Gobs of Silicone?

Discussion in 'General Discussion' started by Steve O, Nov 23, 2020.

  1. Steve O

    Steve O New Member

    5
    Aug 28, 2018
    280 Sea Ray Sundancer, 2014
    450 Mercuiser w/Bravo III Drives
    First time posting and apologize for any repetition.

    I have a 2014 Sundancer 280 and in the process of replacing my shifter or throttle cables. As I was pulling the old cable out, it got stuck in what I'm calling a "gob of silicone," I have no idea if there is a better way to explain this. The silicone is unreachable, therefore can't break it apart. So my question is - what is the purpose of the silicone and why is it covering most of the cables and wiring between the bilge and helm?

    There is another route that I can use for the cables that I am going to take that bypasses the glob of silicone.

    I'm just wondering what the purpose is and the importance of have so much silicone covering some wires and cables between the bilge and helm.

    Thanks

    Steve in Florida
     
  2. 370Dancer

    370Dancer Well-Known Member

    Oct 2, 2006
    Florida - Alabama
    1998 370 Sundancer
    380hp MAG MPI Gen VI with V drives
    That is to keep the engine room gases from showing up in your air conditioner in the cabin when the blower is pulling air from wherever it can, including cracks and bilges.
    A huge difference between 90's+ boats and any prior to that is the distinct effort to isolate what goes on in the engine room from what goes on in the cabin.
    My silicone "blob" was breached when the PO decided to run some stuff through that opening. When I got the boat, we could go for a cruise, come home, leave the A/C on, and the next morning, all you could smell in the salon was engine exhaust. Mercury, Sea Ray, Marine Max, and I finally discovered the hole where the silicone blob had been pulled away. It was at the side of the helm station, behind the sub woofer. At the recommendation of Mercury, we re-caulked it. Now, you can step into my quarters anytime, 17 years later, and it smells like.......nothing.
     
  3. Wylie_Tunes

    Wylie_Tunes Active Member

    849
    Oct 26, 2012
    Lake Wylie NC area
    N/A
    N/A
    Two issue with taking a different route. A) length. Cables may not reach if a different path is taken. B) whats explained above. The silicone is used to seal pass-thru's between the engine bay and any passenger area. So you would have to seal it much the same, gobs of silicone.
     
    Chris-380 likes this.
  4. Steve O

    Steve O New Member

    5
    Aug 28, 2018
    280 Sea Ray Sundancer, 2014
    450 Mercuiser w/Bravo III Drives

    Thank you 370Dancer. Finally an answer to the question I have been searching for. It now makes total sense why the blob of silicone is there. Needless to say, I won't be messing with the silicone, or if I do, make sure it's replaced. Again thank you 370Dancer.
     
  5. Steve O

    Steve O New Member

    5
    Aug 28, 2018
    280 Sea Ray Sundancer, 2014
    450 Mercuiser w/Bravo III Drives
    Totally understood and thank you. All makes sense.
     
  6. spikedaddy99

    spikedaddy99 Well-Known Member PLATINUM Sponsor

    Jun 11, 2008
    Prentice, Wi
    2005 500 DB
    QSM-11
    Funny thing is we ALL knew exactly what you meant. M
     

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