Honda Outboards BF40A/BF50A Service Manual, Page 292Get this manual
BF40A-BF50A Remote Control Type:
Warning buzzer sounds continuously
1Stop the engine and check the indicator lights
Oil pressure indicator
Oil pressure indicator
Overheat indicator light
Overheat indicator ON
light OFF
light ON
OFFGo to P2-12
Check the CDI unit(P16-1)'
Stop the engine and check the oil levelIs the oil level correct? YES
NO-Fill to the proper level and recheck3Start the engine and check the oil ; YES pressure light with the engine idlingDoes the oil pressure light come ON and buzzer stop?
System is OK (oil level was low)
If Buzzer stops but oil pressure
indicator light does not come ONNO
Oil pressure indicator light ON but buzzer does not stop
Check the indicator light (see base shop manual)