NW Explorations
AQUILA OPERATING MANUAL
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4J4:
Engine Operating Parameters
The following parameters are estimated based upon the Cummins QSL9 operating parameters from the
manufacturer.
RPM
Speed
Fuel Consumption
Naut. Miles/Gallon
1200
5.5 Knots
2.2 GPH
2.5
1400
7.0
2.9 GPH
2.4
1600
8.5
4.0 GPH
2.13
1800
10.0
5.5 GPH
1.82
2200
11.0
9.0 GPH
.82
2400
11.5
15.0 GPH
.77
4J5: Engine Transmissions
Check the Transmission Oil Level
Check the oil level once every two weeks, more often if a
transmission shifts erratically, with the dipstick on the starboard
side of the transmission. It is unlikely that any oil will need to be
added. Be sure to check under the transmission for leaks! Low
transmission oil is a serious matter.
With the engine idling, remove the transmission dipstick. Wipe
it with a towel, reinsert it, and take a reading. If the level is
below the add mark, stop the engine, add a pint of the same oil
used for the engine crankcases through the plug in the top of
the transmission case, and then start the engine and measure
again. Do not overfill, for to do so could cause the seals to “blow
out”.
The transmission is fitted with an oil cooler. Be sure to service the zincs on the cooler when the engine’s zincs
are service.
The dipstick and fill plug are clearly visible
in this photo of the port transmission.