13
ENGLISH
engine and let it idle until it warms up to normal temperature.
!
ATTENTION
: the engine is equipped with lead acid battery.
It is absolutely forbidden to use battery that are not standard lead-acid
ones as indicated in the assembly instruction of the tension regulator.
!
ATTENTION
: to install different batteries may cause serious
injuries or death.
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
normal temperature. We suggest running the engine 15 minutes at
medium-low engine power output gently accelerating and with diffe-
rent 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 SWITCING 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.
6 –CARBURETION CHECK
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 these conditions may cause
the engine failure. Do not use the engine in these conditions and apply
to an authorized retailer to set it up.
IMPORTANT
: Walbro carburetors have a plastic seal that limits the
(H) screw regulation to ¼ turn. This is enough to adjust the engines in
the different conditions of use. By removing this seal the warranty on
the engine is no more valid.
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,
paint and rubber parts.
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 fuel during
the carriage: fuel leaks may cause a fire.
!
ATTENTION
: while carrying the engine it is deeply suggested
to leave on it the prop’s flange, blocked with its nut. This in order to
avoid the damage of the protruding thread or that a fall could damage
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 carburetor unscrew half turn the breather brass nut
(highlighted in photo 2 with an arrow) and wait till all the fuel enters
the tank. Close the brass connection again. Now the carburettor 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 close too hard.
8.2-CARRIAGE OF THE ENGINE WITH WALBRO CARBURE-
TOR
The Walbro carburetor is sealed and if you tilt it the fuel does not leak.
For this reason it is possible to tilt the engine in every position without
having any leakage of fuel from the carburetor.
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
engine 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 components. Refer to the servicing tables in sections 12 below
for the frequency with which the various servicing operations must be
performed.
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