Holes in the transom question, cp tunnel
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Holes in the transom question, cp tunnel

  1. #1
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    Default Holes in the transom question, cp tunnel

    Picked up a cp tunnel project, trying to figure out what all the holes in the transom were for.
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    I do all my own stunts. white tortilla's Avatar
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    The jet goes in the big hole in the center.

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    Quote Originally Posted by Izzy View Post
    Picked up a cp tunnel project, trying to figure out what all the holes in the transom were for.
    The one's on the bottom are race flappers..the ones in the middle are for Calgo steering , the ones on top are for your water bypass, or exit

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    Race flappers?

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    Quote Originally Posted by Izzy View Post
    Race flappers?
    s
    Yea that's what I call them....Look at A drag boat ..or circle boat..as water comes in it's a one way Flap out
    I would not leave that boat overnight in the water

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    Gotcha, looks like they're referred to as a j drain.

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    Senior Member Mouzer's Avatar
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    Quote Originally Posted by white tortilla View Post
    The jet goes in the big hole in the center.

    that was good......................

    MADE ME LAUGH AND I DONT LAUGH VERY OFTON.......


    ''''''OWNER OF THE BIG WHITE WOLF....,,,
    ,,,

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    Senior Member jetjunky's Avatar
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    are you planning on going drag boat racing with it? How familiar are you with jet boats and their operation in general?

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    Yes, I'm very familiar with jet boats, no, I'm not planning on racing this boat, have just never seen a "j drain/race flapper" before, should I have? I guess my question should have been "what are the two outer holes right above the tunnel for" as I already knew what all the others holes were for

  12. #10
    Senior Member BGMAN's Avatar
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    Looks like the pump was set back. Hard to say on all the holes but if it had a AT pump then it could of had 2 water feed lines, one on each side of the suction. The 2 holes above the tunnels could of been the water feed lines going through to the transom to feed the engine.

    At this point it really doesn't matter what they were for. If your not needing them, then just have them filled.

  13. #11
    Senior Member jetjunky's Avatar
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    I asked because that hull is generally considered a race only type hull and can be a bit sketchy for general river/lake play use do to the outer shape of the front of the sponsons and shallow, tapered keel up front. There's been several threads with questions and concerns about the safety of the dual application. The way you posed your initial question had me wonder how much experience you had with jets etc. If your plan is to use as a play boat may I seriously recommend researching the threads regarding their inherent issues for that application if your not familiar with them. The J-drains are quite common on these low profile hulls that are subject to swamping easily. They are also commonly leaky little bastards and require constant monitoring to insure their good working condition, a twig or other foreign matter doesn't hold them open potentially sinking your new hotrod. There's a guy in the v-drive section (Dimarco-21?) that mfg.'s and sells a nice billet alum. retro-fit kit for them as well. I'm just loookin out for ya. Good luck with your new hotrod project. Looks like a fun deal.

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    thanks for everyone's input, I wanted to know what those two outer holes were for before I filled them, had never seen them before. I've read all the threads on this hull and am taking all information into consideration while planning this build.

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    Senior Member jetjunky's Avatar
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    kuul deal. I look forward to following your progress, I hope you will post as you progress. That should be a fun hotrod. I have always like the style of those hulls.

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    Senior Member bp298's Avatar
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    Quote Originally Posted by Izzy View Post
    thanks for everyone's input, I wanted to know what those two outer holes were for before I filled them, had never seen them before. I've read all the threads on this hull and am taking all information into consideration while planning this build.
    did you drag that thing out of scott's yard???

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