GB
9
3. COMPONENTS AND CONTROLS
3.1 ENGINE COMPONENTS (FIG.1)
1. Oil filler cap with dipstick
2. Oil drain plug
3. Air cleaner cover
4. Fuel stopcock
5. Spark plug cap
6. 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.
Consult the machine’s Instructions Manual to
identify the throttle trigger and its positions,
usually marked by symbols, corresponding to:
CHOKE = to be used for starting from cold.
FAST = corresponds to maximum revs; to
be used when working.
SLOW = corresponds to minimum revs.
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 carburettor 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
altitude, 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 quantity
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.
a) Use only detergent oil classified SF-SG.
b) Choose the SAE viscosity grade of oil from
this chart:
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