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Weight relationship fore to aft
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BTDT



Joined: 07 Jan 2011
Posts: 322
City/Region: Grand Lake Oklahoma
State or Province: OK
C-Dory Year: 2007
C-Dory Model: 255 Tomcat
Vessel Name: C- Lark Wine Down
Photos: C-Lark
PostPosted: Fri Mar 03, 2017 3:58 pm    Post subject: Reply with quote

My two cents- I purchased a Lithium Ion jump starter battery that will actually turn over a pickup truck diesel engine (Duramax/Powerstroke). Its the size of a cigar box and weighsut close to a carton of eggs. I take it on the boat when traveling and keep in the pickup when not boating.

Not cheap at around $125 but what is peace of mind worth?

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John & Vicki Clark
C-Lark Wine Down
Tomcat 255
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SEA3PO



Joined: 02 Nov 2003
Posts: 1835
City/Region: Chester
State or Province: CA
C-Dory Year: 2003
C-Dory Model: 22 Cruiser
Vessel Name: SEA3PO
Photos: SEA3PO
PostPosted: Fri Mar 03, 2017 4:08 pm    Post subject: Reply with quote

Gosh, My Optima batteries were $230 each...so you got a deal...

Joel
SEA3PO
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AKMel



Joined: 13 Jan 2017
Posts: 47
City/Region: Gustavus
State or Province: AK
C-Dory Year: 2008
C-Dory Model: 22 Cruiser
Vessel Name: C-esta
PostPosted: Fri Mar 03, 2017 5:11 pm    Post subject: Reply with quote

BTDT: Not a bad idea. I like creativity. Any idea on the life expectancy of the lithium ion pack?
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Aurelia



Joined: 21 Aug 2009
Posts: 2331
City/Region: Gig Harbor
State or Province: WA
Photos: Aurelia
PostPosted: Fri Mar 03, 2017 6:26 pm    Post subject: Reply with quote

We have a 19 so the heavy stern is noticed more than with the 22. We put two 70lb batteries under the berth along with about 100lbs of additional stored items plus carry another 45lbs at the bow when we have our trolling motor mounted.

Even with that nearly 300 additional lbs forward and the fact that our 70lb daughter nearly always rides up in the berth when under way, we still feel like the bow is much lighter and more bouyant feeling than the bow of our 25 ever felt. No handling issues and much improved visibility forward while at planing speeds. The boat just rides much flatter than it did before and the tabs and permatrim give the range of adjustment one would expect instead of always being nearly maxed out.

Greg

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Greg, Cindie & Aven
Gig Harbor
Aurelia - 25 Cruiser sold 2012
Ari - 19 Cruiser sold 2023
currently exploring with "Lia", 17 ft Bullfrog Supersport Pilothouse
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BTDT



Joined: 07 Jan 2011
Posts: 322
City/Region: Grand Lake Oklahoma
State or Province: OK
C-Dory Year: 2007
C-Dory Model: 255 Tomcat
Vessel Name: C- Lark Wine Down
Photos: C-Lark
PostPosted: Sat Mar 04, 2017 8:18 am    Post subject: Reply with quote

AKMel wrote:
BTDT: Not a bad idea. I like creativity. Any idea on the life expectancy of the lithium ion pack?


Good question. My lithium ion power tool batteries have been holding up well as has my iPhone and iPad batteries, so I'm assuming much the same results, but you know what "assume" can mean. You can also use it to run laptops, smart phones, ipads, etc.

The Microgravity 10 is made in the USA, and Hulltruth has a number of threads on them. Consumer Reports rated them #1, and I see my #10 model is now $200.

edit- If you have a shorted battery on your boat I suspect you could melt the small jumper cables, and even if the motor started I suspect it would die again shortly. If the start battery is hot to the touch you need to remove it from the system.
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AKMel



Joined: 13 Jan 2017
Posts: 47
City/Region: Gustavus
State or Province: AK
C-Dory Year: 2008
C-Dory Model: 22 Cruiser
Vessel Name: C-esta
PostPosted: Sat Mar 04, 2017 11:49 am    Post subject: Reply with quote

Amazing isn't it. That many mAh in such a small package. My old-school brain doesn't want to trust something that small.

I wonder what our boat systems will look like in 20 years?
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SEA3PO



Joined: 02 Nov 2003
Posts: 1835
City/Region: Chester
State or Province: CA
C-Dory Year: 2003
C-Dory Model: 22 Cruiser
Vessel Name: SEA3PO
Photos: SEA3PO
PostPosted: Sat Mar 04, 2017 11:57 am    Post subject: Reply with quote

I am sure I have cured my Starboard lean when next to the dock...(common with the 22' ) but, I have not have a chance to test it in the water....I am doing other projects...things like carpeting the trailer bunks and fixing chips and scrapes in the gel coat... Today I am going to try to find some boat jacks to lift the boat up off the trailer so I can do the bunks....don't want to put the boat in the water and get the bunks wet...for me working on the boat is part of the enjoyment of owning a boat..

