FNM HPEP 225 Installation Manual page 14

COMPARTMENT TEMPERATURE - SPECIFICATIONS
Too high an inlet air temperature lowers the engine performance. Therefore:
Engine compartment temperature shall not exceed outside air temperature by more than
17 degrees C (30 degrees F).
Since many factors influence engine compartment temperature, temperature
measurements should always be carried out.
COMPARTMENT TEMPERATURE -TESTING
Observe the following:
•
•
•
1. Engine Running and Heat Soak Test:
IMPORTANT: If the temperature at the engine air inlet (air filter) exceeds
specifications, the engine compartment will need additional engine combustion air
openings, or an increase in engine compartment ventilation area, until the
temperature remains within specification.
The boat being tested shall be a standard production boat fitted as it would be for
delivery to a dealer.
Temperature test meter used shall be of the type that can be read without opening the
engine cover.
During the test, in Step 1., engine compartments are to remain closed. No outside air
is to be forced into the engine compartment during the test and the bilge blower should
not be running.
a. Use 1 meter and 1 thermo couple. Position the thermo couple at the engine air inlet
(air filter).
b. Start engine to warm it up. After engine is at its normal operating temperature, run
engine at WOT for 20 minutes. Record temperature readings at 5 minute intervals.
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