assist you with selecting the correct propeller size or
gear ratio for your boat.
Boat Bottom
The condition of the boat’s bottom can affect your
engine’s performance. Marine growth, present in fresh
water as well as salt water, will reduce boat speed. A
boat bottom with evidence of marine growth can cause
a reduction in top speed of 20 percent or more. Peri-
odically clean the bottom of your boat following the
manufacturer’s recommendations. Bottom painting
may also be desirable.
Engine Protection Mode
In a low oil pressure or engine overheat situation, the
engine’s computer will initiate Engine Protection Mode
(EPM). If an audible alarm has been installed with your
engine, it will sound to notify you of a malfunction.
If engine conditions trigger EPM, engine RPMs may be
reduced or the engine may shut down, depending on
the severity of the problem.
Under most EPM conditions, engine operation is lim-
ited to 2500 RPMs or less. For mild engine overheat-
ing, engine speed reduction will be 3500 RPMs.
Bring the engine to idle to investigate the problem.
Use the oil pressure and temperature gauges to verify
a problem exists. Check the engine dipstick for proper
oil level. See
for temperature
issues. The low oil pressure/engine overheat problem
must be corrected before the engine will return to nor-
mal operation.
If a temperature problem caused the EPM to activate,
the engine must cool down to an acceptable tempera-
ture before the EPM is turned off.
If the audible alarm stops sounding, the malfunction
has been cleared and the engine may now be operated
normally.
If you are unable to locate and resolve the problem,
you may be able to continue operating the engine at
above idle speed, keeping in mind that the audible
alarm will continue sounding and the engine speed will
remain at a reduced level.
NOTICE!
Continuing to run the engine, with EPM
active and without correcting the cause of the problem,
may result in engine damage or equipment failure
which may not be covered by your warranty.
If the problem continues, contact your Volvo Penta
dealer and have the engine inspected.
P0018320
P0018321
Troubleshooting
58
47706149 09-2015 © AB VOLVO PENTA
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