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Old 16 December 2013, 08:11   #11
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Just be careful where you mount it - the regulator type ones can run very hot.

(but as I found the "rectify only" type can toasty a battery - the Clamshell only has a rectifier - I measured 19.7V at 1500 rpm. No wonder my batteries weren't lasting!

Now have a rect / reg off a Honda O/B strapped to the side of my air box (to keep it cool!)
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Old 16 December 2013, 15:55   #12
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I converted my 40HP to charge a battery and to electric start. All I needed to do was add a voltage rectifier/regulator. A unit from Ebay fit the bill perfectly and has worked great charging an AGM battery. My motor already had the charge coil installed.
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Old 16 December 2013, 16:13   #13
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Variable voltage regulators are avail fom maplins and other associated stores
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Old 17 December 2013, 08:15   #14
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Quote:
Originally Posted by matt h View Post
Variable voltage regulators are avail fom maplins and other associated stores
I also looked at that option, but with a charge coil throwing out 19+ V, I did some maths on a worst case flat battery, which needed a fairly high current rated one (came out at something like 20A, and a big heatsink.

You might not be surprised to hear by the time you have bought the bits, a used one off a dead outboard was the easiest & cheapest way to go (and one off an old O/B will be a bit more water resistant).
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