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  1. #1
    Member
    Join Date
    May 2017
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    Clarksville TN
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    191

    May have a problem with my 70 hp. Lead wire caught fire.

    Everyone,

    I was redoing my aluminum boat with hyrdo turf. While I was doing this the bottom of the boat was bare aluminum. I had disconnected some wires from my controls in order to remove the panels to hyrdo turf them. Well I was reinstalling the side panel when I noticed the floor spark. I noticed a burning smell and looked back and saw this Lead wire bring orange and the plastic cover caught on fire. the wire I am referring to is #25. I believe the power block was possibly touching the floor so there was a current. I am unsure why exactly that happened. Also when I removed the cover to that damper, the lead on the damper side was broken. How hard is that to replace. Thanks for your time.



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  2. Member
    Join Date
    Jun 2004
    Location
    Hot Springs, AR
    Posts
    3,620
    #2
    It's going to be difficult for anyone to help based on the fact you posted a partial schematic for a motor you only described as a 70hp. Yamaha has made a few different 70hp engines over the years. A year and model of the motor would be helpful along with an actual photo of the damage.

  3. Member
    Join Date
    Nov 2004
    Location
    Columbus, Indiana
    Posts
    4,234
    #3
    That is a ground wire. How did it catch fire?

  4. Member
    Join Date
    May 2017
    Location
    Clarksville TN
    Posts
    191
    #4
    Sorry I was not more specific. Model is C70TLRY 2 stroke. Looks like the part of the ground wire under the bolt head was already broken when I pulled that cover off. You can tell it was pressed against the motor. Probably when someone was tightening down the nut.

  5. Member
    Join Date
    Oct 2017
    Location
    California
    Posts
    69
    #5
    Inspect every wire and reinsulate or replace.

  6. Member marinetechnician's Avatar
    Join Date
    Jan 2011
    Location
    maine
    Posts
    2,022
    #6
    That's a bonding wire.
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