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2019 X-Star Ballast Fill Alternator Replacement

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  • jackpine
    replied
    Has anyone done the alternator 0 gauge power cable upgrade for the 7.4L Ilmor?

    I preordered the cables based on a post from this thread but unfortunately they are short.
    Last edited by jackpine; 09-23-2022, 10:29 PM.

    Leave a comment:


  • Wakejunkie
    replied
    Wow what a bummer. I will have to look up that company to see what they offer. I know my motor is the newer 350 and maybe the mcx is a different setup

    Leave a comment:


  • gwozhog
    replied
    Found a company called JS alternators that are all made in the usa. They sell a marine 170 amp alt for only 250 bucks. Hopefully will have better luck.

    Leave a comment:


  • gwozhog
    replied
    Originally posted by Wakejunkie View Post
    Damn pain in the ***. I guess that’s for fitting to older motor. Dropped right in on my 5000 Ilmor. Either way you will be pleased with it once running and all those extra amps
    Gets even worse. Alternator does not work. Completely lost faith in Chinese parts now. Reinstalled my old alternator and shipping the other one back keeping my fingers crossed for a refund.

    Leave a comment:


  • Wakejunkie
    replied
    Damn pain in the ***. I guess that’s for fitting to older motor. Dropped right in on my 5000 Ilmor. Either way you will be pleased with it once running and all those extra amps

    Leave a comment:


  • gwozhog
    replied
    One thing I learned about after market is that it’s never a perfect fit. The Chinese alternator had a insert that I had to cut with a hacksaw. Not too big of a deal but A little frustrating because my blade was dull and it was hotter than hell outside. My new Forum wire should arrive tonight just in time for some boating this weekend.

    Leave a comment:


  • gwozhog
    replied
    Originally posted by Wakejunkie View Post

    Good deal! It should bolt up just fine. I don’t have any inline fuses on it. I did upgrade stock 6 gauge wire to 2 gauge for the amps to distribution blocks for + and - not a single issue yet and much more voltage when running my fast fill ballast pumps.
    I spoke with a Porsche mechanic today and he said dont worry about a fuse too.

    Leave a comment:


  • Wakejunkie
    replied
    Originally posted by gwozhog View Post

    Went ahead and ordered the same alternator for $153 bucks. Was going to buy the 800 dollar one but money saved is going to towards a new Rolex instead lol. Thanks for link on your post on page 2 on where to buy the upgraded wire. Hopefully it fits my MCX engine with no problems. Did you have a fuse installed on the positive cable between the alternator and starter?
    Good deal! It should bolt up just fine. I don’t have any inline fuses on it. I did upgrade stock 6 gauge wire to 2 gauge for the amps to distribution blocks for + and - not a single issue yet and much more voltage when running my fast fill ballast pumps.

    Leave a comment:


  • gwozhog
    replied
    Originally posted by Wakejunkie View Post

    Informative video. Wow that’s more than the mech man one at $800. So far my 150 amp one has been perfect for $125. New cables cost $40. Great option for 20 amps less
    Went ahead and ordered the same alternator for $153 bucks. Was going to buy the 800 dollar one but money saved is going to towards a new Rolex instead lol. Thanks for link on your post on page 2 on where to buy the upgraded wire. Hopefully it fits my MCX engine with no problems. Did you have a fuse installed on the positive cable between the alternator and starter?
    Last edited by gwozhog; 06-12-2022, 10:59 PM.

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  • Wakejunkie
    replied
    Batteries are key! Dealers put in their own pick of batteries. Mine came with optima 31 crank and 27 house. All I had to upgrade was alternator and wiring.

