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 tractor battery or group 24? 
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MMT 1000 Club

Joined: Mon Sep 19, 2011 6:32 pm
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Location: south Florida
Post tractor battery or group 24?
Backwater recommends a tractor type battery, like the Interstate SP-40, 350 CCA, weight 18.4 lbs.
I am trying to shave some weight and space under the bow. I've been using a group 24 type Marine starting battery 650 CCA, weight 43 lbs. I only use the battery for starting my BW 26.5 EFI swomp longtail, running lights (LED) before daylight, and occasional bilge use. I use a handheld rechargeable spotlight so no further drain. Two SP-40's would still weigh 6 lbs. less than one 24.
Anybody successfully using a tractor type battery? Any thoughts, suggestions are welcome!

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Wed Apr 24, 2019 7:54 am
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Joined: Thu Jan 31, 2013 5:42 pm
Posts: 1913
Location: Conroe tx
Post Re: tractor battery or group 24?
It is a lawn mower engine.. most deck type mowers have that small battery you are describing. It will work, however, I run a small 12 volt cca battery for starting and the accessories you have.

H Finn

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Wed Apr 24, 2019 8:59 am
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Joined: Fri Jul 08, 2011 1:54 pm
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Post Re: tractor battery or group 24?
Yep. No need for a big battery if you're only cranking and a couple of lights.

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Wed Apr 24, 2019 9:25 am
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Post Re: tractor battery or group 24?
23hp backwater on my 15ft boat. I run the small battery also. Running lights, 2 interior led lights, bilge and 11 inch spot up on the bow. 2 years never a problem. Remember even if you loose juice to start...just hand crank the motor to get going.


Wed Apr 24, 2019 9:22 pm
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