Re: 4 warning beeps on my 2005 200 merc optimax every 10 min. what does it mean pls h
Have a 200 hp 2005 mercury optimax saltwater series. About every 10 min 4 beeps sound. oil reserve is full, temp fine,fuel is a little less than 1/4 never heard before! can somone please help!! thank you!
I have this now on my 2003 M2 Optimax 200. It can be either too much water in the fuel water separator or an onboard oil tank issue. When the key is turned to the on position w/motor off the oil light goes on followed shortly by the four beeps. Onboard and reserve oil tanks full, no air in onboard tank, good pressure etc. So it was a bit confusing to me.
Using a magnet I isolated the fault to a bad oil tank low oil sensor and/or oil tank float. The low oil sensor is on top of the on board oil tank and the wiring on the top of the tank goes into it. It can be pulled out by removing the SS screw and washer next to it which hold it down. The sensor sits in a sealed shaft and receives magnetism from the floats magnet in the oil.
I removed the low oil sensor from the top of the on board oil tank and held a magnet to the sensor rod with the engine keyed on. The oil light went out. However I noticed that in moving the magnet up and down the sensor the light would go on when the magnet was moved to the bottom half of the sensor. Moving the magnet to the top half of the sensor turned the light off. So, bad sensor as it only operated in half its range.
I've ordered both a new sensor ($30) and oil tank ($100) since the tank magnet could be bad too.
http://www.offshoremarineparts.com/856156/prod_9206.html
The good thing about replacing the sensor is I'll be able to SPLICE IN the new sensor and add length to the sensor wire! The wiring in my engine was too tight to even pull the sensor unless the right angle is found. I plan to add a foot or more to the wiring with the new sensor so I can remove the the sensor in the future from directly above. Apparently these sensors are a common fault.
-Good luck.
