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Old 09-26-2020, 06:33 AM   #1
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Ballast

Good Morning
I took out 4 dead L16 batteries as they were not needed . I need to replace that weight, (500 lbs).
Suggestions?
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Old 09-26-2020, 07:06 AM   #2
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25 cases of beer.
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Old 09-26-2020, 07:36 AM   #3
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Put them back on.
We have near 1500lb of dead batteries on board.
Seemed counter intuitive pulling out 1500lb of weight so as to put another 1500lb of weight back in.
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Old 09-26-2020, 08:12 AM   #4
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If they're truly dead then drain out the acid, flush and then refill with water. Make them inert.
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Old 09-26-2020, 08:41 AM   #5
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If they're truly dead then drain out the acid, flush and then refill with water. Make them inert.

How do you go about draining the acid from a battery? I have 2 8Ds which are nearing the end and that would lighten them for moving.



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Old 09-26-2020, 09:03 AM   #6
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Just tilt them over and drain them into your bilge.

Or stick a hose in it a suck the acid out.

What could go wrong?????
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Old 09-26-2020, 09:34 AM   #7
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Only way I can think of is tilting them over into a suitable container, then neutralize the acid and dispose of it properly. However, your 8D is a heavy beast so you'd need two people at least to move it. Not sure if there is any type of pump that could be used.


However it might not be worth the effort. What is the true weight of the liquid in an 8D? If you're only lightning by 10lbs or 20lbs then that's minimal.
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Old 09-26-2020, 09:56 AM   #8
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Just tilt them over and drain them into your bilge.

Or stick a hose in it a suck the acid out.

What could go wrong?????

Wow Just kidding right? Talk about a way to get seriously burned.
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Old 09-26-2020, 11:11 AM   #9
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25 cases of beer.
50 cases if its light beer....
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Old 09-26-2020, 03:40 PM   #10
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If they're truly dead then drain out the acid, flush and then refill with water. Make them inert.
AGM's for us.
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Old 09-26-2020, 03:46 PM   #11
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We added ballast to a previous boat. I used 66 pound lead ingots and then glassed over them to keep them in place and also to contain any lead particles that might have rubbed off since lead is particularly friendly to humans.
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Old 09-26-2020, 04:58 PM   #12
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Put them back on.
We have near 1500lb of dead batteries on board.
Seemed counter intuitive pulling out 1500lb of weight so as to put another 1500lb of weight back in.
X2. Why take them out if you feel you need that weight in ballast? I wonder if the boat was even designed to have them in there to begin with.
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Old 09-27-2020, 12:27 AM   #13
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Thanks fellows, very humorous.
Batteries are long gone, part of another battery deal.
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Old 09-27-2020, 12:29 AM   #14
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I'm wondering is lead worth the money or scap steel, rock, etc?
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Old 09-27-2020, 05:15 AM   #15
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I'm wondering is lead worth the money or scap steel, rock, etc?
Willards were built with concrete ballast with copious amounts of scrape steel as aggregate. Give the full keel hull design, it provides a decent sole in the engine room. But it takes a lot of space. I did the math ones and have totally forgotten the weight /density comparison, but suffice to say lead is several times more dense. If you use an alternative, you will need a lot more space.

Unfortunately, buying batteries is a pretty economical way to purchase lead dead weight. So the comments, although in jest (I think), had a ring of truth to them.

Traditionally, and as Comodave states, boat builders often use lead pigs for final trim ballast. These were typically 60-ish pound long ingots that had "ears" at the end so they could be strapped down securely. They are often tucked away in hidden places, often outboard to trim stbd/port list.

https://www.rotometals.com/whole-lea...2-pounds-99-9/

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Old 09-27-2020, 07:42 AM   #16
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I guess I'm missing something. If you have four dead batteries you replace them with four good batteries, right?

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Old 09-27-2020, 07:53 AM   #17
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I guess I'm missing something. If you have four dead batteries you replace them with four good batteries, right?

pete
OP said they were not needed. I assumed he went lithium or something.
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Old 09-27-2020, 08:08 AM   #18
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...personally, on any trawler 36' and over....I wouldn't sweat 500 pounds unless all of a sudden it handled way differently.

Most boats really aren't designed with the larger house battery bank many of us add...so stability shouldn't drop to dangerous.

But if still interested....I would be looking for scrap lead.
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Old 09-27-2020, 08:59 AM   #19
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...personally, on any trawler 36' and over....I wouldn't sweat 500 pounds unless all of a sudden it handled way differently.

Most boats really aren't designed with the larger house battery bank many of us add...so stability shouldn't drop to dangerous.

But if still interested....I would be looking for scrap lead.
Good point - thinking about it, I agree that OP may want to consider whether the weight really needs to be replaced.

That said, I had some of my concrete ballast torn out. Boat is in Ensenada 75 miles south of San Diego. It took a while but my yard guys did find some scrap lead in Tijuana. It still wasn't all that cheap - I think it was $1/lb and wasn't tremendously clean which was fine, but still - you'd think I could do better in Tijuana (a large industrial city) for 800 lbs scrap. I guess there's a pretty efficient market for recycling these days.

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Old 09-27-2020, 12:44 PM   #20
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When I bought my Nordic, it had maybe 600 pounds of bagged sand as ballast, stacked far aft against the transom. I had to shift it some to starboard to balance against my large tender which sits far aft on a Freedom Lift.

However, I noticed my waterline was underwater. It might have been due to the weight of batteries for the new stern thruster. Anyway, I had it all removed from the boat, the boat now sits properly in the water, and no effect on handling.
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