Suzuki outboard motors 1988 2003 repair manual., Page 151Get this manual
IGNITION AND ELECTRICAL SYSTEMS 5-39 BATTERY VOLTAGE
Engine speed is reduced to either 2,000 or 3,000 rpm when the system detects low battery voltage which is preset by engine speed(Example: volts2,500 rpm, 9.8 volts5,500 rpm)While the caution system is activated, the buzzer will sound and the "CHECK ENGINE lamp will lightThe "REV LIMIT" lamp will also light up when the engine speed is above either 1,750 or 2,750 rpmThe system can be reset by not using any electrical equipment which consumes high electric energy such as the power tilt and trim system, hydraulic jack plate, etcand engine speed is reduced to idle for one secondTHREE-PHASE CHARGING SYSTEM