Hi, <br /><br />I have a problem with my Mercury Outboard 90hp 1990 model Sn B-240451 3 Cyl.<br />My boat sank some time back, got it out serviced and repaired. <br />I have it running but the problem as follows :<br />Starts well, idles well, when I rev up runs great but after about a minute of running at full throttle it starts loosing power, after that I can only idle. If I leave it for a day it happens all over again.<br />Checked the following :<br />All 3 carbs have fuel, even right after the problem happens.<br />Spark plugs new.<br />Someone told me that it could be an oil problem, but beeper does not sound.<br /><br />Any ideas anyone