Training Details


Gas Engine Basics

Course Date
Apr 09 - 12
Course Duration
4 Days


This course covers the fuel, exhaust and ignition systems of Caterpillar® gas engines with particular emphasis on the G3300, G3400 and G3500 Stoichiometric and Lean Burn gas engine principles. The script and labs are based on a running G3406 engine. This is a Caterpillar certified course.


Students must provide their own safety glasses, steel toed footwear, hard hats and fire retardant coveralls with reflective stripe.


After completion of the course the participant will be able to:

  • Explain the operating principles of Caterpillar® engines.
  • Identify the effect of temperature and altitude on developed horsepower.
  • Explain the high heat value (HHV) and low heat value (LHV) of fuels.
  • Explain the effects of the fuel BTU content.
  • Determine the proper gas pressure and set the main pressure regulators.
  • Disassemble, assemble, and adjust a Main Pressure regulator and Impco carburetor.
  • Check and properly adjust carburetor linkage.
  • Understand how to balance banks of dual carburetor, Vee type engines.
  • Determine the effect of turbochargers, aftercoolers and waste gates on engine performance.
  • Demonstrate how to set the operating pressure of the adjustable waste gate.
  • Install and time an Altronic III magneto.
  • Troubleshoot the ignition systems.
  • Explain the operation of the basic engine protection system.
  • Determine the approximate horsepower of a Stoichiometric engine from the “absolute” manifold pressure.
  • Connect and use an exhaust-free oxygen analyzer.
  • Explain the effect of the Methane number of the engine timing and performance.
  • Successfully complete a written exam with a passing grade of 80%.

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