Maintenance; General; Carburetor; Muffler - Poulan Pro PR48BT Manual De Instrucciones

General

Remove the ignition cable and the spark plug to carry out
inspection and maintenance. Keep all parts of your body
away from hot surfaces.

Carburetor

Adjustment of the idle speed
Before any adjustments are made, make sure that the air
filter is clean and the air filter cover is fitted.
The factory idle speed setting is: 2500 rpm
Use the adjustment screw at the upper edge of the
carburettor if the idle speed has to be adjusted.
Muffler
The muffler is designed to reduce the noise level and to
direct the exhaust gases away from the operator. The
exhaust gases are hot and can contain sparks, which may
cause fire if directed against dry and combustible
material.
The muffler on your machine is equipped with a spark
arrestor screen. NOTE: THE SPARK ARRESTOR
SCREEN ON THIS UNIT IS NOT SERVICEABLE. As
your unit is used, carbon deposits build up on the muffler
and spark arresting screen. For normal homeowner use,
however, the muffler and spark arresting screen will not
require any service. After 50 hours of use, we recommend
that your muffler be serviced or replaced by your
authorized service dealer.
CAUTION! Never use a machine with a defective muffler.
Check regularly that the muffler is complete and secured
correctly.
Make sure that the spark arrester and the exhaust duct
are screwed in place correctly.
WARNING! The muffler gets very hot
!
during use and remain so for some time
after stopping. This also applies at idle
speed. Contact can result in burns to the
skin. Remember the risk of fire!

MAINTENANCE

Cooling system

To keep the working temperature as low as possible the
machine is equipped with a cooling system.
The cooling system consists of:
• Cooling fins on the cylinder.
•

Air intake screen

Clean the cooling system with a brush once a week, more
often in demanding conditions. A dirty or blocked cooling
system results in the machine overheating which causes
damage to the piston and cylinder. Check that the nozzles
are not blocked.
Air intake screen
Check that the air intake is not blocked on all sides
including the underside, for example, by leaves or
rubbish. A clogged air intake reduces the machine's
blowing capacity and increases the engine's working
temperature, which can result in engine failure. Stop the
engine and remove the object.
!

Spark plug

The spark plug condition is influenced by:
• Incorrect carburetor adjustment.
• An incorrect fuel mixture (too much or incorrect type
of oil).
• A dirty air filter.
These factors cause deposits on the spark plug
electrodes, which may result in operating problems and
starting difficulties.
WARNING! Never use the blower if the
screen is not in place. Before use, check
that the screen is in place and
undamaged.
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English 17