new alternator, totally different

[jsparks]

1999 x-star w/350 LT-1, bought new alt. and when we got it, the wiring set up is different? Old alt. had 3 bolt and nut, slip on & tighten up!!! simple enough. Black, orange, and purple. New alt. which I did call and check with company is the new equivalent to the old. has one bolt and nut, then coming from back of alt. has a purple wire and a red wire??? do I just match up and go or is there a trick. just want to make sure before I screw something up.

[jsparks]

how bout this, can someone tell me which wires on the boat are the battery sense wire and which is ignition switch wire

[Gofast]

Sorry, mine was like that too. I traced mine back from the altenator. I went from the 50 amp to a 110 Amp Marine altenator and also added a battery and the borg relay from Diesels old post. Had to modify the mount accept the larger housing of the new alt.

This post is for moral support only......

[jsparks]

tried to install yesterday and new alt casing is just simply too big to fit mounting brackets. lacks about an inch!!!! how do you modify mounting brackets for this

[Gofast]

I had to grind to get clearance for the casing and I believe I had to weld an area to extend on of the mounting holes. I searched the old PC and could not find any of the pics when I modified the bracket. Current bracket looks factory. If I can get pics of it tonight or tomorrow I'll post so maybe you can see the differance now.

Rob

[BriEOD]

Last year I replaced my alternator to accommodate a substantial stereo upgrade. When the new one came the wires matched up fine and the bolt pattern as well. However, there was a ridge/nub on the housing of the alternator that prevented me from sliding the unit left/right to put the belt on and than tighten. I ended up taking an angle grinder to it and made it fit. The alternator has worked well.

Here are some photos of my OLD alternator.

http://www.mastercraft.com/teamtalk/showthread.php?t=30184&page=2