View Full Version : LTR Alternator Upgrade Options

Jeff d
05-02-2011, 10:04 PM
I have an '00 MariStar with an LTR that has a 51 amp alternator. It's off at the moment due to bolt failure last time I had it out but as far as I know it still works fine.

It does however look pretty ugly and I'm certain it was under water when the previous owner either forgot to remove the plug or the drain hole got plugged up with junk when stored. I'm actually surprised it still works but it's been going strong for the 30+ hrs that I've owned it.

So, I want to figure out what my best option is when this thing finally does fail. I can get the exact same one for $190 here:

but was wondering if I should/could get one with a little bit more amperage (70ish?) or have this one rebuilt for higher output. I just run one battery and a 200 watt amp right now for the tower speakers but may add a 6 channel amp, subwoofer, and maybe a 2nd battery in a year or two.

Could I just throw the "normal" 70 amp indmar/PCM 5.7L alternator on there?

The mounting configuration looks the same in the pics but it might not be. I don't want to introduce any belt alignment issues or anything.

I already have 2 gauge wire for my positive to the starter and ground to the engine so I think that would be ok but might need to supplement the smaller wires that connect to the alternator itself.

05-02-2011, 11:05 PM
If you have them time, I'd get a local shop to rebuild/upgrade it. I belive that's ususally the most cost effective option.