• If this is your first visit to the iboats.com Boating Forums, be sure to check out the FAQ. To post a question or comment, begin by signing up. To start viewing messages, select the forum that you want to visit from the selection below.
  • ALL iboats Forum Members and Guests:
    To show our appreciation for your participation in the Forums, we're offering an exclusive Forums-only discount good for an additional 5% off your iboats.com order for a limited time.
    To redeem, simply call our Customer Service Team at 800-914-1123 (Open M-F, 9am - 8pm Eastern Time) and mention the Forums 5% off discount. Offer excludes engines, trolling motors, and electronics.

Announcement

Announcement Module
Collapse

Help Tip: If you have a question that has not been answered to your satisfaction in the archives, it is always best to start a new thread of your own. By starting your own thread, you will receive the maximum number of views by forum members.

Below are some additional forum policies in hopes of all iboats members will follow, Thank you.

1. Please do not reply to old threads or hijack existing threads. Old threads of a technical nature are like a library book, Please do not write in them.

2. Old threads should be considered archives and used for reference only. Please do not reply to them.

3. Do not take over someone elseís thread (aka hijack) with your own question, even if it is similar. If you have a question that has not been covered to your satisfaction in the archives, it is always best to start a new thread of your own.

4. If you have a question for the original poster (OP) and the thread is over 30 days old, send the OP a PM, he may not even visit the forums any longer, or may not notice your question in the old thread.

5. By starting your own thread, you will receive the maximum number of views by forum helpers that may not even notice your question when itís posted at the end of someone elseís thread. And those answers will be specific to your particular issue.

6. Please do not post to threads that have been inactive for more than 3 months unless you are the original poster. We have very active forums and any thread that remains inactive for that long should be considered "dead". It is especially confusing when there is an entirely new question posted to an old thread.

7. Posting at the end of any thread is considered to be hijacking the original posters thread which in turn subjects the thread to be closed if it continues to happen thus not making it fair to the original poster in the future had for some reason he/she needed to return for additional information or provide an update of the problem solved which is always welcomed within a reasonable amount of time frame.

8. Please note that you should see a red banner pop up near the bottom of each inactive thread asking you not to reply to old threads. The Red banner will read: Please note this thread has been inactive for 90 days. For the best results, please start a new thread.

Thank you all in advance for doing your part in helping iboats run a smooth ship.

Additional forum rules linked below.
http://forums.iboats.com/forum-rules-guidelines-405/
See more
See less

1987 3.0L MerCruiser Alternator

Page Title Module
Move Remove Collapse
X
Conversation Detail Module
Collapse
  • Filter
  • Time
  • Show
Clear All
new posts


  • 1987 3.0L MerCruiser Alternator

    Tback of my alternator fell off.
    After looking at mercruiserparts.com I came up with 5 different possibilities they are all out dated, I cross referenced part numbers and iboats.com has a few to choose from starting at 168.99 to 201.80 they were Sierra 68 amp, Arco 105 amp & Mallory ? amp.
    I also found on ebay.com a Delco 110 amp that matches for 69.00.
    All alternators are marine, is there a reason I should not get the Delco?


  • #2
    Re: 1987 3.0L MerCruiser Alternator

    Why do you need such a big alternator for a 3.0L? You do realize that the bigger the alternator, the more HP it takes from the engine to run it.

    As long as the mounting for the alternator is the same, you can use the larger Delco, just be sure to use a larger orange wire to the starter. It is only 8 ga now, sized for the 50 - 65 amp range.
    Don S.

    sigpic

    Please, no PM's (Private Messages) regarding boat/engine problems.
    That is what the forums are for.
    Only forum/moderator issues will be answered in PM's.

    Comment



    • #3
      Re: 1987 3.0L MerCruiser Alternator

      Ok thanks the wire broke when it fell so I will have to change it anyway.
      6 ga should be enough right?
      How much of a differance would it make in the HP?
      Since the Sierra was 65 amp and the Arco was 105 amp I was not sure if it would make a big differance, as to the useage I dont evan have a radieo right now but if I can save $100.00 to $200.00 I think it would be worth it.

      Comment



      • #4
        Re: 1987 3.0L MerCruiser Alternator

        Take your alternator to your local starter/alternator/electric motor shop. They can probably fix your alternator cheaper than any dirt cheap off shore high amp alternator. And it will probably last longer ................ if you don't drop it.
        Don S.

        sigpic

        Please, no PM's (Private Messages) regarding boat/engine problems.
        That is what the forums are for.
        Only forum/moderator issues will be answered in PM's.

        Comment



        • #5
          Re: 1987 3.0L MerCruiser Alternator

          LOL
          I was going to take it to someone but two of the wires for the stator are broken and the rotor has been rubbing stator pretty bad I think was rebuilt before and not done right.
          I guess I need to add checking the bolts holding the alternator together to my winterizing list.

          Comment



          • #6
            Re: 1987 3.0L MerCruiser Alternator

            if it was the one from "DB ELECTRICAL" on ebay, they are local to me, and I am running that alternator on my 1988 3.0

            Comment



            • #7
              Re: 1987 3.0L MerCruiser Alternator

              Originally posted by jeremy_nash View Post
              if it was the one from "DB ELECTRICAL" on ebay, they are local to me, and I am running that alternator on my 1988 3.0
              Yes that is the one I ordered.
              Did you use the origanal wiring?

              Comment



              • #8
                Re: 1987 3.0L MerCruiser Alternator

                Originally posted by danielw71 View Post
                LOL
                I was going to take it to someone but two of the wires for the stator are broken and the rotor has been rubbing stator pretty bad I think was rebuilt before and not done right.
                I guess I need to add checking the bolts holding the alternator together to my winterizing list.
                Ok, then take it to a reputable rebuild shop so they can do it "right"!

                I'll bet there's more than one available.....
                ----------------------------------------------------------------------------------
                I use xxx oil and have never had a problem........
                This post was created with OpenSuSE x64 Linux!

                Comment

                Working...
                X