Mercury 135 Verado Manual page 62

Engine auto synchronization will automatically engage when
engine speed is over 900 RPM for two seconds and remote control
handles are positioned within 10% of each other. The "SYNC" light
will turn on when the engines are synchronized. Auto
synchronization will stay engaged up to 95% throttle opening. To
disengage, move one or both control handles until they are more
than 10% apart, reduce engine speed below 900 RPM, or increase
engine speed beyond 95%.
HELM TRANSFER
Avoid serious injury or death from loss of boat control. The boat
operator should never leave the active station while engine is in
gear. Helm transfer should only be attempted while both stations
are manned. One person helm transfer should only be performed
while engine is in neutral.
NOTE: Idle position is preferred when doing a helm transfer. If
conditions do not allow the remote control to be placed at idle
position, a helm transfer can be done while in gear.
NOTE: The active light on the remote control will be illuminated at
the helm that is in control of the engine.
The helm transfer function allows the boat operator to select which
helm is in control of engine operation. Pressing the throttle only/
station select button two times allows engine control to be
transferred to a new helm. When a helm transfer is initiated, the
control will automatically start adjusting engine RPM and gear
position to match the control handle setting at the new helm. Adjust
the control handles to the desired throttle and gear position.
NOTE: There is a 10 second time frame to complete a helm
transfer. If the helm transfer is not completed, the action will be
cancelled and a double beep will sound. Pressing the throttle only/
station select button again will re-initiate a helm transfer.
FEATURES AND CONTROLS
ACTIVE
STAT ION SELECT
!
SYNC
THROTTLE
ONLY
22969
WARNING
54