1995 Johnson/Evinrude Outboards 25, 35 3-Cylinder Service Manual, Page 30Get this manual
Warning System A warning horn is built into the ONIC prewired remote control or is part of the ONIC accessory wiring harnessThis feature alerts the operator to several critical operating conditionsDepending on the engine model, the conditions might be: Overheatcontinuous tone No Oilcontinuous tone "Low Oil Level" light mounted on the engine, is used on all models to warn the operator of low oil condition in the oil tank
INote To avoid possible powerhead damage, be sure the warning horn is in operating conditionIt is advisable to check the horn at the start of each boating season and periodically during the seasonTest Temperature Horn
1Disconnect bullet connector at temperature switch