Need help on Alternators
 

Here are the alternators off our boat. All I can find is 140 amp alternetors it says 1 wire. Ok so whats the deal with that? On ours it has a plug with 2 wires a arange wire off of a nipple and a black wire on a bolt. So will these one wire alternators work.
I know I ask some dumb stuff here at times but man I wish I knew somethings about the marine aspect of repair.


Thanks
Jeff and Jessica

Here are the alternators we are looking at

New Delco 140+ Amp 1-Wire Marine Alternator
fits Mercrusier, OMC, Volvo Penta
and many other applications.

100% Brand New!

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


This new alternator is known as a Universal Fit Alternator.
It will fit many Applications.

You need only the main charging wire connected from the positive post of the battery to the alternator output terminal.


Output at idle is 85 amps.
Maximum output of 140+ amps is achieved at 1200 engine rpms.

This is a completely new alternator - not remanufactured.

Comes Complete with New Coast Guard Approved Screens and Cover, 1-V Pulley and Front Mounting Bolt. 6 grove Pulley Available on Request.

Interchange numbers:
API Marine: 20051

ARCO Marine: 20102

Delco: 1100576, 1100577, 1102393, 1102496, 1105478

Mercury Marine: 56045, 59755, 69729

OMC: 983424, 983836, 988247

1 year warranty - no hassles - no fine print!!


http://cgi.ebay.com/ebaymotors/NEW-1...ayphotohosting

So I guess what i am asking will these things work on our 500 efi engines
Thanks

Do not alter or change your alternator. Your ecm is set up to be use with a certain alternator. Stick with the same thing that you have now. And use all the wires that are on the engine. Unless you wanna but an ecm which I don;t think you wanna. Trust me on this. I work for a premeir mecury dealership !!

BE very carefull what you buy from e-Bay

If you want the merc replacements you could call Mel Riggs at Riggs marine. 920 872 2728

Not sure how close you are to him but he ships and might have them in stock

If I remember right, his original issue was needing a higher amperage alternator which if he goes back with Merc parts he'll be in the same boat (pardon the pun). The charge rate of the alternator shouldn't have any effect on an ECM. Now, if the field or sense wires aren't connected (as in the 1-wire setup) maybe that will have some effect. I put 1-wires on my old carbed motors. They are just self-exciting units.

dbelectric on the web. Send him a pic and maybe he can match it or upgrade your units. He will be way cheaper and has good quality.

Take thos alternators that you have to a good rebuilder. Ask them to rewind them for more output. I have had this done in the past.