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Old 11-05-2013, 22:18   #16
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Re: Motorcycle battery for small electric start outboard

agree with JackB, the A123 cells are a real powerhouse. A friend as broke records with his electric drag motorcycle using those cells. 1 lb sure beats the weight of my 15 lb AGM.
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Old 12-05-2013, 17:25   #17
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Re: Motorcycle battery for small electric start outboard

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Originally Posted by Ostinato View Post
I recently purchased a 10hp electric start outboard because I injured my shoulder. I need to buy a battery for it and the manufacturer claims it needs only 40-70 cold cranking amps. Car batteries look like over kill.

Has anyone had any experience using motorcycle batteries?
Nearly missed this thread. Yes, I've used a Harley AGM motorcycle battery (weighing about 22 pounds or so) on a Honda BF100. I liked having lights at night you could see.
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Old 13-05-2013, 18:41   #18
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Re: Motorcycle battery for small electric start outboard

I use a $30 garden tractor battery to start my 25 hp Yamaha outboard. Even when I had a fuel pump problem, it cranked it forever.
Fits in a std, battery box, with room for a quart of 2 cycle oil.
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Old 13-05-2013, 19:11   #19
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Re: Motorcycle battery for small electric start outboard

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Originally Posted by over40pirate View Post
I use a $30 garden tractor battery to start my 25 hp Yamaha outboard. Even when I had a fuel pump problem, it cranked it forever.
Fits in a std, battery box, with room for a quart of 2 cycle oil.
I once had a garden tractor and I never got more than one season from a garden tractor battery. I ended up jump starting it from my truck as often as not. I think I would be looking at the motorcycle battery or some other option.
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Old 15-05-2013, 14:49   #20
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Re: Motorcycle battery for small electric start outboard

I have finally hooked up my AGM motorcycle battery and it starts the 10hp outboard engine easily. Now we'll see how it works over time.
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Old 16-05-2013, 06:07   #21
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Re: Motorcycle battery for small electric start outboard

We have 4 years on our Walmart garden tractor battery in daily use starting our 15hp and running the dinghy bilge pump. Got 3 years off the previous one, but that one was running the bilge pump almost daily and only being partially recharged every 7-10 days.

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