13
ENGLISH
rating and with different intensity. Now we suggest checking the correct
idling calibration.
During the first flights or for the first 20 litres of petrol we suggest not
keeping the engine at the maximum rpm for too much time, conside-
ring that the 2-stroke engine doesn’t stand to the constant rpm even
if of medium power. We suggest varying the engine rpm. Check the
carburetion after the first landing. Repeat the running in every time
you change one of the following parts: piston, piston rings, cylinder,
crankshaft or main bearings.
5- ENGINE SWITCHING OFF
Switch the engine off by pressing the button till it completely stops.
If the engine is equipped with the Polini throttle control, the switch off
button is of red colour and you find it in the upper side; otherwise refer
to the frame/throttle’s manufacturer to find out the switch off button.
6- CHECK THE CARBURETION
The carburetion setting must be executed by professional people only.
It is possible to make a fast analysis of the carburetion by checking the
spark plug colour. To do it, switch the engine off after having run it for
some seconds under charge.
Remove the spark plug unscrewing it with the proper tool and verify
the colour of the porcelain that must be of light-brown colour with
tendency to dark. A light colour of the spark plug electrode means a
lean carburetion; if you use the engine in this conditions may cause the
engine failure. Do not use the engine in these conditions and apply to
an authorized retailer to set it up.
7- CLEANING
Clean the engine when it is switched off and cold to avoid burns. Clean
the engine with a soft cloth soaked with neutral cleansing and non-
aggressive.
!
WARNING:
Do not use acids that may damage the engine, the
painting and the rubber parts.
8- CARRIAGE
!
CAUTION:
Carry the engine only when it is cold.
Follow the frame manufacturer’s instructions for its carriage and how to
use the fuel tank during its carriage. Be careful of the petrol during the
carriage: its leaking may cause a fire.
!
CAUTION:
keep the propeller flange locked with its nut when
carrying the engine to avoid that the projecting threat may be damaged
or that an accidental fall may damage the shaft.
8.1- CARRIAGE OF THE ENGINE WITH BOWL CARBURETOR
The bowl carburetor has a breather pipe studied to carry the engine
when lying. To empty the carburator unscrew half turn the breather
brass nut (highlighted in photo 2 with an arrow) and wait till all the fuel
exit and enters the tank. Tighten the brass connection again. Now the
carburator is empty and you can lay the engine ready to be carried.
!
ATTENTION:
never unscrew more than half a turn the breather
nut to avoid damaging the OR seal. Never tight too hard.
02
9- ORDINARY SERVICING
!
ATTENTION:
THE SERVICING OPERATIONS MUST BE DONE BY
QUALIFIED PEOPLE ONLY. IF THE INSTRUCTIONS MENTIONED BELOW
WILL RESULT NOT CLEAR, WE SUGGEST ASKING FOR SPECIALISTS BY PO-
LINI MOTORI RETAILERS OR WHOLESALERS. FOLLOW CAREFULLY WHAT
DESCRIBED BELOW.
Maintenances and servicing necessary for the best set up of your engine
should be done regularly, or on all occasions before you start your en-
gine. All the tasks and adjustments described below can be done easily
by following the instructions given in this manual. Refer to your POLINI
MOTORI dealer for scheduled services and repairs, and insist that only
original spare parts are used to replace worn or broken components.
Refer to the servicing tables in sections 23 below for the frequency with
which the various servicing operations must be performed.
10- HOW TO BEHAVE WHEN FLYING
Maximum acceleration is recommended only to take off (full power) or
when really necessary!
In order to avoid a poor mixture from acceleration/ascent to level flight
conditions, loosen the engine till a descending phase and then gradually
accelerate again till achieving a level flight or a glide angle or a rise
angle wished. In this way you will be sure to maintain firm and effi-
cient the carburation, avoiding being over rpm with a minimum valve/
throttle opening. We remind you that two stroke engines do not stand
constant range for a long time too much. Take care of your engine
by varying now and then the rpm range. In this way the engine will
have constant performance and a good elasticity improving its working
during the time.
11- REMOVAL AND CLEANING OF THE AIR FILTER
Dirty air filter may compromise engine performance.
Clean the filter periodically or change it. Remove the filter loosening
the clamps, unscrew the 2 screws using a cross screwdriver, remove the
filter cover and then the filter. Wash the filtering material with water
and mild soap.
Dry the filter carefully and then moisten it with oil for filters. Clean filter
box inside using a cloth and check the presence of foreign bodies. Now
reassemble all the parts. Wash the filter for maximum 2-3 times and
then replace it with a new one.
!
WARNING.
If the filter becomes clogged with fine dust as well as
normal dirt, replace it with a new one.
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