MAINTENANCE
Muffler with catalytic converter
Cooling system
A muffler fitted with a catalytic converter reduces the extent of the following substances in the exhaust fumes:
•Hydrocarbons (HC). Some hydrocarbons in gasoline and the exhaust are carcinogenic.
•Nitric oxides (NO). Irritating for the breathing
•Aldehydes. The most common formaldehyde, is carcinogenic and causes hypersensitiveness.
NOTE! The level of carbon monoxide is not reduced. This is an odourless and extremely poisonous substance. Therefore avoid exposure without good air circulation.
The muffler is also designed to dampen the noise level and to direct the exhaust fumes away from the user. The exhaust fumes are hot and can contain sparks, which can result in fire if the exhaust fumes are directed towards a dry or inflammable material. Some mufflers are fitted with a special spark arrest screen. If your machine is fitted with this type of muffler then the screen should be cleaned at least once a week. This is done using a wire brush. If the screen is damaged in any way it should be replaced. If the screen is blocked this will
To maintain as low operating temperature as possible the engine is equipped with a cooling system.
The cooling system consists of:
1.An air intake on the starter unit.
2.Cooling fins on the flywheel.
3.Cooling fins on the cylinder
4.Cylinder cover (leads cold air onto the cylinder).
Clean the cooling system using a brush at least once a week, in difficult conditions more often.
A dirty or blocked cooling system leads to the engine overheating resulting in damage to the cylinder and piston.
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result in engine overheating and damage to the cylinder and piston.
NOTE!
Never use a machine with a defective muffler.
!WARNING!
Mufflers fitted with catalytic converters become extremely hot during use and after stopping. This also applies at idling speeds. Contact can result in burns to the skin. Be observant to the risk of fire!
!WARNING!
The coating on/in the catalytic element can be hazardous to health if consumed. Wear gloves when carrying out service work on the catalytic converter.
Air filter
The air filter should be cleaned regularly removing dust and dirt to avoid:
•carburetor malfunction
•starting problems
•reduced engine power
•unnecessary wear to engine parts
•abnormal fuel consumption Clean the filter after every 25 hours or more regularly if operating conditions are exceptionally dusty.
Cleaning the air filter
Dismantle the air filter cover and remove the air filter. Wash in clean, warm soapy water. Ensure that the filter is dry before refitting. An air filter used for a long period of time can never be cleaned com- pletely. Therefore it is neces- sary to replace the filter from time to time with a new filter. A damaged air filter must always be replaced.
18 – English