    Leave a comment:


  • swoardrider
    replied
    FYI, I have struggled with voltage issues on my 50th Aniv. X Star since day one. Even after the installing the upgraded alternator. After hours upon hours of dealing with voltage issues with and without the pumps on, I finally found a solution.
    After talking to a lot of technicians over at the XS Power battery company, they taught me a thing or two about vehicle charging systems. You can’t just fix one design flaw and expect to fix the issue. You have to do the “big 3”.
    1. Batteries
    2. Alternator
    3. Wiring
    it’s the same philosophy that all the bass crazy cars use in competition. We basically have massive current draws when we run these pumps, just like having giant amps and subwoofers in a mini truck! On top of that we have a very heavy current draw from the onboard electronics all the time, unlike a mini truck!
    So, the solution is:
    1. Hi current flow batteries (not the ****ty Interstate garbage that comes with the boat)
    2. proper size alternator
    3. proper size wiring (this is the one thing Mastercraft did do right)

    since the dealership put in the high output alternator in my boat, the last thing I needed was a really strong battery bank. So I chose to ditch all the lead acid batteries, and go with state-of-the-art Lithium titanium batteries. Now, no more problems. Originally boat used to only see 13-13.5 volts without pumps, and 11-11.5 volts with pumps on. Now, it always sees 14.5 volts, and 13-13.5 volts with pumps on.

    happy boat, happy captain

    Leave a comment:


  • Mystic3D
    replied
    Originally posted by Wakejunkie View Post

    Ouch!! I’m sorry to hear about this trouble. I wonder if mech man makes different frame alternators that fit better. I’m really happy with my indmar replacement one from Amazon. I can get some measurements when I’m at the boat next time but it was exact plug and play from my stock one. I just upgraded the wiring to hold extra amps.
    it's all good, I have the Ilmor one on order, am done messing with it.

    Leave a comment:


  • Wakejunkie
    replied
    Originally posted by Mystic3D View Post

    The alternator shaft diameter(The one the pulley attaches to( is smaller on the Mechman Alternator. I ran the wires and was about to install it, There is also no grounding lug on the mechman, and the mounting bolts are 5/15 and 3/8 on the Mechman vs 10mm and 12mm on the Ilmor Alternator. Had also sourced longer bolts 12mm and 10mm to compensate for the spacers and thread engagement.(I realize this is not much(.168) but OCD Prevails)

    So at this point $500 down the drain as Mechman doesn't allow returns, and I ordered the Ilmor 180A for $1,200.

    I had the spacers ready to go, and am sure I could make the bolts work, and ground to the mounting point. Just too far off OEM for my taste.

    So if anyone wants a New In Box(never mounted Mechman with AL Spacers) for a good price, PM me.
    Ouch!! I’m sorry to hear about this trouble. I wonder if mech man makes different frame alternators that fit better. I’m really happy with my indmar replacement one from Amazon. I can get some measurements when I’m at the boat next time but it was exact plug and play from my stock one. I just upgraded the wiring to hold extra amps.

    Leave a comment:


  • Mystic3D
    replied
    Originally posted by jackpine View Post
    Ha, I don't suppose MC would sell us just the pulley (at probably $300 a pop )?

    At this point we couldn't be lucky enough to be able to swap the pulley from the old to the new at an alternator shop, or are they vastly different, mounting point, etc.?
    The alternator shaft diameter(The one the pulley attaches to( is smaller on the Mechman Alternator. I ran the wires and was about to install it, There is also no grounding lug on the mechman, and the mounting bolts are 5/15 and 3/8 on the Mechman vs 10mm and 12mm on the Ilmor Alternator. Had also sourced longer bolts 12mm and 10mm to compensate for the spacers and thread engagement.(I realize this is not much(.168) but OCD Prevails)

    So at this point $500 down the drain as Mechman doesn't allow returns, and I ordered the Ilmor 180A for $1,200.

    I had the spacers ready to go, and am sure I could make the bolts work, and ground to the mounting point. Just too far off OEM for my taste.

    So if anyone wants a New In Box(never mounted Mechman with AL Spacers) for a good price, PM me.
    Last edited by Mystic3D; 02-23-2022, 07:32 AM.

    Leave a comment:


  • jackpine
    replied
    Ha, I don't suppose MC would sell us just the pulley (at probably $300 a pop )?

    At this point we couldn't be lucky enough to be able to swap the pulley from the old to the new at an alternator shop, or are they vastly different, mounting point, etc.?

    Leave a comment:

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