1994 Johnson/Evinrude Outboards 40 thru 55 Service Manual, Page 36Get this manual
Warning Horn A warning horn is built into the OMC prewired remote control or is part of the OMC accessory wiring harnessThis feature alerts the operator to several critical operating conditionsDepending on the engine model, the conditions might be:
Overheatcontinuous tone No Oilcontinuous short pulses Low Oilshort pulse every 40 seconds Test
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 season