Volvo Penta TAMD74A, Operator'S Manual

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23
Operation
Accessories
Trolling valve
Certain Twin Disc reverse gears can be fitted with a trolling
valve so that the lowest speed of the boat can be variably
reduced by 1– 80% at engine speeds up to 1100 rpm.
IMPORTANT! Risk of overheating the reverse gear if
the trolling valve is used at higher engine speeds than
1100 rpm.
Manoeuvring
Disengage the reverse gear and set the trolling valve for
maximum slip. Engage “Forward” or “Reverse” and set the
desired slip position within the permitted engine speed
range.
In order to attain full propeller output, the trolling valve
lever must always be in “disengaged” position when not
being used.
Flush and bilge pump
The bilge pump has a vacuum switch (1) that automatically
disengages the pump when water is no longer being drawn
into the pump.
The scavenging and bilge pump is engaged and disen-
gaged from a switch that is normally located at the main
control position. The bilge pump can also be engaged
manually by holding down the lever 2 for about 20 sec-
onds.