Volvo Penta 5.7 Gil-B, Operator'S Manual

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Operation
Engine Protection Mode
In a low oil pressure or engine overheat situation, the EFI
system enters an Engine Protection Mode and the acous-
tic alarm will sound. In these situations, normal engine
operation is limited to 2500 to 2700 RPM or less. Above
2500 to 2700 RPM the engine will exhibit poor running
characteristics. Use the oil pressure and water tempera-
ture gauges to verify a problem exists, then check the
engine crankcase for proper oil level and the water inlets
for obstructions. The low oil pressure/engine overheat
problem must be corrected before the engine will return to
normal operation.
To reset the Engine Protection Mode after the problem is
corrected, allow the engine to cool and then continue with
normal operation.
NOTE: Should the problem continue, contact your nearest
Volvo Penta dealer and have the engine checked.
Master/Slave Installation
For twin unit installations both engine ECMs can be tied
together electronically. One engine will then be the “mas-
ter“ engine and the other will be the “slave“ engine. The
starboard engine or the engine with the power steering
pump is always connected as the “master“ engine. If one
engine has a fault that causes it to go into Engine Protec-
tion Mode (low oil pressure or engine overheat) the other
engine will also go into Engine Protection Mode.
High Altitude Operation
The engine is equipped with sensors to compensate for
the decrease in air density. However, a performance loss
at altitudes above 1600 m (5000 ft.) can be expected. If
you are boating above 1600 m (5000 ft.) altitude for a short
time, a lower pitch propeller will restore some of the lost
performance.
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