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  • Positive Battery Terminal Getting Hot...

    I haven't started my boat in a few months and tried to today... On the first 5 or so cranks it seemed to crank well but didn't start, after those 5 or so cranks it began to slowly die off and got slower and slower as if the battery was getting weaker... It was fully charged. Anyways, I checked the battery and the positive terminal got very hot.

    Could this be the starter or in need of a new positive cable? I just stopped trying to start it once I realized the battery got hot and because it was having a hard time cranking over, it seemed sluggish.

    I may try to post a video on exactly whats happening so you guys can get a better understanding of the situation..

    BTW its a 1984 Merc Blackmax 150hp Outboard

    Thanks,

    -Christian

  • #2
    Re: Positive Battery Terminal Getting Hot...

    Remove and clean your battery terminals, reinstall, charge your battery and try again.
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    • #3
      Re: Positive Battery Terminal Getting Hot...

      Yes you have a bad connection.
      Bad Dog

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      • #4
        Re: Positive Battery Terminal Getting Hot...

        And yes, the cable itself could be corroded under the insulation.

        You could try using a jumper cable, and connecting directly from battery to the starter.
        Medford, WI


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        • #5
          Re: Positive Battery Terminal Getting Hot...

          Heat in any electrical connection is a result of a poor connection. Same thing will happen with wiring in your home if you have a loose connection. High current draw will expose the problem quickly.

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          • #6
            Re: Positive Battery Terminal Getting Hot...

            I'll try replacing the cable 1st and let you all know if it works or not...

            thanks

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            • #7
              Re: Positive Battery Terminal Getting Hot...

              Sounds like bad connection. Try cleaning as stated above and when you put the nut on the terminal post really crank it down, using a wrench or pliers. Sometimes you can finger tighten them, other times finger tightening causes your exact problem.

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              • #8
                Re: Positive Battery Terminal Getting Hot...

                Originally posted by reeldreamer View Post
                I'll try replacing the cable 1st and let you all know if it works or not...

                thanks
                Ayuh,.... Just Clean the battery connectors to shiny clean metal, 'n try it 1st,...

                Heat = Resistance = dirty connections,....

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                • #9
                  Re: Positive Battery Terminal Getting Hot...

                  I still have yet to do anything (been busy). I didn't mention it in the post above that I did try it on 3 different batteries... so I know the battery terminals aren't the issue but will check the connections by the starter, clean the cables, and if that doesn't work I'll buy a new cable.

                  Thanks again

                  -Christian

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                  • #10
                    Re: Positive Battery Terminal Getting Hot...

                    Originally posted by reeldreamer View Post
                    I still have yet to do anything (been busy). I didn't mention it in the post above that I did try it on 3 different batteries... so I know the battery terminals aren't the issue but will check the connections by the starter, clean the cables, and if that doesn't work I'll buy a new cable.

                    Thanks again

                    -Christian
                    Ayuh,.... Changin' batteries does Not necessarily equate to Cleanin' the terminals,....

                    sandpaper both the post, 'n the cable ends,....

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                    • #11
                      Re: Positive Battery Terminal Getting Hot...

                      Are you in a salt water area ??

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                      • #12
                        Re: Positive Battery Terminal Getting Hot...

                        If the terminal at the battery is getting hot then the issue is with that terminal not the starter connection. If the starter connection was a problem then the starter connector would be getting hot. It could be the cable to clamp connection and not the clamp to battery connection that is the problem.

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                        • #13
                          Re: Positive Battery Terminal Getting Hot...

                          Gotcha, I cleaned all connections and bought a new battery cable.... this time after trying to start it the cables got barely warm and the starter wouldn't crank over. You could see it trying to engage but it wouldn't crank (the batteries were charged). Would that be a sign of a new starter or solenoid?

                          Thanks,

                          -Christian

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                          • #14
                            Re: Positive Battery Terminal Getting Hot...

                            Originally posted by boobie View Post
                            Are you in a salt water area ??
                            It has never been in saltwater... I'm about a half hr from the coast.

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                            • #15
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                              Re: Positive Battery Terminal Getting Hot...

                              Originally posted by reeldreamer View Post
                              Gotcha, I cleaned all connections and bought a new battery cable.... this time after trying to start it the cables got barely warm and the starter wouldn't crank over. You could see it trying to engage but it wouldn't crank (the batteries were charged). Would that be a sign of a new starter or solenoid?

                              Thanks,

                              -Christian
                              Think now you have a real bad connection (barely warm and will not crank) or your starter windings burned.
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