Engine temperature
It
is important that inlet temperature be kept as low as
possible bearing in mind that engine performance fig-
ures apply at a test temperature of +25 °C (+77 °F).
Temperature
≤ 25 °C (77 °F) Full power
> 25 °C (77 °F) Power loss approx. 1% per 10
°C
Inlet air temperature at the air filter may not be higher
than 25
°C (77 °F) for full power to be achieved. During
sea trials the temperature in the air filter must not be
higher than 20 °C (68 °F) above the outside tempera-
ture.
Engine surface temperature is rather high at certain
points. Certain individual engine components such as
charge regulators and relays must therefore be instal-
led on bulkheads or at other locations where the tem-
perature is relatively low.
Maximum temperature at electrical component
installation locations is 70 °C (158 °F). However, the
starter motor and alternator have their given locations.
Engine compartment pressure
Volvo Penta recommends that negative pressure in the
engine compartment not fall below 0.5 kPa (0.07 psi)
at full speed. A slight negative pressure in the engine
compartment is not harmful and it prevents gases from
being forced out of the engine compartment into other
boat spaces.
Arrangement and Planning, Engine Room
47704162 10-2014 © AB VOLVO PENTA 23
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