I have a 1998 40 horse Evinrude. The fuel/oil pump went out and I had a shade tree mechanic put in a regular fuel pump and disconnect the oil line. he couldn't figure out how to disconnect the oil warning beep that comes on when you start the engine. I need to know how to disconnect the beep. Anybody have instructions? By the way I would like to preserve the overheat warning beep. Thanks in advance for your help.