View Full Version : New Alternator?

08-15-2010, 10:27 AM
2002 X-9 w/ 320hp engine

I have been having issues with power supplies for last few months. When @ Idle and stereo running with low volume, I will get an alarm from ICM, I am 99% sure this is from my votlage meter dropping or approaching 12 volts or less. I bought a 2 farad capacitor and this worked for a day or 2, but requires recharging battery in the evening. I am thinking I need to upgrade the original stock Alternator with a biiger /better one.

1st Question has anyone seen or heard of similar problems with voltage supply?

2nd Can you recommend a specific Amperage Alternator and maybe give some tips for install

I am only running 2 400Watt amps, to 1 12" Sub and 2 Tower Speakers, and 4 In boat speakers.

many Thanks,

SpiceWood X-9

TX.X-30 fan
08-15-2010, 03:06 PM
How many batteries and what condition are they or it in?? What is the alt, I would guess a 70 amp. Stock alt should be fine with that stereo setup so I would look at the battery condition first.

TX.X-30 fan
08-15-2010, 03:07 PM
Hey I'm on the other side of the lake from you.

09-10-2010, 11:44 PM
if boat is idling battery shouldnt be the issue motor and all eletrical are getting full supply of what alternator should be given 70 amps should be enough juice sounds like voltage regulator problems to me