Originally posted by JBear:<br /> Bill,<br /><br />I just went through what you are going through. In my case the beeping was caused by a disconnected ground wire on the back of the motor. However, I went through a lot of diagnosis of the sensors, and pump before I found it. The wire was still in the connector sleeve so I didn't notice it at first. To answer your questions about the cap sensor, you can use a multi testor to check it out. Diconnect the blue wire and black wire, switch the tester to the conntinuity check position (your testor manual will show you how) and connect the negative lead to the black wire and the postive lead to the blue wire. The testor needle should go all the way over to the right with the float down and fall back to the left when the float is up. If it does that then the cap sensor is okay. If not you need a new cap assembly. The float should always be up in the engine reservoir to indicate to the warning system that there is full oil in the reservoir. Make sure the float is good, as well, and not saturated with oil which would keep it in the down position even with oil in the reservoir. You could also check the motion sensor which should be located just behind the oil pump. Your owners manual should have a section that decribes how to trouble shoot problems with a low oil warning. It also tells you how to bleed the oil injection system if you need too. You can go to the web site
http://www.mercruiserparts.com to find parts, and diagrams of all engine components. They have online copies of the microfiche that service shops use to locate and identify parts for a wide range of outboards.<br />Hope this helps.