8 INSTRUMENTS, CONTROLS, EQUIPMENT
Normal Range: 12-14 V Problem Range: below 9 V
A temporary drop in charging system voltage is normal
during starting. If the voltmeter consistently shows less than 9V, contact your Grumman
Oil Pressure Gauge
Normal Range: 30-90 psi 210-620 kPa
Danger Zone: below 20 psi 140 kPa
This gauge does not show oil level. If the dipstick shows an adequate oil level when the pressure is low, do not restart engine; contact your Grumman Olson dealer or qualified workshop.
Engine Water Temperature
Normal Range: 180-210°F 62-99°C
Danger Zone: 250-280°F 120-140°C
The needle in the water temperature gauge will indicate the temperature of the coolant shortly after the ignition is switched on.
Engine operating temperature will vary with climate, traffic conditions and engine load. Maintain moderate speed until the engine has warmed up.