Yesterday, I was motoring and noticed that the engine tachometer was acting strangely. It would read 4000 rpm for a while and then drop back to 2000 rpm (roughly correct). Then it would go up to 3000 rpm and hold there. It kept bouncing around while the actual engine was steady, so it was just the tach. I have no idea where the data comes from, what would cause this, and whether to worry about it. The engine is a Universal M4-30. Thanks- Dave
S/V Aries 1990 C&C 34+ New London, CT
