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Author Topic:   Battery: Alternatives for non-electric start engines
Bugsy posted 10-22-2003 01:17 AM ET (US)   Profile for Bugsy   Send Email to Bugsy  
Greetings, I just purchased my first boat, a 1964 13.5ft Whaler. It has a 1973 25hp Johnson outboard. The Whaler is in good condition with no holes or defects, just a few spider cracks. This website has been tremendously helpful. I have already repaired the cracks and refinished the mahogany. The motor runs well. I think the package was a decent deal for $700. Now for the easy question. Since the motor is a manual start, I only need a battery for the fish finder and the lights. Conventional marine batteries seem like overkill and the $95.00 jetski battery the guy at the boat shop tried to sell me seems expensive. What are my alternatives? Any suggestions would be appreciated.
Jarhead posted 10-22-2003 08:04 AM ET (US)     Profile for Jarhead  Send Email to Jarhead     
You might try a lawn tractor battery. Wal-Mart sells them for about $20.
hauptjm posted 10-22-2003 10:34 AM ET (US)     Profile for hauptjm    
Buy a deep cycle marine battery for approximately $85.00 and a good battery charger and forget about it for 3-5 years. Drop the charger on the battery two nights before you use the boat, unplug her and go.
Bigshot posted 10-22-2003 11:18 AM ET (US)     Profile for Bigshot  Send Email to Bigshot     
K-fart you can get a real marine battery for $45.
Florida15 posted 10-22-2003 11:53 AM ET (US)     Profile for Florida15  Send Email to Florida15     
Go to Sam's Club and get a marine deep cycle for $40.
Academy Outdoors also has good prices on marine batteries
especially the dual purpose Stowaway.
lhg posted 10-22-2003 02:40 PM ET (US)     Profile for lhg    
Don't know what we'd do without you, Nick.
Bigshot posted 10-22-2003 03:12 PM ET (US)     Profile for Bigshot  Send Email to Bigshot     
Spend $95 on an Interstate battery:)
Bugsy posted 10-22-2003 09:38 PM ET (US)     Profile for Bugsy  Send Email to Bugsy     
Thanks for the ideas, everyone seems to have a different one, but being financially challenged, I'm off to Sam's to look at the marine batteries.
Sal DiMercurio posted 10-22-2003 10:12 PM ET (US)     Profile for Sal DiMercurio  Send Email to Sal DiMercurio     
Bugs, you don't need a marine battery just for lights & fish finder as long as you store it at the stern of the boat where it wonmt get pounded to hard.
Remmember this, the heavier the battery the longer it holds juice.
If you buy a group 24 or smaller, you will need to charge it alot more then if you buy a 27 or heavier.
If you can pick it up with 1 hand & walk normal, it aint gonna hold much power.
When you feel your testes go down to your soxs when you pick it up, you will have power to spare.
captbone posted 10-22-2003 10:41 PM ET (US)     Profile for captbone  Send Email to captbone     
Get the marine battery and a smaller solar panel to recharge it.
CHRISWEIGHT posted 10-23-2003 02:05 PM ET (US)     Profile for CHRISWEIGHT  Send Email to CHRISWEIGHT     
we had a 12'6" bonwico with a 25 mariner and used a yuasu 7 amp hour sealed lead acid battery, this battery type holds charge very well. we run the fishfinder bilge pump and compass light.

output from motor was AC so we built a small circuit with bridge rectifier and I think LM 308 voltage control regulator, works a treat and battery is very light.

fishfinder will normally have supply voltage readout(usefull for charging info)I used a 35amp bridge rectifier mainly because it had nice big tags to solder.

made circuit on vero board and placed in dia cast alloy box under dash painted with hammerite.

I thought full size battery was a complete overkill and very heavy. Fishfinder pulls about 250mA and bilge pump under load 1.1A sowill run for ages whilst at rest.


CHRISWEIGHT posted 10-23-2003 02:09 PM ET (US)     Profile for CHRISWEIGHT  Send Email to CHRISWEIGHT     
sorry total cost battery $15 Electronics and box $8
CHRISWEIGHT posted 10-23-2003 02:18 PM ET (US)     Profile for CHRISWEIGHT  Send Email to CHRISWEIGHT     
regulator is LM338T brain in reverse. can probably scan a circuit diagram if your interested, as long as i can cope with the technology.


hooter posted 10-23-2003 10:38 PM ET (US)     Profile for hooter    
Ah'm with Sal on the heavy equals mighty pernt. Seein' as you is a kid, before you go to the store, get yourself a truss, bub, or at least be wearin' a jockstrap.
doobee posted 10-24-2003 10:17 PM ET (US)     Profile for doobee  Send Email to doobee     
The key word here is deep cycle. That will keep your boom box running all day!)
elaelap posted 10-25-2003 12:32 AM ET (US)     Profile for elaelap  Send Email to elaelap     
Naw, you got screwed if you paid $700 for the boat the way you describe her. Don't waste any more money on batteries and stuff, Bugsy. I'll tell ya what...Christmas is just around the corner so I'm feeling real generous. I'll take her off your hands for a grand, sight unseen, just so you don't get all depressed and stuff about being ripped off.

Just trying to help.


Bugsy posted 10-25-2003 12:47 AM ET (US)     Profile for Bugsy  Send Email to Bugsy     
He, he , he, this is some sub-culture. I think being a boat owner, no, a Boston Whaler owner is going to be a blast. Tony, I think I'll keep' least for now, but Merry Christmas anyway.
jimh posted 10-25-2003 10:41 AM ET (US)     Profile for jimh  Send Email to jimh     
[Changed TOPIC; was "Easy Question"]

Does your engine have a battery charging circuit?

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