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Thread: Screw Snap Replacement?

  1. #1
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    Screw Snap Replacement?

    I am in the process of replacing the screw snaps on my boat what sealant should be used in the holes while screwing the new ones in?

  2. #2
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    Silicone has always worked fine for me.

    1971 Donzi 18' 2+3
    1985 Eliminator 23' Daytona Offshore - Kevlar hull
    1988 23' Donzi CC F-23 with 250HP EFI Mercury OB
    1989 28' Team Warlock Offshore - single 548CID/600HP
    1990 23' Warlock Offshore - single 525HP
    Bill from Denison, TX - Lake Texoma

  3. #3
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    Just be careful when using a sealant on them. They will strip out the hole real easy.
    A winner is just a loser that got up and did it one more time.
    1959 Biesemeyer - 4pt Hydro Drag - 2013 ACBS Winner - Best Race Boat
    1967 Nova Marine - SuperNova24 - ACBS Winner - 2012 Best Race Boat - 2016 Peoples Choice & Best Non Wood
    1972 John Allmand - Nova 19
    1972 John Allmand - Nova19 (#2)
    1982 PolarKraft -Jonboat - Crab Killer

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    Beyond sealant to Mark's point, I know some shops that actually drill and tap the fiberglass, rather than using a standard screw.
    "I don't have time to get into it, but he went through a lot." -Pulp Fiction

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    I have seen two different length screws on snaps with a slight difference in how much thread was on the screws. Since you will be replacing the snaps, you will probably not need to countersink the gelcoat but it is a good procedure any time self tapping screws are going into fiberglass to prevent the surface gelcoat from fracturing.

    1971 Donzi 18' 2+3
    1985 Eliminator 23' Daytona Offshore - Kevlar hull
    1988 23' Donzi CC F-23 with 250HP EFI Mercury OB
    1989 28' Team Warlock Offshore - single 548CID/600HP
    1990 23' Warlock Offshore - single 525HP
    Bill from Denison, TX - Lake Texoma

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    Thanks for all the response. I am just replacing old with new but did chamfer all of the holes with the tip of a philips bit in my drill. I also bought 1/2" long screw to replace the 3/8" ones so I make sure they get a little more bite.

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    Cant do it everywhere but where possible I use machinist screws and a nut. For sealant used the above water line version of the 5200 sealant think its 4200
    Scars are tatoo's of the fearless

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    I fight with the snaps around my cockpit when I put the cover on or take it off. Always have to push or pull from different directions and I even ripped the cover. I assumed it's because they're no longer round. Same thing holds true for the back seat cushions. Don't you need to replace the snaps on the cover and/or cushions also?

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    Quote Originally Posted by SKnies View Post
    I fight with the snaps around my cockpit when I put the cover on or take it off. Always have to push or pull from different directions and I even ripped the cover. I assumed it's because they're no longer round. Same thing holds true for the back seat cushions. Don't you need to replace the snaps on the cover and/or cushions also?

    Have you you vaselined the snaps? Night and day when done.
    "I don't have time to get into it, but he went through a lot." -Pulp Fiction

  10. #10
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    If you look at snaps on eBay, you'll find a two ended tool for removing covers etc.
    It simply separates the snap parts and removes any stress from the cover.

    http://www.ebay.com/itm/Top-Snapper-...hXmkIM&vxp=mtr
    George Carter
    Central Florida
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    Professor Ian Plimer, Adilaide and Melbourne Universities

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    Same snaps on seat cushions and cover for past 19 yrs. without issue. Never lubed snaps although 18C has been stored indoors for those 19 yrs.

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    Quote Originally Posted by gcarter View Post
    If you look at snaps on eBay, you'll find a two ended tool for removing covers etc.
    It simply separates the snap parts and removes any stress from the cover.

    http://www.ebay.com/itm/Top-Snapper-...hXmkIM&vxp=mtr
    Thank you George! I'm going to get that tool. I've been boating all my life, but recently got my 1st Donzi...a '96 22 Classic. I learned about this site and have garnered tons of good information. Very cool!

  13. #13
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    Quote Originally Posted by Ghost View Post
    Have you you vaselined the snaps? Night and day when done.
    I need to try this; it sounds like a great way to deal with snaps that don't want to go on or come off easily.

    1971 Donzi 18' 2+3
    1985 Eliminator 23' Daytona Offshore - Kevlar hull
    1988 23' Donzi CC F-23 with 250HP EFI Mercury OB
    1989 28' Team Warlock Offshore - single 548CID/600HP
    1990 23' Warlock Offshore - single 525HP
    Bill from Denison, TX - Lake Texoma

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    Quote Originally Posted by Conquistador_del_mar View Post
    I need to try this; it sounds like a great way to deal with snaps that don't want to go on or come off easily.
    The environment out here is a killer on everything , snaps included. Nothing tries your patience like a few snaps on the cover that are virtually seized in place.

    Your marine supply store might carry small tubes of snap and zipper lube . Failing that even spray lube/oil will work but vaseline is the old go to .

    And it's true , the difference afterwards IS like night and day .
    Just because something's old doesn't mean you throw it away !

  15. #15
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    Quote Originally Posted by Ghost View Post
    Have you you vaselined the snaps? Night and day when done.
    Thank you! I'll do that. Sure as heck beats replacing them if I don't need to.

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