Operation; Checking Instruments - Volvo Penta 3.0GS/SX Owner's Manual

All shifting between forward/reverse must be done at engine idle speed. Shifting at higher speeds may damage
the drive/reverse gear and will also be uncomfortable for those on board. If the boat has two or three engines, it
is important that they are all running during maneuvers astern (rearward movement), otherwise water might get
into the exhaust of the engine which is not running when the backwash catches up with the boat. Water getting
into the engine can cause serious damage.

Checking instruments

Check instruments regularly. Stop the engine if there
is an abnormal reading or if an alarm (accessory)
sounds. The following normal readings apply:
Oil pressure
Normal operating oil pressure is approx. 150 - 500
kPa (21-71 psi). At engine idle this is normally lower.
Your boat may be equipped with a low oil pressure
acoustic alarm and warning lamp (accessory).
IMPORTANT! If oil pressure is too low: Stop the
engine immediately and investigate.
Engine coolant temperature
The temperature gauge should read between 70 -
90°C (158 - 194°F) normally. Your boat may be
equipped with an engine coolant temperature acous-
tic alarm and warning lamp (accessory).
IMPORTANT! If engine coolant temperature is
too high: Idle the engine, shift to reverse and
then to forward. Idle the engine for 2 - 3 minutes
and shut off the engine if the temperature does
not sink. Investigate and correct the malfunc-
tion.
Charge
The operating charge is approx. 14 V. When the eng-
ine is stopped battery voltage is approx. 12 V.

Operation

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