15
ENGLISH
to be reached by the pilot. The engine has two separated ignitions and
the console let you check the correct working of both the ignitions.
When the ignition is on OFF position the engine is switched off and the
electric starter does not work. By moving the switch to ON position the
led will light.
Use the central black key (START) to start the engine. After having
started the engine keep KEY 1 pressed to disable ignition 1 and it is
possible to check the correct working of ignition 2. The engine must
keep on working. Now release KEY 1.
Repeat the test keeping KEY 2 pressed. It disables ignition 2 and it is
possible to check the correct working of ignition 1. The engine must
keep on working. Now release KEY 2.
Now to end the test press KEY1 and KEY2 simultaneously, so disabling
both the ignitions. The engine now has to stop.
Now start the engine again and it is ready to fly.
NOTE 1: to switch the engine off in standard conditions use the switch
moving the level in OFF position.
NOTE 2: The secondary electronic ignition works using the battery. This
ignition, if fed, (switch in ON position) has an electric input even with
the engine switched off. This input can discharge the battery in a few
days. It is important to re-position the cut-out switch in OFF position.
(LED switched off)
NOTE 3: If the battery should be completely discharged it is possible to
use the engine by starting it manually. Keep into consideration that till
the battery does not reach a minimum charge level the engine will
work with one ignition only.
4- RUNNING IN
Run your engine in as instructed below to ensure that the engine and
transmission bed in correctly and to ensure continuous reliability in
future. Once the engine starts, leave it idling until it warms up to nor-
mal temperature. We suggest running the engine 15 minutes at me-
dium-low engine power output gently accelerating and with different
intensity. Now we suggest checking the correct idling calibration. Du-
ring 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 car-
buretion 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 the complete stop.
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.
For the Thor 250 Dual Spark move the lever of the control board in OFF
position to disconnect simultaneously both the ignitions and switch the
engine off
6- 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 second 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-ag-
gressive.
!
WARNING:
Do not use acids that may damage the engine.
8- CARRIAGE
!
ATTENTION:
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.
!
ATTENTION:
During the carriage of the engine it is strictly re-
commended to maintain the propeller locked together with its nut in
order to avoid that the flange thread that sticks out may be damaged
or in case of fall it might break the crankshaft.
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 carburettor unscrew half turn the breather
brass nut (highlighted in photo 2 with an arrow) and wait till all the fuel
enters the tank. Tighten the brass connection again. Now the carburet-
tor 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.
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
POLINI MOTORI RETAILERS OR WHOLESALERS. FOLLOW CAREFULLY
WHAT DESCRIBED BELOW.
Maintenances and servicing necessary for the best set up of your engi-
ne should be done regularly, or on all occasions before you start your
engine. 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 com-
ponents. Refer to the servicing tables in sections 12 below for the fre-
quency with which the various servicing operations must be performed.
9.1- REMOVE AND CLEAN THE AIR FILTER
Dirty air filter is one of the most common causes of poor engine perfor-
mance. Clean the filter periodically or change it. Remove the filter loo-
sening the clamps, unscrew the 4 screws using a cross screwdriver, re-
move the filter cover and then the filter. Wash the filtering material
with water and mild soap. Dry the filter carefully, and then moisten it
Содержание Thor 250
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