Hyundai HYBCF31 User Manual page 18

Cleaning
1. Keep your machine clean, the outside of the machine can be cleaned using a damp soft cloth
with a mild detergent if required, never use water to clean the machine as it may cause damage
to internal parts.
2. Some maintenance products and solvents may damage the plastic parts, these include products
containing benzene. Trichloroethylene, chloride and ammonia.
3. Take special care to keep the ventilation inlets /outlets free from obstruction. Cleaning with a soft
brush followed by a compressed air jet will usually be su ent to ensure acceptable internal
cleanliness.
4. Wear eye protection when carrying out cleaning.
Adjusting of carburettor
The carburetor governs the engine's speed via the throttle control. Air and fuel are mixed in the
carburettor. The air/fuel mixture is adjustable. Correct adjustment is essential to get the best
performance from the machine.
Adjusting the carburettor means that the engine is adapted to local operating conditions, e.g. climate,
altitude, petrol and the type of 2-stroke oil.
The engine has been tested in the factory with initial adjustment. The user need not adjust the
carburettor.
To ensure that it continues to run at peak performance and to minimise harmful exhaust emissions
after the running-in period, please always contact the authorised service to adjust the carburettor.
Adjusting of idle speed
A screw just behind air
idle speed, if it's necessary.
Before any adjustment, make sure that the air ter is clean and the air ter cover is
Turn the screw clockwise can give a higher idle speed; turning it anti-clockwise gives a lower idle
speed.
The idle speed is correctly adjusted when the engine runs smoothly in every position. There should
also be a clear margin to the speed at which the blades start to move. The blades must also remain
stationary when the choke control is in the start throttle position.
er cover regulates the throttle setting at idle speed. The user can adjust the
Hyundai HYBCF31 Brush Cutter & Grass Trimmer
Page 18
Operator's Manual
ed.
Rev 3