TUNING THE ENGINE
Emptying the carburetor float chamber
Fire hazard Fuel is highly flammable.
Never refuel the vehicle near open flames or burning cigarettes, and always switch off the engine first. Be careful that no fuel
is spilt, especially on hot vehicle components. Clean up spilt fuel immediately.
The fuel in the fuel tank expands when warm and may emerge if overfilled. Follow the instructions on refueling.
Danger of poisoning Fuel is poisonous and a health hazard.
Fuel must not come into contact with the skin, eyes, or clothing. Do not breathe in the fuel vapors. If contact occurs with the
eyes, rinse with water immediately and contact a physician. Immediately clean contaminated areas on the skin with soap and
water. If fuel is swallowed, contact a physician immediately. Change clothing that is contaminated with fuel. Store fuel prop-
erly in a suitable canister and keep away from children.
Environmental hazard Improper handling of fuel is a danger to the environment.
Do not allow fuel to get into the ground water, the ground, or the sewage system.
Carry out this work with a cold engine.
Water in the float chamber results in malfunctioning.
Danger of poisoning Exhaust gases are toxic and inhaling them may
result in unconsciousness and/or death.
When running the engine, always make sure there is sufficient ventilation,
and do not start or run the engine in an enclosed space without an effec-
tive exhaust extraction system.
Adjust the idle speed with adjusting screw
Choke function deactivated – The choke knob is pushed in all the way. (
Turn idle air adjusting screw
begins to fall.
Note the position and turn the idle air adjusting screw slowly counterclockwise until
the idle speed falls again.
Adjust to the point between these two positions with the highest idle speed.
If there is a large engine speed rise, reduce the idle speed to a normal level
and repeat the above steps.
If the procedure described here does not lead to satisfactory results, the
cause may be a wrongly dimensioned idling jet.
If you can turn the idle air adjusting screw to the end without any change of
engine speed, you need to install a smaller idling jet.
After changing the idling jet, repeat the adjusting steps from the beginning.
Following extreme air temperature or altitude changes, adjust the idle speed
Turn tap handle
on the fuel tap to position OFF. (Figure L01603-10
Fuel no longer flows from the fuel tank to the carburetor.
1,400... 1,500 rpm
slowly in a clockwise direction until the idle speed