Honda BF115A, BF130A Outboard Motors Shop Manual., Page 386Get this manual
Oil alert system
When the oil pressure switch mounted on the cylinder block detects low oil pressure, the signal is transmitted to the ECM to alert the conditionThe green oil pressure light turns OFF and the warning buzzer emits the continuous sound this time, then the engine speed drops to 1,800 min-' (rpmlThe engine returns to the normal speed gradually when the problem is corrected