On my 1999 H410 sailboat, I have a Northern Light 6.5Kw diesel generator
(model M673) installed. I use it to charge the batteries
or to power the ACs at anchor
Since we did mainly work
on the boat
over the last two years, we hardly ever had the chance to use it. So the generator
did only run for a couple of minutes, when rinsing the cooling
circuit with fresh water
The unit is installed deep in the aft locker. With the noise insulation
around it, it is almost inaccessible, which is another issue, I'll address. The noise insulation
panel are designed in a way, that the water
intake line, power lines and the exhaust
are running through the front element, which does not allow to remove the front panel (see picture). I do have another very limited access from the top, through the locker in the cockpit
Now when firing the unit up, it generates approximately 7VAC instead of the expected 115VAC only. The volts are read at the main panel.
I tried to put some and heavy load on it (the two ACs, the 60amp battery charger
etc.) without success. Then I played with the power switch, changing from shore to onboard power etc. No success. I also had a marine
electrician aboard, and we made our way to the generators electrical control box
. We also could only measure 7volts directly at the generator's control box
. So I discarded the idea, that the cables
from the unit to the panel could be the cause of the issue.
As the next step, I'll change the setup of the noise insulation. But this will only help to improve the accessibility of the unit, not to resolve the problem.
I asked the boat
yard and they immediately recommend me to pull the whole unit and have it inspected and serviced. As a budgetary estimate, they talked about $3'000.- to $4'000.-, creating a huge hole in the pocket....
One year ago, the engine
was spiting out cooling
fluid through the expansion bucket. It made a huge mess... It is possible, that some water sprayed over the generator unit. It turned out, that the heat exchanger
end cap (a rubber bellow) was misplaced and caused water from the primary circuit to enter the secondary circuit. We did reposition the end cap, flushed the engine
several times and filled up with new coolant
Maybe it is a simple common issue, with these units, allowing for an easy fix. Right now, I'm far away from the boat. But I'll be there in October, trying to resolve the problem.
Any suggestions / experiences, which could help me identifying the cause of the problem?
All help is much appreciated.