Polini THOR 190 EVO Manual De Uso Y Mantenimiento página 15

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
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.
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.
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. 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.
9.1- REMOVE AND CLEAN THE AIR FILTER
Dirty air filter is one of the most common causes of poor engine
performance. Clean the filter periodically or change it. Remove the
filter loosening the clamps, unscrew the 4 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 being careful to place correctly the 4 bars that maintain the
filter in its position and tight the 4 screws again. 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.
WARNING. Dirty air filter may compromise the correct
operation of the engine and it causes poor performance. Torn or
broken filters can allow dirt to enter the engine and cause rapid
deterioration of the piston rings, piston and barrel.
9.2- INSTRUCTIONS TO STRETCH THE TRANSMISSION BELT
In order to grant longer life to the transmission belt a right stretch is
necessary. In order to avoid wrong stretches the engine is supplied
with a lever rod of a fix length.
Proceed as follow: remove the propeller from the engine, unscrew
counterclockwise of ¼ of turn all the 4 M7 nuts that fix the fixing
plate of the pulley/gear. (Photo 2)
How to place the stretching rod
One end of the lever is slightly bent: place one bent side under the
pulley hub of the reduction gear as shown in photo 3.
On the other side of the lever there is another bent side: place a
weight of 5 kg on it. If you do not have the weight to place on it use a
holder of 5 lit. and fill it till you reach the right weight.
It is very important to observe this weight (Photo 4). Now slightly
push the lever with its weight downwards (as indicated by the arrow
in photo 4), increasing of about the double the weight fitted.
Then take the hand off and let the weight act on the lever by itself.
Now tighten the M7 nuts again starting from the left one with 14 Nm
(1,4 Kgf.m) tightening. Remove the weight and the lever and fit the
propeller.
ATTENTION - IMPORTANT
Servicing and check of the belt stretching
The belt stretching is carried out by the engine's manufacturer. During
the first minutes of use the belt may bed; for this reason a stretching
must be executed after the first hour of use. Check it again after 4
hours and then every 8/10 hours and replace it with a new Polini
original belt every 50 hours of use or once a year.
If the belt does not have a proper stretch it will slip, reducing its life
and, what is worst, it may cause some vibrations that will damage the
engine or some parts of it.
For the models without clutch it is easier to feel the belt slip because
the max rpm will increase and you will notice a lack of trust.
13
ENGLISH