1996 Johnson Evinrude "ED" 40 thru 55 2-Cylinder Service Manual, P/N 507124, Page 124Get this manual
DR4137 DR4138
S.L.O.Warning System
This ignition system incorporates the S.L.DWTM warning system, which gradually limits engine speed to approximately 2500 RPM when engine temperature exceeds 240 (116 C)To resume normal operation after the S.L.DWwarning system has activated: Amp ModelsAllow the engine to cool to 20r (97 C) and the engine must be brought to an idle 12 Amp ModelsAllow the engine to cool to 20r (97 C) and turn it offThe S.LOWwarning system depends on input from the temperature switch tanblue leadFunctional Test 1Disconnect temperature switch tanblue lead2Install correct test propellerStart engine in test tank and run at 3500 RPM3Attach the engine harness tan lead to clean engine ground: Engine must slow to approximately 2500 RPM4Stop the engineIf engine speed reduced in Step 3, test the temperature switchRefer to Temperature Switch Test, Section If engine speed did not reduce in Step 3: Amp ModelsCheck wiring or replace power pack12 Amp ModelsGo to Step 55Separate 5-pin Amphenol connector between the stator assembly and power pack