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battery terminal melted...... please help...

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  • battery terminal melted...... please help...

    After sitting all winter, i finally got around to doing some work on my 18 ft Critchfield bay boat w/ 1988 Johnson 88hp spl yesterday. Changed lower unit oil, checked spark plugs, fuel, connections and fuses and it all checked out good. considering its age.
    Charged batteries all night, disconnected charger from batteries and connected them to outboard. put the ears and turned on water primed fuel bulb and tried cranking her up. Nothing.....tried a couple of times and would only turn on for a couple of seconds and cut off. visually checked all connectors nothing looked out of whack. so i tried again, and again "on and off". but this time i saw smoke coming from my side and noticed a pos battery terminal with the cable laying on the floor; it had melted off the battery ????????

    i stopped, turned off and disconnected everything. checked all fuses again, flywheel turned normally, power packs, harnesses, solenoid look good and all bolts on tight. nothing loose. since i was using the old battery that came with boat when purchased in 2007, i thought it had just gone bad, and swapped for a new one i had for spare/ emergency.

    same on and off for a couple of tries and the same thing happened to that battery......terminal melted off......

    Now, I've replaced the ignition switch (per seloc repair manual for my model engine), and added led lights, electric horn and trolling motor (has its own independent battery) last year and it all ran fine with no issues in the past.

    Before i take it to mechanics and have to spend tons of money for something that might be simple or trivial that i may have missed, and aside from being out two batteries and having to replace them, anyone have any suggestions?

  • #2
    Re: battery terminal melted...... please help...

    Originally posted by juancgar View Post
    After sitting all winter, i finally got around to doing some work on my 18 ft Critchfield bay boat w/ 1988 Johnson 88hp spl yesterday. Changed lower unit oil, checked spark plugs, fuel, connections and fuses and it all checked out good. considering its age.
    Charged batteries all night, disconnected charger from batteries and connected them to outboard. put the ears and turned on water primed fuel bulb and tried cranking her up. Nothing.....tried a couple of times and would only turn on for a couple of seconds and cut off. visually checked all connectors nothing looked out of whack. so i tried again, and again "on and off". but this time i saw smoke coming from my side and noticed a pos battery terminal with the cable laying on the floor; it had melted off the battery ????????

    i stopped, turned off and disconnected everything. checked all fuses again, flywheel turned normally, power packs, harnesses, solenoid look good and all bolts on tight. nothing loose. since i was using the old battery that came with boat when purchased in 2007, i thought it had just gone bad, and swapped for a new one i had for spare/ emergency.

    same on and off for a couple of tries and the same thing happened to that battery......terminal melted off......

    Now, I've replaced the ignition switch (per seloc repair manual for my model engine), and added led lights, electric horn and trolling motor (has its own independent battery) last year and it all ran fine with no issues in the past.

    Before i take it to mechanics and have to spend tons of money for something that might be simple or trivial that i may have missed, and aside from being out two batteries and having to replace them, anyone have any suggestions?
    Ayuh,.... Welcome Aboard,..... Electricity + Resistance = Heat,....
    The positive terminal connector on the battery was corroded,...

    Just Lookin' at electrical connections just Ain't good enough,....

    Ya gotta have Shiny Metal Clean connections, I'm guessin' several of yer's, 'tween the battery, through the startin' circuit to the Starter are Corroded under the fasteners,...

    Disconnect at each point, sandpaper Clean it, reassemble, tighten, 'n then Grease 'em to keep 'em that way,...

    'n Don't forget the lowly often forgotten Grounds,... All of 'em, Both ends of each wire,...

    Clean it up, get another battery, 'n I'm bettin' she'll spin like a new top,....
    Last edited by Bondo; March 21st, 2014, 03:11 PM.

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    • #3
      Re: battery terminal melted...... please help...

      Sounds like the starter is locked up and causing a short. Or as bondo has said its some very bad connections.
      Bad Dog

      If it aint broke your not having enough fun

      my 1988 Riviera Cruzer pontoon rebuild
      https://forums.iboats.com/showthread.php?t=526820

      my pontoon trailer rebuild

      https://forums.iboats.com/forum/boat-...railer-rebuild

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      • #4
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        Re: battery terminal melted...... please help...

        Thanks for the reply.
        Ill clean all connectors and replace wires if needed next week end. It couldn't be the starter though, it was moving at the turn of the key.

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