Be sure the gauges are in good working order.
You can determine what is "normal" operating range by
observing and recording the gauge
readings over a period of time. The cause of any
sudden or significant change in the readings should be
determined and corrected.
Indicates the level of fuel in the tank. Electrically
operated, it registers only when the key switch is ON.
Indicator should register in the NORMAL (green) range.
When the filter element becomes clogged, the indicator
moves to the OUT (red) position.
Wash the primary fuel filter and replace the secondary
fuel filter element.
Indicates the rate of battery charge or discharge
Indicates engine RPM.