1994 Johnson/Evinrude Outboards 40 thru 55 Service Manual, Page 131Get this manual
DR4137 DR4138
Function Tests, S.L.OW- All Models
This ignition system incorporates the 5.L.0WTAl warning system, which gradually limits engine speed to approximately 2500 RPM when engine temperature exceeds 203 1950 C)To resume normal operation after the 5.L.0Wwarning system has activated:
.4 Amp ModelsAllow the engine to cool to 162 (72 C) and the engine must be slowed to an idle 12 Amp ModelsAllow the engine to cool to 1620 (72 C) and turn it offThe 5.L.0Wwarning system depends on input from the temperature switch tan leadOn electric start models, the 5.L.DWwarning system is isolated from other warning horn signals by blocking diode in the engine wiring harnessTemperature Switch 1Disconnect temperature switch tan lead2Install correct test propellerStart engine in test tank and run at 3500 RPM