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Operation
Engine Protection Mode
In a low oil pressure, low voltage, engine overheat, or
lack of exhaust cooling water situation, the Electronic
Fuel Injection (EFI) system enters an Engine Protection
Mode and the acoustic 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 temperature 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
“master“ engine and the other will be the “slave“ engine.
If one engine has a fault that causes it to go into Engine
Protection 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 ex-
pected. 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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