Question: what are the materials used in the major parts of generator engine?
Answer: Engine. The engine is the workhorse of the generator. ... 
Alternator/Generator End. The alternator of the generator is what turns the mechanical energy into electricity. ... 
Fuel System. ... 
Control Panel. ... 
Battery Charger. ... 
Voltage Regulator. ... 
Main Frame/Skid. ... 
Lubrication System.