Hi,
Can someone hit me with some knowledge???

Because all I've done over last couple of months is fix things on my boat (hatches, windows, toilets etc), I thought should run my diesel (Nanni 3.90HE) while I'm tinkering.

But when the time came to shut her down, the stop switch didn't work. Had turn off the fuel line. Google's telling me its probably the solenoid. Though I don't know much more than that.

I can add that my control box,which is out in the cockpit, was quite damp from the recent showers.

Any advice?

Thanks.