2009-2010 Suzuki DF70A DF80A DF90A Outboard Service Manual, Page 277Get this manual
Power Trim and Tilt:
Setting of Trim Down Position Limit
Once the ECM has been replaced or the trim sensor removed and reinstalled, the resetting of the trim lower position limit should be performedPerform this set-up after the current position setting has been cancelled, as explained in the following procedures
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5) Press the "DOWN" side of the PTT switch for three seconds and the buzzer will sound two times briefly indicating the setting has been canceledCanceling Trim Down Position Limit Setting 1) Turn the ignition key to the "ON" position2) Pull out the emergency stop switch lock plate3) Make sure that remote control handle is in "Neutral"(Check that the neutral switch is in the "ON" position