL 900 PRO, Original Instructions Manual

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tion as well as before storage of long periods of
time with engine oil or a clean cloth damp with oil.
AIR FILTER
WARNING:
Operating the engine without an air cleaner, or with
a damaged air cleaner, will allow dirt to enter the en-
gine, causing rapid engine wear.
To check, clean or change the air filter (Fig. 11):
1. Remove the air filter cover.
2. Make sure that the air filter element is free
from dirt and in a good condition. If it is dirty,
remove and clean it.
f
To clean a foam air filter element wash it with
home detergent and hot water and let it dry.
Then soak it in clean saturated engine oil and
gently squeeze out excess oil. If required, re -
place it with a new one.
f
To clean a paper air filter element, clean light
dirt by gently taping it a few times on a hard
surface and replace if heavy dirt is present.
3. Clean the inside of the air filter case and cov -
er from dirt with a soft cloth. If the engine is
equipped with an oil bath type air filter, replace
the oil with new engine oil.
4. Reinstall the air filter element and follow the
reverse procedure to put back in position the
air filter cover.
WARNING:
Never clean the air filter with flammable or low
flash-point detergents to avoid the risk of a fire or
explosion.
NOTE:
If the engine frequently works under dusty or oth -
er severe circumstances, clean the air filter every 10
hours and add change its oil with new. If necessary,
change the air filter element every 25 hours.
SPARK PLUG
To maintain the spark plug (Fig. 17.1):
1. Remove the spark plug cap to access the spark
plug.
2. Use an appropriate spark plug tool (Fig. 17.2) to
carefully remove the spark plug.
3. Inspect the condition of the spark plug and its
electrode. It must be clean and not worn. Check
that the spark plug gap is between 0.7 and
0.8mm (Fig. 17). Replace the spark plug with a
new one, if needed.
4. Carefully thread the spark plug into the engine
by hand.
5. Once threaded, use the appropriate spark plug
tool to tighten the spark plug, paying atten -
tion not to use excessive force damaging the
threads.
6. Re-attach the spark plug cap.
WARNING:
Never allow dirt or debris to enter the cylinder bore.
Before removing the spark plug, thoroughly clean
the spark plug and cylinder head area.
FUEL SEDIMENT CUP
WARNING:
Maintain the fuel carburetor only outdoors and in
well ventilated areas.
To maintain the fuel sediment cup:
1. Turn the fuel valve to the “OFF” position.
2. Remove the carburetor fuel sediment cup (Fig.
18.2) with its rubber seal ring (Fig. 18.1).
3. Wash the removed parts in solvent, dry them
thoroughly.
WARNING:
Never clean the fuel sediment cup with flamma -
ble or low flash-point detergents to avoid the risk
of a fire or explosion.
4. Replace the rubber seal ring with a new one if
needed.
5. Reinstall the rubber seal ring and sediment cup
and secure in position.
6. Turn the fuel valve to “ON” position and check
for any fuel leaks.
FUEL FILTER
The fuel tank may be fitted with a filter, depend -
ing on tiller model, situated at the fuel tank cap.
The fuel filter can be picked out and should be
checked periodically. If the filter is dirty, clean it
and replace it with a new one when required. In
case the inside of the fuel tank is dirty, it can be
cleaned by rinsing the fuel tank with clean petrol.
CLEANING
Use a small soft brush to clean the outside of the
unit. Do not use strong detergents. Household
cleaners that contain aromatic oils such as pine
and lemon and solvents such as kerosene can
damage plastic housing or handle. Wipe off any
moisture with a soft cloth. The tines and fenders
can be cleaned with water using a garden hose.
STORAGE
WARNING:
Never store the unit with fuel in the tank and always
allow the unit to cool before storing. Store the unit
only in dry and well ventilated areas.
In case the unit will be stored for an extended time,
use the following storage procedure:
1. Drain all fuel from the fuel tank.
2. Start the engine and allow it to run until it
stalls. This ensures that all the fuel has been
drained from the carburetor.
3. Replace the engine oil with new.
4. Replace the gearbox oil with new.
5. Replace the air filter oil with new, if the air filter
is oil bath type.
6. Remove the spark plug and put 30 ml of
high quality motor oil into the cylinder. Pull the
starter rope slowly to distribute the oil. Rein -
stall the spark plug.
7. Thoroughly clean the unit and inspect for
any loose or damaged parts. Repair or replace
damaged parts and tighten loose screws, nuts
or bolts.
8. Lubricate all parts required with an oil damp
cloth to avoid rust built-up.
ENVIRONMENTAL PROTECTION
Recycle raw materials instead of disposing as
waste. Machine, accessories and packaging should
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