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Battery size for starting an outboard

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bassmaster1234

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I have a 7.5 hp mercury outboa

I have a 7.5 hp mercury outboard (1981) and I was wondering what size battery do I need? I was thinking in getting a dual purpose battery.
 
"A lawn mower sized one should

"A lawn mower sized one should do the trick, but use a marine, deep cycle instead. Lots of power for lights and etc.

Jeff"
 
I need to know what the cranki

I need to know what the cranking amps should be? I can't get that big of a battery cause of weight issuses. I only have a 12' jon boat.
 
I would guess that a reasonabl

I would guess that a reasonable sized motorcycle battery will do the job. Use a battery made for a bike with similar motor size as your outboard.
5-10Ah would be enough?
Robert
 
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