Technician A says that an air-fuel mixture that is too lean can cause burned internal engine parts. Technician B says an overly rich mixture can cause oil wash from cylinder walls. Which technician is correct?
A)Technician A
B)Technician B
C)Both technicians
D)Neither technician

Question

Quizplus · Accepted Answer

Both technicians are correct. A lean mixture can cause higher temperatures in the combustion chamber, leading to burnt internal engine parts. Conversely, if the mixture is too rich, unburned fuel can wash away the oil film on the cylinder walls, leading to increased engine wear.

Technician a Says That an Air-Fuel Mixture That Is Too