Monday running back to ramp a solid alarm went off for about 5 seconds. I was running about 5000 rpm. I slowed down, made sure it was peeing and took off again. Alarm didn't go back off. I googled as much as I could and kept getting oil issue. Main oil tank is over half full, reservoir is full. I took it out yesterday and the alarm went off seconds after cranking at idle. I ran it and alarm never went off after getting on plane. I cranked it twice more and seconds after running at idle solid alarm and then nothing after takeoff. Put it back on trailer went home. I have no problem taking it to mechanic. Issue is I don't have one close and it's a 2 week wait. Friend of mine has a 2017 250 mercury and has had trash get in his thermostat twice this year. He took out the thermostat and cleaned the trash out. Has anyone else had this issue?