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CHAPTER 3
Typical Catalyst Engine Mil Gauge
Shown is a typical dash mounted
engine emission status panel (mil
gauge) used with catalyst engines. It
provides a visual and audible (beeping
alarm) means of monitoring engine
and emission control systems. The
panel will show the outline of an
engine on the left side and a warning
sign on the right.
When an emissions related fault is detected an amber colored light will
appear on the left side.
When an engine related malfunction is detected the warning sign will
light amber on the right side. If the situation is serious enough there
may be a signifi cant power reduction of the engine.
If either of the above lights is lighted an audible short beep alarm will
be activated.
When the engine is initially started there is a series of self-checks
involving the various emission system sensors.
Read the engine manufacturer’s operation manual for more detailed
information on emission monitoring systems related to the particular
engine brand installed on your vessel.
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