Suzuki 2003-2007 DF60 DF70 Outboard Motors Service Manual, Page 79Get this manual
ENGINE CONTROL SYSTEM
OPERATING HOUR INDICATION SYSTEM (For remote control model)
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, using combination of the tachometer needle and "REV-LIMIT" lamp flashingNOTE: The total operating hours displayed are those of actual engine operation, not ignition switch "ON" timeMONITOR-TACHOMETER