Rail Kit installation
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Rail Kit installation

  1. #1
    Senior Member holorinhal's Avatar
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    Default Rail Kit installation

    I remember reading in a thread about how to mount the rails ,But I cant find it.
    I thought I remember socal saying to mount paralell to the sringers and cut the plates to achieve the proper angle of the engine in relation to the pump?
    Should the rails be flush with the top of the stringers,or set down a certain amount?

    I am using a 1/4"x2" flat bar on the outside of the sringer and I drilled the holes in the rail with a drill press, but how do You Guys go about drilling the flat bar to insure that the holes line up. I know, measure the same distances, but if You are off just by a hair when drilling thru the stringer, the bolts will miss. Should I drill the stringer with the rail and use the stringer hole to mark the back side of the flat bar?...Hal

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    Senior Member propless's Avatar
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    When we did my rail kit we drilled the outer plates at the same time as the angled rails (clamped them together).

    As far as where to put the rails, I put mine about 1/4 in below the top of the stringers (just because it looked good) and trimmed the plates to get the motor where it belonged, like you said.

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    Senior Member DuaneHTP's Avatar
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    Propless is right, the rails look better about 1/4" below being flush with the rails. Put your holes in the outside plates nice and even. Then clamp them and the rails in the boat and drill through the stringers to mark the rails and finish on a drill press. Makes a nice clean job. NOTE, make sure that the holes are hitting the rails about center or you may get too close to the upper angle and not be able to put a nut on the bolts.

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    Amber Racing Services BUSBY's Avatar
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    what they said (Jeff & Duane)

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    Senior Member tahitijet's Avatar
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    like the others said i have mounted the ones i've done parrallel to the top of the stringer but down on the stringer about 1/4" (just before the stringer starts to roll at the top). cut the plates to get the angle. I don't think it looks right with angled rails.

    to mark the holes i clamp the rail to the stringer (with holes predrilled in the rail) then drill through holes in the rail and through the stringer. then center the outter plate so the bolts will come out dead center, clamp it all together and transfer punch the outter rail, remove and drill.

  8. #6
    Senior Member jetboatperformance's Avatar
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    Kind of like said above.. We "mock it up" ,cut it , fit it , "C" clamp it , mark/scribe it, then remove, precision drill everything and reassemble as a "unit" then drop it back in and secure the whole thing in place ! Tom

  9. #7
    Senior Member flat screwd's Avatar
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    + 1 as everybody else said but drill half way through the stringer on each side and let the drill meet in the middle and then go all the way through.

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    does anyone resin coat the holes or do you leave them exposed?

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    Senior Member LuckyDaze's Avatar
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    I use silicone instead of coating them with resin because of all the vibration I don't have to worry about the silicone cracking or flaking out of the hole. Keeps a good seal too.

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    Senior Member lbhsbz's Avatar
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    As far as getting all the holes drilled in the right spot, I generally clamp everything together....angle/flat/flat/angle, then find a block or something to set up on the drill press as a guide. Then you've got the same hole pattern in everything, with very little measureing.

  13. #11
    I'm No Expert Shaun's Avatar
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    Seams like you would want to mount your rails as low as possible. The higher up they are the more leverage there is to break the glass that holds the stringers to the floor right? I mounted mine about 1/4" below the top of the stringer but i did this because i had too, if i went any lower the pan would hit the floor

  14. #12
    Senior Member moneysucker's Avatar
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    Quote Originally Posted by flat screwd View Post
    + 1 as everybody else said but drill half way through the stringer on each side and let the drill meet in the middle and then go all the way through.
    I was going to say this. This is how we drill for bolts on hangers and beam buckets. I would clamp the 2 sides on where you want them,them drill from each side on front and back holes, Bolt those 2 holes and do the rest the same way.
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    Amber Racing Services BUSBY's Avatar
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    Make sure you get your engine alignment correct ... mount your rails, then build your plates.




  16. #14
    Senior Member holorinhal's Avatar
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    Thank's Fella's for posting up all the info.
    Busby, those pics are great!....Hal

    I'm not here for a long time, I'm just here for a good time!
    If your not on the edge.......your taking up too much room......Drive it like you stole it!

    73 KONA Restoration http://www.performanceboats.com//showthread.php?t=10678
    '81 Spectra 20 Facelift http://www.performanceboats.com/user...-facelift.html

    18' Advantage http://www.performanceboats.com/jet-...k-project.html

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