charging

Hi friends. I’ve been struggling with my batt 2 charge level. 2 new interstate batteries installed in April. Boat sat in water for two weeks or so and the charge on batt 2 went way dow to where it would not start the engine. I ran her for a while and she is back up to 11.5. Batt 1 is at 12.5. I...

Hi folks, our 1990 express cruiser has the 2 454's. I'm installing a new battery isolator, on the package it states "this isolator will not with self-exciting alternators. My question is, do i have self-exciting alternators on our boat?? I put new alternators on 2 years ago. I have pics of the...

Hello everyone, I'm looking for a wiring diagram for my 1993 440 charging system. Both alternators on the boat are bad. The place that checked both alternators told me the cause was in the boats wiring. I would really appreciate it if someone knows where I can get these. Thank you

I am having an issue with the port alternator charging. If running on its own it’ll run at 13.4 volts but when I fire up the starboard engine it spikes and stays between 15.5-17 volts depending on RPM. The starboard motor never really goes over 13.4 volts. Both alternators tested good. Both...

New to me 97 sundancer 500 with 240v,120v,24v and 12v systems 7 battery's, 2 x12v =24v in series for Catapillar C12s, 2x12v in parallel for house, 1x12v for deisel westerbeke generator. 2 inverters, a 24v and a 12v. ....24v banks fine- batteries charge on shore and under way. 12v "house"charges...

I have a 2019 Sea Ray 280 SLX that I purchased new last year. When I drop anchor, turn off the boat and listen to music for several hours my battery runs down to the point where I almost don’t have the power to start the engine or raise the anchor. Is this normal? The boat has two batteries and...

Howdy, New to the forum. Just got a 1994 200 Signature and it has a single battery setup. The boat is going to be stored on a trailer at a storage facility when not in use. Would it be better to take the battery home after each use and charge? Better to just leave it on the boat and bring a...

Took my '97 SR 330 DA for a shakedown ride. Everything great for 45 min's. Slowed to idle for no-wake zone and port engine shut off. I could restart it, but the only way to keep it running was to goose throttle and keep rpm's above 1600. Cursed. Turned around. Limped on 1 screw. Restarted port...

In a recent conversation there was a (strong) opinion that you must unplug from shore power BEFORE starting the engines, otherwise the alternators are trying to charge the batteries as is the AC/DC convertor and this will damage the system. I've not heard this before. I always start the...

60 days till boating season !!! I have plugged in my 99 340 DA to charge the batteries. I plugged the boat in as if I was plugging in to shore power - the only difference is I plugged in to a regular 110v circuit. My question is - in the galley is my control panel. I have two rocker switches...

I just purchased a 2004 240 Sundancer. I brought the boat home and connected the shore power to my house to charge the batteries and have power while I cleaned it out. Initially the voltage of both batteries were about 11.6v, after about 24 hours of charging they now read 13.6v. While I was...

We almost didn't take this vessel over initially due to the bypasses and work arounds but everything works, SO ... Last visit I went through the batteries, cleaning and servicing them and tracing the wires noting their condition and whether or not they were run correctly or rerouted or bypassed...

Does anyone know what alternator came on a 1987 V6 175 Mercruiser? Alternator make and amp output? I've got twin v6's charging 3 batteries, 1 engine charging 1 battery and the other engine charging 2 batteries. The 2 battery bank is getting a high charging rate. i'm wanting to add a battery...

Does anyone know what alternator came on a 1987 V6 175 Mercruiser? Alternator make and amp output? I've got twin v6's charging 3 batteries, 1 engine charging 1 battery and the other engine charging 2 batteries. The 2 battery bank is getting a high charging rate. i'm wanting to add a battery...

This weekend, my engine would backfire occasionally when I would bump my trim tabs. I would think it would be charging issue, but don't really know where to start. It charges 13-14 volts when above idle. Any suggestions would be appreciated.