15
TUNING THE ENGINE
15.5
Emptying the carburetor float chamber
Danger
Fire hazard Fuel is highly flammable.
The fuel in the fuel tank expands when warm and can escape if overfilled.
–
Do not refuel the vehicle in the vicinity of open flames or lit cigarettes.
–
Switch off the engine for refueling.
–
Make sure that no fuel is spilled; particularly not on hot parts of the vehicle.
–
If any fuel is spilled, wipe it off immediately.
–
Observe the specifications for refueling.
Warning
Danger of poisoning Fuel is poisonous and a health hazard.
–
Avoid skin, eye and clothing contact with fuel.
–
Immediately consult a doctor if you swallow fuel.
–
Do not inhale fuel vapors.
–
In case of skin contact, rinse the affected area with plenty of water.
–
Rinse the eyes thoroughly with water, and consult a doctor in case of fuel contact with the eyes.
–
Change your clothing in case of fuel spills on them.
–
Keep fuels correctly in a suitable canister, and out of the reach of children.
Warning
Environmental hazard Improper handling of fuel is a danger to the environment.
–
Do not allow fuel to enter the groundwater, the soil, or the sewage system.
Info
Carry out this work with a cold engine.
Water in the float chamber results in malfunctioning.
Guideline
Choke function deactivated – The choke lever is pushed in to the stop. (
Idle speed
–
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.
Info
If the engine speed rises considerably, 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, start from the beginning with the adjusting
steps.
Following extreme air temperature or altitude changes, adjust the idle speed
again.
Preparatory work
–
Turn tap handle
on the fuel tap to the OFF position.
(Figure S01157-10
No more fuel flows from the fuel tank to the carburetor.
1,400... 1,500 rpm
slowly in a clockwise direction until the idle speed
p. 12)
73
p. 13)