Usage:
After the engine starts, and at frequent intervals while the engine is operating, observe the gauges for proper readings.
FUEL
Indicates the level of fuel in the tank. Electrically operated, it registers only when the key switch is ON.
AMMETER
Indicates the rate of battery charge or discharge.
TACHOMETER
Indicates engine RPM. The engine can be operated between rated speed and high idle without damage, but should not be allowed to overspeed (such as when going downhill).
OIL PRESSURE
Registers between 55 and 80 PSI (50 PSI minimum) when the engine is running at rated speed with oil (SAE 30 or SAE 10W-30) at operating temperature. A lower pressure is normal at lower idling speeds. If no pressure is indicated, stop engine immediately. (Cold oil may have a higher oil pressure reading.)
WATER TEMPERATURE
Normally registers between 165° and 195°F (77° and 90°C). Somewhat higher temperatures may be experienced under certain conditions. Maximum allowable temperature, 210°F (99°C).