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Old 16 May 2007, 05:30   #1
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battery size....

The manual for my Tohatsu 90 TLDI staes that i should use a 100 amp hour battery, but looking at the pysical size of one of these it's huge!! Do you think that i would get away with a 60 or 75 amp hour car battery, that way it would be a much better fit under the console....
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Old 16 May 2007, 06:08   #2
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If the engine manufacturer suggests a 100amp hour battery, that is what you need. They may even suggest something more for cold weather use. They probably suggest that based on the expected cold cranking current requirements.

I have a 90 Mercury and two 110 amp hour batteries.

Don't forget you could sit having a picnic, fishing or whatever with electronics running and you still want an easy start even with a partially discharged battery.

With a battery of lower capacity you could need to use heavier cables to maintain the voltage to the engine.
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Old 16 May 2007, 07:07   #3
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A new 75A battery is going to perform better than a tired 100A - unless you make a habit of boating in sub zero conditions you should be ok. Let's face it you can start engines on a booster pack and they often have tiny batteries in them.
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Old 16 May 2007, 09:54   #4
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Quote:
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The manual for my Tohatsu 90 TLDI staes that i should use a 100 amp hour battery, but looking at the pysical size of one of these it's huge!! Do you think that i would get away with a 60 or 75 amp hour car battery, that way it would be a much better fit under the console....
Have a look at a Squadron battery. We have just got one, 100amp/hr. It fits inside a jockey seat. Its more compact than a car battery:-

http://www.aquamarineuk.com/product_...oducts_id=1352
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Old 16 May 2007, 10:00   #5
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Have a look at a Squadron battery. We have just got one, 100amp/hr. It fits inside a jockey seat. Its more compact than a car battery:-

http://www.aquamarineuk.com/product_...oducts_id=1352
They are made/imported by Engery Batteries in Corby Northants, they do mail order too ?
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Old 16 May 2007, 15:10   #6
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i have two 120/130 squadron batteries, were 70 quid each and i have very heavy battery cables as well, i never think it is worth scrimping on a battery as its the only way you can start some of these outboards and some need to turn a full revolution before they fire
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Old 16 May 2007, 15:48   #7
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Those batteries look very good value.
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Old 16 May 2007, 17:04   #8
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those look nice....as they are spill proof etc do have to put them in a battery box if they are in a watertight locker?
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Old 16 May 2007, 17:21   #9
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those look nice....as they are spill proof etc do have to put them in a battery box if they are in a watertight locker?
i put mine in battery boxs just to protect them from other stuff and ensure nothing can touch the terminals, if you have space it is a nice idea
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Old 16 May 2007, 17:21   #10
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those look nice....as they are spill proof etc do have to put them in a battery box if they are in a watertight locker?
Going by their website, the SFL range are sealed, maintenance free and leak-proof.

http://www.energy-batteries.com/

~Ours is not in a watertight locker, but I cannot vouch for it as it was a replacement battery as the original only lasted one season. However, I was assured that the original battery was from a duff batch.
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