1990 Johnson Evinrude "ES" 40 thru 55, P/N 507872, Page 87Get this manual
Warning Signals
f'N=J Avoid pulling "E.S1763" fuel line off fuel fittingsPush off wherever possibleWhen removing "E.S1763" fuel line from fittings, carefully cut the hose to avoid damaging the fittings
"Low Oil" Signal complete procedure for testing the "low oil" circuit can Installation Recommendations, this sectionbe found in "No Oil" Signal 1Connect shop tank with 50: fueloil mixture to the fuel inlet fitting2Carefully cut the oil supply hose from the to avoid damaging the fitting3Start the engine and run at 1000 RPM in gear4After the residual oil is exhausted from the oil pump, the fIno oil" circuit should activate the control box warning horn5The Signal should be approximately 12 second on, 12 second off6If the horn does not sound within five minutes, check the Amphenol connectors and the tachometer circuit Check the boat's tachometer or temporarily attach known good tachometer to test the tachometer circuit On tiller models, check for battery voltage at purple lead, connector terminal "D," when engine is running7If the tachometer circuit and the warning horn circuit are okay, replace the pumpWhen testing is complete, be sure all oil hose connections are airtight to avoid possible powerhead damageThe "Iow oil" and fIno oil" signals alert the operator to possible problemsTo prevent possible serious powerhead damage, you must be sure these signals are workingoil inlet fitting