The carburetor

• A carburettor is an essential part of Petrol engines
• A typical carburettor has the following parts:
• An air filter- air is drawn into the engine via the air filter which cleams the air by removing dirty particles such as dust
• Choke/Choke valve-controls the amount of air that is entering the engine
• Closing the choke gives an air and petrol mixture that is richer in petrol and makes starting the engine easier
• Petrol is pumped into the engine and enters the carburettor through jets
• Jets-turns petrol into a fine mist spray in the chamber where air and petrol is mixed
• Worn jets might be blocked by dirt particles
• Petrol is filtered using a petrol filter  to remove dirt particles and thus prevent jets from being blocked
• The air filter and jets must be cleaned, serviced and replaced regularly to allow the engine to function efficiently
• The air and petrol mixture is introduced into cylinders where it is compressed, ignited by spark plugs and the resulting exhaust fumes expended through the outlet valve
• Throttle-is controlled by the accelerator, it controls the amount of the petrol, air mixture that passes through into cylinders and in turn the speed of the engine
• Particles in the air might also block jets
• Jets have to be cleaned and replaced regularly

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