Honda BF20A-BF25A, BF25D-BF30D Outboard Motors Shop Manual., Page 248Get this manual
Long Tiller Handle Type NOTE: No problem if the oil pressure indicator light goes off when the engine speed is slowed down suddenly but comes on after idling for or minutes
Stop the engine and check the oil levelCorrect level
Low level
Add the oil to the specified levelStart the engine and check the oil pressure indicator with the engine idlingDoes the oil pressure indicator comes
System is OK (Temporary alert was removed)
pressure switchDoes the oil pressure indicator come on? Yes