JAWA ZVL 210 Service Manual - page 13

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Checking and adjusting fuel level in float

2. Checking fuel level using the jig illustrated

chamber                                               

 in Fig. 22a

Check and adjust the fuel level after every

renewal of the fuel float or if the fuel leaks from

After having adjusted, the fuel level mechanically

the carburettor and the leakage is not due to a

it is recommended to check the adjustment

defective float or needle. Fuel level adjusting pro-

with the help of the jig which you can make

cedure:-.

of plexiglass (Perspex) according to the drawing.

Screw the jig on to the float chamber (bottom

1. Rough (mechanical) adjustment -- see Fig. 22

drain screw) and admit fuel into the carburettor.

Its level should reach the centre index line with

With the carburettor removed from the engine,

a tolerance of ± 1 mm. If this is not the case, ad-

remove the float chamber cover. Turn the carbu-

just the floats by bending the arms upward

rettor so that the floats are directed upwards,

or downward as necessary. The fuel level adjusted

Check that the floats move freely on the spindle

in this way complies with the manufacturer's

and that they are perpendicular to the carburettor

requirements. When checking the fuel level in the

centre line. Check also their height which must

carburettor removed from the engine, it is necessary

reach the level of the venturi tube top edge. If

to observe the same height of the pressure column

this is not the case, adjust the height of both floats

as exists between the fuel tank and the carburettor

by bending the arms. Floats adjusted in this way

fitted on the engine.

should maintain the fuel in the float chamber

at the correct level.

ZVL model 210   Workshop Manual   Page 15            

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