jeff wrote:

Rosalie B. wrote:
...
We were motor sailing along, as the breeze basically died (although it
was from the predicted direction), and I was in the aft cabin when
suddenly it sounded to me as if the engine was running away.
...

Was it an exhaust type sound, which could be an exhaust leak or header
problem, or a mechanical sound, like a water pump or even alternator
bearing? Was there a vibration with it? As the Car Talk guys would
say, "Can you make the sound for us?"

I thought it sounded like a racing engine as if the transmission had
gone wild. Yes there was vibration.

Bob (after he got over the idea that it was a big boat following us)
said it was a lot of vibration which you could hear better in the aft
cabin. He thinks it is the cutlass bearing that is shot, which will
require that we haul the boat to check and if that is it to replace
it. He will have to take off the prop which will be a pain as it is a
MaxProp