Overcharging Alternator

Battery sense from the ignition switch is not to smart. A wires goes to the helm, then back the the alternator. Lots of voltage drop in those wires and as age comes on, more resistance.
Soon your alternator is screaming to get that sense level up. Then, over charges the batteries.

If you are NOT using a diode battery isolation, wire the sense rite to the battery out put.

If you are using diode battery isolation, wire the sense to the starter battery side of the isolation diode.

If you feel you must turn the sense off by key switch, Wire in a relay as I have done on my boat. Connects battery to the sense lead, controlled by the key switch.
PM me if a diagram is needed.

Where does the alternator B+ lead go?
Straight the the battery post on the starter?
Straight to the battery?

Or, to some weird looking gizmo with similar sized wire/cabled connected to it.

The whole SI install instructions, bottom of page 2, shows a strap from battery sense to B+.
4" wire.
This loads the PDF pages.

https://www.delcoremy.com/documents...ions-for-35si-hp-36si-hp-replacing-delco.aspx

Some engineer wanted to make an extra penny.
Some other folk thought it was better not to store an engine with a hot lead on the engine.
I have no solid good answer. But it does mess things up at times.

Question; Series 60 at 12Volt, not 24V??

Trying to use the computer on our boat. MigraineSoft has made obsolete another one of my scanner/printers.
Unable to scan and send a diagram till I get back to the compound.

I use standard Bosch type relays for 12 & 24V projects.
Install the relay between the B+ and sense post. Key-switch and ground will enable the relay.
Pretty easy to hook up if needed.

No new text. Please try again.

Is this a new boat to you?
What two banks are solenoid paralleled together to start?
House and that engine batt? The other engine bank?
Or like some other mfg's,, 2 x 12v batts twisted by a fancy solenoid to make 24V at the starter?

Oh heck, I looked at the top.. It's an Ocean Mfg.
They did the twisted solenoid thing for the 24v starters on some rigs.
And, Ocean did use diode idolators on some other rigs.

Do you have the ships electrical prints?
I'm hoping some other Ocean Yacht members can chime in and help also on this.

Massachusetts?? Sheet, to far aweigh,,, Rats..
Why are the good bugs always to far aweigh??

I think it is weird but I do understand it.
Your two G31 batteries are for starting and the house.
For starting, the batts are tied in parallel to provide the current required to turn the engine over.
Each engines alternator charges its one battery.

Any one battery or alternator, failure will probably ruin your day.

Have you considered more batteries and an auto charging relay (ACR)?


I'm sorry, I digressed.
You alternator bolted back on yet?

If you don't have an air impact gun, going to be fun. Some shaft ends have an Allen socket in the end. Use that and a offset box wrench. Or just take it to a shop or garage and have them zip in tight for you.

Got a funny for ya; Were back on our own dock. The power is down for there area.
Were tied up and still on our big gen-set.
Were ice cool and the neighbors are on their porches because it's to hot to go inside.
I got to rub it in. HA

Lights and power restored on land. Were staying on the boat another night, just a short walk from our house.
Kats know were home. But we can't let them out tonight.

You plugged in and water skiing yet?