MAINTENANCE
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 is equipped with a special spark arrestor screen. The spark arrestor screen should be cleaned once a month. This is best done with a wire brush.
To remove the spark arrestor screen proceed as follows:
Remove the screws to the capillary tube and exhaust pipe.
Loosen the muffler’s 2 screws and remove the muffler.
Pull out the spark arrestor screen and clean using a wire brush. Replace the spark arrestor screen if it is defective.
CAUTION! Never use a machine with a defective muffler.
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!
Cooling system
To keep the working temperature as low as possible the machine is equipped with a cooling system.
The cooling system consists of:
4
1
2
3 
5
1Air intake on the underside of the blower.
2Nozzle for cooling the cylinder
3Cooling fins on the cylinder.
4Cooling air conductor (directs cold air over the cylinder).
5Emergency cooling nozzle
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.
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.
If the machine is low on power, difficult to start or runs poorly at idle speed: always check the spark plug first before taking any further action. If the spark plug is dirty, clean it and check that the electrode gap is 0.020 inch (0.5 mm). The spark plug should be replaced after about a month in operation or earlier if necessary.
CAUTION! Always use the recommended spark plug type! Use of the wrong spark plug can damage the piston/cylinder.
English – 15