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Old 11-10-2007, 01:39 PM
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Default alternator amp for msd

What amp should your alternater be when running a msd on a single engine application......I ask because my housing on my alternator was cracked and i think it was giving a weak charge to the batteries and in turn not firing my msd properly......If ya have had similar problems post your expierince please..........65amp is what a aftermarket marine alternator is and i dont think that is enough....
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Old 11-10-2007, 02:37 PM
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They recommend hooking the MSD hot wire to the bat. Mine is hooked to the starter,Stock 500efi alt,a 55 or 65 amp.It also has a aftermarket fuel pump drawing on it. no probs
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Old 11-10-2007, 04:09 PM
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Thanks rob.............need some quality vids in the uncensored if ya got time..............lol
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Old 11-10-2007, 04:31 PM
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I don't think that the MSD is drawing any were near 65 amps. They should have that in a spec however. Your wire does need to go to a QUALITY supply with the correct guage wire. Are you having trouble starting or just running in general?
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Old 11-10-2007, 04:48 PM
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Its my mid range and wide open throttle.....It is hard to tell bringing the boat up on plane whether or not it is effected.....I might be splitting hairs here but once ya really get in tune with your motor you sense everything....
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Old 11-10-2007, 05:08 PM
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Ya ck the timming? Is it retarded like me

is it carbed? fuel prob maybe?
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Old 11-10-2007, 07:05 PM
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i was fighting a 3 circuit dominator all summer....(thinking i can tune it for marine use) i am going to start fresh with a 2 circuit marine next summer from teague or fred at trick.......Then i will see what problems i have then....Other than that it still ran 80.2 on gps .....Not bad for a deep x on a heavey old mag.....
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Old 11-10-2007, 11:05 PM
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Originally Posted by nocigarette
i was fighting a 3 circuit dominator all summer....(thinking i can tune it for marine use) i am going to start fresh with a 2 circuit marine next summer from teague or fred at trick.......Then i will see what problems i have then....Other than that it still ran 80.2 on gps .....Not bad for a deep x on a heavey old mag.....


You need to get with rumrunner(Doug) at Barry Grant !!!!!
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