1995 Johnson/Evinrude Outboards 9.9, 15 four-stroke Service Manual, Page 28Get this manual
Warning Horn A warning horn is built into the OMC prewired remote control or is part of the OMC accessory wiring harnessThe warning horn signal, continuous tone, is the same for an engine overheat or low oil crankcase pressureThis feature, along with 5.L.0W TM warning system, alerts the operator when the crankcase oil pressure drops dangerously low, or in the event of an engine overheat (remote start models)Test Each time the key switch is turned from OFF to ON, the horn will beep once as self-testIf not proceed as follows1Disconnect bullet connector at temperature switch