1996-2005 Suzuki DF40, DF50 Four Stroke Outboard Service Manual, Page 366Get this manual
DF40DF50 "K1" (01) model 13-30
OPERATING HOUR INDICATION SYSTEM
(For remote control model)
After 2-seconds indicator check, monitor-tachometer will indicate the total motor operating hours by means of the "REV-LIMIT" lamp flashing and needle indicating as shown on the chart below
NOTE: The total operating hours displayed are those of actual engine operation, not ignition switch "ON" time