Honda Outboards BF40A/BF50A Service Manual, Page 207Get this manual
HONDABF3SA45A REMOTE CHOKE SOLENOID (Remote control type only)
Measure the resistance between the terminals
Resistance
OIL PRESSURE SWITCH
1) Remove the oil pressure switch wire2) Attach the tester leads to the terminal joint and switch body and check for continuityThere should be continuity[1]
4x8mm SCREW
PULSER COIL
NOTE It is not nec'essary to remove the coil: Remove the engine cover and disconnect the pulser coil connector from the right side of the engine (P6-3)