I have a 7.0BCG Westerbeke.
Mine is 6 yrs old, with 650 hours (I personally put 200 on it since
last November, when I bought the boat.)

Last week, it ran down in rpms a couple of times, and then died. All
efforts to restart have failed. I was low on fuel in the supply tank,
and figured that was the problem.

I have checked all safety systems, lifted the overspeed module
connection, and as long as I hold both the start switch AND the oil
pressure override switch down, it sounds like it has started and is
running. I am perhaps fooling myself because I'm sure the starter is
engaged while I'm holding down the start switch.

If I release either, the engine dies, like you hit the stop switch. I
have measured a good 12v on the fuel cutoff solenoid, even when the
switches are released. I have cracked the solenoid from the carb
housing, and have fuel running out, so I "don't" think I have a fuel
pump problem.

I am not developing A/C voltage, though. IT's like 10 volts on the
panel meter, or something trivial during the start.

Would the lack of the battery charger output from the A/C side be
causing this symptom?

Any other ideas?