Honda BF8, BF9.9 and BF10 Outboard Motors Shop Manual., Page 29Get this manual
Oil Pressure Indicator (Green) Test REMOTE CONTROL E Stop the engine and inspect the oil levelCorrect level Low level
1Normal
Add engine oil to correct level
Start the engine and allow it to idleCheck the oil pressure indicator
Indicator ON
OK, test completeslndicator OFF
Disconnect the oil pressure switch wire (Yellow) connector and check the indicator
lndicator ON Abnormal Oil strainer clogged Oil pump faulty Oil passage cloggedOil filter cartridge clogged