Honda BF35A-BF45A Outboard Motors Shop Manual., Page 91Get this manual
HONDA BF3SA045A
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)
14) Remove the pressure switch screw and disconnect the oil pressure switch wire and the thermo switch wire
1 111 THERMO
SWITCH WIRE
15) Remove the two 12 mm flange bolts and disconnect the ground cables of the ignition coil and the power trimtilt switch(Power trimtilt type only)