Joel
SEA3PO
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BTDT



Joined: 07 Jan 2011
Posts: 322
City/Region: Grand Lake Oklahoma
State or Province: OK
C-Dory Year: 2007
C-Dory Model: 255 Tomcat
Vessel Name: C- Lark Wine Down
Photos: C-Lark
PostPosted: Sat Mar 04, 2017 5:33 pm    Post subject: Reply with quote

AKMel wrote:
Amazing isn't it. That many mAh in such a small package. My old-school brain doesn't want to trust something that small.


I recently retired from a luxury coach manufacturer. The house batteries we used were six Group 8D AGM's weighing close to a 1000 lbs. The 600hp Cummins also used two 8D's for starting. A lithium Ion battery manufacture was able to replace the six 8d's with one battery that weighed less than 1/2 what one 8D weighed, but with more amp hours than the six combined. The two 8D start batteries were replaced with a lawn mower size battery. Pretty amazing stuff but then again look what Tesla/Volt/Prius are doing with Lithium Ion.
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AKMel



Joined: 13 Jan 2017
Posts: 47
City/Region: Gustavus
State or Province: AK
C-Dory Year: 2008
C-Dory Model: 22 Cruiser
Vessel Name: C-esta
PostPosted: Sun Mar 05, 2017 10:36 am    Post subject: Reply with quote

BTDT wrote:
The house batteries we used were six Group 8D AGM's weighing close to a 1000 lbs. The 600hp Cummins also used two 8D's for starting. A lithium Ion battery manufacture was able to replace the six 8d's with one battery that weighed less than 1/2 what one 8D weighed, but with more amp hours than the six combined. The two 8D start batteries were replaced with a lawn mower size battery. Pretty amazing stuff but then again look what Tesla/Volt/Prius are doing with Lithium Ion.


Excellent points. A battery for the Prius hybrid is suppose to last about 10 years (according to the salesman). I haven't had a Li-ion battery for one of my cordless tools go bad yet, and one is now four years old. I think it's just a matter of time til we can fit two Li-ion batteries in one battery holder.
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Foggy



Joined: 01 Aug 2013
Posts: 1518
City/Region: Traverse City; Northern Lake Michigan
State or Province: MI
C-Dory Year: 2014
C-Dory Model: 26 Venture
Vessel Name: Boatless in Boating Paradise
Photos: W B Nod
PostPosted: Sun Mar 05, 2017 4:56 pm    Post subject: Reply with quote

Beer in the bow is a practical and fun way to remedy a too portly stern.
But, excess imbibing may cause the original problem.

Aye.
Grandpa used to say, "A Gentleman never has more than 3 martinis
before dinner."
Grandma used to say, "Beer. Puts amps in my battery!"
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Ferg



Joined: 18 Jun 2015
Posts: 187
City/Region: Oak Island
State or Province: NC
C-Dory Year: 2008
C-Dory Model: 25 Cruiser
Vessel Name: Here & Now
Photos: Here & Now
PostPosted: Sun Mar 05, 2017 8:43 pm    Post subject: Reply with quote

Foggy, I think your Grandpa and I could have beeen real good friends, and your Grandma knows what she's talking about
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Foggy



Joined: 01 Aug 2013
Posts: 1518
City/Region: Traverse City; Northern Lake Michigan
State or Province: MI
C-Dory Year: 2014
C-Dory Model: 26 Venture
Vessel Name: Boatless in Boating Paradise
Photos: W B Nod
PostPosted: Sun Mar 05, 2017 9:07 pm    Post subject: Reply with quote

Ferg,

Welcome aboard.

I feel'ya.

Aye.
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Kushtaka



Joined: 17 Dec 2013
Posts: 648
City/Region: Cordova
State or Province: AK
C-Dory Year: 1993
C-Dory Model: 22 Cruiser
Photos: Kushtaka
PostPosted: Tue Mar 07, 2017 8:21 pm    Post subject: Reply with quote

I will say that adding a second battery to my starboard lazarette was an interesting endeavor. I had my kicker on the same side and moved it port, so the boat is more balanced now (slightly heavy on the battery side), but with more weight in the stern (and the kicker farther aft than it was) the boat does handle and behave differently. Most notably, if 2 or 3 adults want to ride in the cockpit instead of the cabin it can be tough to get on step when fully loaded.

I would actually like to put my batteries under my sink, and have a couple items that run straight to the battery intersect there. It's way down my list right now, but it did make a difference. Overall I'm happy with where everything is set up, and I think if I buy lighter batteries when the time comes (and maybe a lighter kicker too) I'll be perfectly happy.
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AKMel



Joined: 13 Jan 2017
Posts: 47
City/Region: Gustavus
State or Province: AK
C-Dory Year: 2008
C-Dory Model: 22 Cruiser
Vessel Name: C-esta
PostPosted: Thu Jan 25, 2018 7:58 pm    Post subject: Reply with quote

Well, thanks much for all the input. I installed the second battery under the sink. That puts both batteries on the starboard side. Then I installed the kicker to port. The combo seemed to work well. The boat doesn't list. It is a bit stern heavy IMO, even after using 30 gallons of fuel, but as stated the trim tabs handle the balance. We enjoyed the boat on multiple outings during summer in and around Icy Strait and Glacier Bay, Alaska, where we live during summer. Love being able to get out on multi day trips.
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Mel

My idea of a tragedy is a deduction killed by a fact.

2008 22 Cruiser 2017-present
2003 Alumaweld Intruder 2012-present
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