Alternator questions

[Charlie]

Originally Posted by Wotname

Quite possible, the B- stud sort of looks insulated from the alternator frame but is hard to tell from the photo; perhaps the OP can confirm?

If so, then wiring size to the B- becomes a consideration for the OP to think about.

I believe that the B- stud is for a negative wire. In my situation the alternator is grounded to the engine.

[Charlie]

Originally Posted by stormalong

The Iskra is what comes to Beta on the Kubota engines. It is not intended to charge a house bank. It is intended to put the power back into the battery that started the engine and maybe power a few lights. Remember that the Kubota started as a small tractor engine before it was marinized.

Beta has a second alternator bracket available. I had one fitted when I bought my 50HP BV2203. That is the most practical way to charge a house battery. Don't think of the Iskra is anything more than a very light duty alternator. Any attempt to drive it at 65 amp output for more than a few minutes will burn it up.

My house bank is small enough that I do not need anything more than the Iskra. My only load is lights, water pump, radio, and VHF.

[Wotname]

Originally Posted by Charlie

I believe that the B- stud is for a negative wire. In my situation the alternator is grounded to the engine.

Yes the B- stud is for a negative wire should one wish to fit one.

I can't tell from the photo but are both of those larger spade terminals designated as B+??

Initially I thought I could see one as B+ and the other as B- but on a second look, it seems they are both B+.

[Charlie]

Both are B+. The plastic surrounding the spade terminals was melted. I decided to get larger cables and to attach to the stud.

[Wotname]

^^ Thanks.
I'm sure you will be happy with the result

[Charlie]

Originally Posted by Wotname

^^ Thanks.
I'm sure you will be happy with the result

@wotname I think so. I only have a few more days on the boat this year but next year I will replace my two house bank batteries. I might also get solar panels.