Honda Outboards BF40A/BF50A Service Manual, Page 91Get this manual
HONDA BF35A45A
13) Remove the 12 mm flange bolt and disconnect the ground cable of the trim control unit and the power tilt relay from the cylinder block(Remote control type only)
TRIM CONTROL UNITPOWER TILT RELAY GROUND CABLE
14) Remove the pressure switch screw and disconnect the oil pressure switch wire and the thermo switch wire
PRESSURE SWITCH SCREW [2] OIL PRESSURE SWITCH WIRE