My 99 Merc 90 had been sitting up a few months so I decided to run the engine with the water flush attachment. (Something I have done many times). It started fine and after a few minutes I revved the engine in quick pulses to around 3k and back to idle. Suddenly the warning alarm went off on a steady whine. I know it was getting oil b/c the oil resevoir was full and I was getting good white smoke in the exhaust. I checked the water coming from the pee hole and it was still cool. I shut down and tried to start it again in an hour, and as soon as I turn the key, the warning alarm goes off on a steady whine again. I tried again a week later and it still goes off as soon as I turn the key. Anyone have an idea what is wrong and how I can fix it.<br /><br />Thanks in advance,<br /><br />Scott