1996-2005 Suzuki DF40, DF50 Four Stroke Outboard Service Manual, Page 85Get this manual

1996-2005 Suzuki DF40, DF50 Four Stroke Outboard Service Manual, Page 85

ENGINE CONTROL SYSTEM 3-30
OPERATING HOUR INDICATION SYSTEM
When the ignition switch is initially turned "ON" (from "OFF"), the ECM tests the caution system by turning on all four lamps in the monitor-tachometer and sounding the caution buzzer for an initial two secondsFor the next three seconds, the ECM indicates the total operating hours, in units of 50 hours, using combination of the tachometer needle and three lamps (except for "CHECK ENGINE" lamp)
MONITOR-TACHOMETER