29
Carburettor
The standard carburettor adjustment should not be altered. Should cleaning become necessary, the
greatest care should be taken when dismantling. The accelerator pump which is located under the
jet carrier must
not
be dismantled. Wash all parts in petrol, blow through the jets and reassemble.
Re–adjust the needle position and the air control screw exactly as it was. Should the carburettor
adjustment become changed, do not experiment but call on your HEINKEL Service Agent.
Carburettor setting
For carburettor adjustment see P. 9.
The figures show a longitudinal and transversal section as well as a cross–section through the
idling arrangement of the carburettor. The carburettor is mounted on the engine feed pipe by
means of a clip and a clip bolt.
The idling jet regulates the approximate quantity of fuel called for by idling running, whereas the
idling air regulating screw regulates the exact quantity.
The slide is opened fast, air speed increases as compared with fuel speed, so that the mixture
grows leaner and the engine output decreases. This is obviated in the case of this carburettor,
which is equipped with an accelerator pump, by the latter injecting a small quality of fuel into the
mixture chamber when the slide goes up. The accelerator pump therefore corrects mixture strength
during rapid opening of the throttle and is the means whereby easy starting is obtained.
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