A couple of years ago I fried an alternator by switching from the starter to the house batteries while the engine was running, even though I went thru "both". Before replacing the switch which could be faulty, I, since then, start the engine with the switch set on "both". It has worked well for me so far.
Now that I've retired and will anchor for longer periods (on house battery only) I'm wondering; if the house batteries are too low, placing the switch on "both" position will level the power between the house and starter batteries before I get the engine running? and therefore leaving me without enough power to start the engine.
For the record; I have two 6V = 12V for house and one 12V for starter. It's obvious that electrical is foreign to me, so please KISS.
Tank you for any feedback.
SV Strudel, Niagara 31
Not all who wander are lost.