Which alternator to buy? Cant read the model # on mine

[04Gravity]

Hey guys, Im looking to buy the alternator from db electrical that wotan and mikey bought. I cant read the model # on mine to know which one to purchase. I have a 92 Comp with PCM 351. What is the model # of the 105 amp one???

[87SunSportMikeyD]

Here you are sir!

http://www.db-starter-alternator.com/Items/adr0334%20-%2010si-marine%201-wire?sck=6745929&caSKU=adr0334%20-%2010si-marine%201-wire&caTitle=NEW%20105%20Amp%20Delco%20Marine%20Alterna tor%20Mercruiser%201-Wire%20ADR0334

12 Volt, 105 Amp New Delco 1-Wire Marine Alternator fits Mercrusier, OMC and many other applications.

100% Brand New!

Alternator - Delco 10SI Series
105 Amp, 12 Volt, CW, 1-Groove Pulley, 1-Wire

Interchange numbers:
API Marine: 20051
ARCO Marine: 20102
Delco: 1100576, 1100577, 1102393, 1102496, 1105478
Mercury Marine: 56045, 59755, 69729
OMC: 983424, 983836, 988247

[04Gravity]

Thank you!

[Morphix]

Yep, that's the exact same one I put in my 92' Supra Comp 2 years ago, works like a champ!

[04Gravity]

UPS just dropped it off yesterday. How do I wire this thing up????

[Morphix]

Hey Grav,

It's fairly simple. Here's an old Alternator diagram that I found a long time ago which helped me figure out what is what and what should go where, my memory escaped me completely but I'll go snap some pics of how mine is wired on when I get a chance this weekend, but this diagram helped me a lot and should give you a good start.

http://bpi.ebasicpower.com/charge/images/alternatorwiring.jpg

Hope it helps!

[Mani]

I'm thinking about ordering this same alternator, and I am wondering if this will work for an '86 PCM 351 as well.

My big concern is wiring thing up. I looked at the diagram, but I'm not good with electrical things :oops: . Any help would be appreciated.

[wotan2525]

These are actually even simipler than the diagram... Your old alternator is a 3-wire setup... the new ones are 1-wire alternators which means (I assume) that they ground themselves through the chasis. You only need to hook up a postive cable to the + side of the battery and you are good to go. I used 00-gauge wire (but I have a lot of stereo equipment and am running everything at 0 or 00 gauge.) I'd recommend at LEAST 4-gauge.

Mani -- It is a "universal" fit alternator and it should work. You might want to double-check with a quick call to DB, first. They have always been easy to work with.

[Mani]

Thanks, Wotan. I appreciate it!

[bens 1985 supra sunsport]

I just replaced mine this weekend. I went with the 10SI model. It bolted right in and used the existing Positive and ground. It took all of about ten minutes to replace. Great price..

[Mani]

Wotan, I'm running 00 wires on both batteries. The new alternator that's coming in today is the 105 amp version of the single wire.

I'm still wondering about the third wire on my current alternator. Do I need to just leave this one hanging, too?

Also, my current positive wire off the alternator runs into my wiring harness, which will not accept that large of a wire. Should I just bypass it and run a 4 guage or larger wire directly to the battery selector?

Sorry about all the question, but I'm not very good with electrical things.

[wotan2525]

No problem -- I bypassed the wiring harness and just ran it directly. The third wire I just clipped off as close to the wiring harness as possible and then sealed it off with electrical tape. Others may have better ideas?

[Mani]

Okay, so I got the alternator in (beefy, I like it :D), got 2 gauge wire running from the alternator post to the battery selector's common positive wire. I figure this way, I'll be able to still use my selector switch, instead of having it run to only one battery.

The positive, ground, and third wires, I clipped off and masked with electrical tape, to prevent a shorts and sparks from flying. The positive wire from the wiring harness is still a hot wire when a battery is selected. Is this normal?