1994 Johnson Evinrude "ER" 60 LV 150, 150C, 175 Service Manual, P/N 500611, Page 67Get this manual
Warning Signals Push fuel hose off fuel fittingsdon't pullIf pushing won't separate hose and fitting, carefully cut the hose along its side and peel it back to avoid damaging the fittings
"low" Oil Signal
A 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 pump oil inlet itting3Start the engine and run it at 1000 RPM, in gear4After the residual oil is exhausted from the pump, theno oil" circuit should activate the warning horn The horn should sound second on, '2 second off2 5If the horn does not sound within ten minutes, check for battery voltage at purple lead, connector terminal "0", when engine is running, and check the tachometer circuitRefer to RectifierRegulator Tests, Section 76If battery voltage is present at the pump, the tachometer circuit is okay, and the warning horn circuit is okayreplace the pumpWhen testing is complete, be sure all oil hose connections are airtight to avoid possible powerhead damageTheIow oil" and "no oil" signals alert the operator to possible system problemsTo prevent possible serious powerhead damage, you must be sure these signals are working