You need to learn more about the requirements of a marine
charging system. Alternator requirements have only little to do with
loads directly supported by the alternator. High charge rates are used to
recharge a large battery bank in a short period of time.

Doug
s/v Callista

"Tim" wrote in message
ups.com...
I've been following this thread a bit.

Good Lord!

What all are you pulling that would make the alt. run wide open? the
Alternator shouldn't be forced to pull any harder than ia max. of 75%
of it's capacity.

and by hooking a blower up to run cooler air to the alt. will only make
the alt. pull that much harder .

And what tickles me is that some of these companies will take an alt.
that was designed for say, 60 amps, then they will hot-rod it up to
about 175 or 220. by stuffing it full of wires and saying "this is
what you need" (gulp!) and charging you extra big bucks for something
that would requier special servicing.

I would advise checking and seeing how much your actual amperage pull
is (if you have a 100 amp draw, you need at least a135 a.rated "stock"
unit) , THEN go get a stock OEM unit (prestolite/leece-neville, large
frame Delco, Bosch etc.) and work with that. i think you'll get more
satisfactory results, and less cost involved as well.

Tim