I've just read that when Cassini makes its first close pass of Saturn's F-ring on December 4, it will be the 183rd engine burn which sounds like a lot for orbital maneuvers using a spacecraft's main engine.
This is not only excellent engine reliability, it's great from an orbital maneuver perspective as well. Each maneuver requires careful measurements, calculation, simulation, generation of instruction sets, execution, and follow-up measurements. That's a lot of work for the humans!
So has Cassini's long series of orbit maneuvers using repeated restarts of the main engine some kind of record for the engine?
In the New York Times article How Cassini Will Begin Its Date With Death on Saturn there is a cool 3D rotating GIF of the orbit.