Rail kit with subfloor?
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Rail kit with subfloor?

  1. #1
    Senior Member sandeggo's Avatar
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    Default Rail kit with subfloor?

    In my lil boat I have the 4 point mount that is lag bolted into the stringers. It has a subfloor that covers everything but the motor area. In order for me to make a rail kit for it, I know I need access to the back of the stringers, but I also like having the floor back there around the motor. An idea I have is to holesaw a hole big enough to get a stringer washer and nut on the backside of the stringer and re glassing the hole. What are some other ideas? I could rip out the subfloor, but I would want to reglass it back in. If i do rip it out, how do you cut it out clean where the subfloor meets the bottom of the boat towards the gunnel? Whats the way to make sure the bolts stay tight?

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    Senior Member jetboatperformance's Avatar
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    Quote Originally Posted by sandeggo View Post
    In my lil boat I have the 4 point mount that is lag bolted into the stringers. It has a subfloor that covers everything but the motor area. In order for me to make a rail kit for it, I know I need access to the back of the stringers, but I also like having the floor back there around the motor. An idea I have is to holesaw a hole big enough to get a stringer washer and nut on the backside of the stringer and re glassing the hole. What are some other ideas? I could rip out the subfloor, but I would want to reglass it back in. If i do rip it out, how do you cut it out clean where the subfloor meets the bottom of the boat towards the gunnel? Whats the way to make sure the bolts stay tight?
    Are you saying the subfloor on either side of your motor box "stringers" is laminated down to the tops of the stringers (motor box) ? versus floor pieces being removable ? and are the fasteners truly "lags" screws ? I would "indicate/locate " over the tops of the 4 individual mounts on the outboard sides of the stringers and make a small access hole there to use a thru bolt with a back up plate or stringer washers if thats the case Tom

  4. #3
    Senior Member sandeggo's Avatar
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    yea tom its laminated all but the motorbox. i dont know if the boat has full stringers or not. whole floor is flat except where the motor and pump are, which is recessed. and yes they are galvanized 3/8" lag bolts. they go into the top of the stringer. total of 2 per mount.

    kinda see it here
    theres about 2.5"-3" of stringer from the bottom of the boat to the top of the floor, so my guess is that it is just a "motor box" and not full stringers
    Last edited by sandeggo; 08-28-2009 at 09:40 AM.

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    Senior Member jetboatperformance's Avatar
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    Heres an example that may help , once saw an Old Glenco tri hull jet that had been rigged with lags hard to imagine that Schiada would have done that ??Tom

  7. #5
    Boat Nut sleekcrafter's Avatar
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    I've seen deck plate used for this too.

    Upper Midwest Power Boat Association
    DRAG BOAT RACING UMPBA #926


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    Senior Member DuaneHTP's Avatar
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    X2 on the deck plates. They work just fine, you still have your floor and you can get to the back side of the bolts if you ever need to tighten them.

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    Senior Member Futs's Avatar
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    Thats how i did my cruiser. drilled access holes and used deck plates to seal it off and keep the water out.
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  10. #8
    Senior Member sandeggo's Avatar
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    I didn't know they made handholes that small

  11. #9
    BRM
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    Quote Originally Posted by sandeggo View Post
    I didn't know they made handholes that small
    about the size of a tuna can

  12. #10
    burnt mexican incorprated mirrorimage's Avatar
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    Quote Originally Posted by Futs View Post
    Thats how i did my cruiser. drilled access holes and used deck plates to seal it off and keep the water out.
    i miss that boat tim!!!
    WHAT THE HELL WAS THAT !!! !

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