Polini THOR 250 Notice D'utilisation page 19

wheel and the old rope. Thread the new rope in its hole (photo 6), wind
up the rope on the wheel (according to the entrance sense of the rope
on the wheel) (Photo 7).
Now insert the plastic wheel in its housing again, and check through the
hole that the internal spring hook is perfectly coupled (Photo 8),
place the springs, the teeth for the starter jaw and screw the cover
again using medium thread-locker.
All the parts in movement, including the springs, must be well lubrica-
ted. Now go on by charging the return spring: take the head of the rope
leaving 10-20 cm coming out the hole with "u" shape on the wheel
side. Turn the wheel three times in counter clock-wise sense till it stops
in front of the exit hole on the aluminium case. Keeping the plastic
wheel stopped, pass the rope through the case hole. Insert the handle
and the washer and tie a single knot as shown in photo 9.
!
ATTENTION: verify that the return spring does not reach the end
of the stroke. Pull the rope completely and turn the wheel again to
check that it can make at least one turn before stopping.
This test is very important because the spring hasn't been studied to
reach the end of the stroke and, if it happens, the spring will break.
Reassemble the starter in the engine and tight the 4 screws (M5) with
strength (see the tightening torque values table).
9.5- HOW TO CHECK THE COOLING SYSTEM LEVEL
Periodically check the cooling system: when the engine is cold the coo-
lant must reach half of the bottle. If necessary add some liquid, using
the one specific for aluminium radiator.
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!
ATTTENTION: never open the cap when the engine is hot, you
could burn.
9.6- HOW TO EMPTY THE COOLING SYSTEM
If necessary empty the cooling system by unscrewing the proper screw
(see photo 10)
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and collect the leaking liquid. Remove the cap to make this operation
easier.
!
ATTENTION: Do not empty it when the engine is hot, you could
burn.
9.7- HOW TO FILL IN THE COOLING SYSTEM
Fill in the cooling system using coolant specific for aluminium radiator
till ½ of the water charging bottle. For systems with low radiator make
the air exits from the breather hole of the 90° pipe fitted on the head
(photo 11) or from any other breather holes fitted by the manufacturer.
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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 accelera-
tion/ascent to level flight conditions, loosen the engine till a descen-
ding 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 efficient 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.
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ENGLISH