Honda BF75D Owner's Manual page 71

Trolling Speed Control
(optional equipment)
SWITCH PANEL
TRL (Trolling) CONTROL SWITCH
DN: Reduce engine speed 
UP: Increase engine speed
Place the outboard motor in-gear with
the throttle control in the fully closed
(idle) position. Press and hold the UP
or DN side of the TRL control switch
to activate the Trolling Speed
Control. The buzzer will make one
long sound indicating activation.
The initial trolling speed is set at 650
rpm.
The engine speed can be adjusted in
50 rpm increments by pressing the
UP or DN side of the TRL control
switch. A short sound of the buzzer
occurs each time the engine speed is
adjusted.
In Trolling Speed Control mode, the
engine speed can be adjusted between
650 and 1,000 rpm.
Continuing to press the switch when
at either of these limits will result in
two short sounds from the buzzer.
The throttle control will operate when
in the Trolling Speed Control mode,
but once the speed reaches 3,000 rpm,
OPERATION
the Trolling Speed Control is
deactivated. If 3,000 rpm is not
reached and the throttle is closed, the
engine speed will decrease to the
Trolling Speed Control setting.
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