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Elements and Performance Criteria

  1. Prepare to diagnose and repair petrol carburettor system
  2. Diagnose petrol carburettor system
  3. Repair petrol carburettor system
  4. Complete work processes
  5. Prepare to diagnose and repair petrol carburettor system
  6. Diagnose petrol carburettor system
  7. Repair petrol carburettor system
  8. Complete work processes

Range Statement

This section specifies work environments and conditions that may affect performance. Essential operating conditions that may be present (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) are included. Bold italicised wording, if used in the performance criteria, is detailed below.

Safety and environmental requirements must include:

work health and safety (WHS) and occupational health and safety (OHS) requirements, including procedures for working with flammable petrol fuel

environmental requirements, including procedures for trapping, storing and disposing of fluids released from fuel systems.



Knowledge Evidence

Individuals must be able to demonstrate knowledge of:

work health and safety (WHS) and occupational health and safety (OHS) requirements relating to diagnosing and repairing petrol carburettor systems, including procedures for working with flammable petrol fuel

environmental requirements, including procedures for trapping, storing and disposing of fluids released from fuel systems

operating principles of petrol carburettor systems and associated components, including:

fuel atomisation

air-fuel ratios and combustion cycles

detonation and pre-ignition

venturi action

application, purpose and operation of petrol carburettor systems and components, including:

carburettor systems, including:

float system

idle system

fast idle system

main system

choke system

power system

accelerating system

single barrel carburettor operation, including:

mixture correction, including air-bleed, compensating jet, and metering rod mixture correction

manual and automatic choke operation

multi-barrel carburettors, including:

two-barrel and four-barrel carburettors

two-stage carburettors, including vacuum and mechanical control of second stage

diagnostic testing procedures for petrol carburettor systems, including:

fuel pump pressure, volume and vacuum testing

air-leak testing

cold-start enrichment testing

exhaust gas analysis

repair procedures for petrol carburettor systems, including procedures for:

installing fuel pumps

dismantling, cleaning, repairing and reassembling carburettors

removing, replacing and adjusting carburettors

post-repair testing procedures for petrol carburettor systems.