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  1. #1
    rpa101's Avatar
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    Boring nozzle to 87 mm

    In order to bore my nozzle out I removed the siphon tube . Now I'm wondering if I should reinstall it I . am planing to use a bilge pump and a duckbill drain . Do the tubes cause any performance loss ?


  2. #2
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    I would keep the siphon. They keep the hull much drier than an electric pump alone will. I wouldn't use the duckbill either.

  3. #3
    rpa101's Avatar
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    Is there anything that you would recommend instead of the duckbill ?

  4. #4
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by rpa101 View Post
    ... Do the tubes cause any performance loss ?
    None.

  5. #5
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by rpa101 View Post
    Is there anything that you would recommend instead of the duckbill ?
    The stock bilge siphon tube system. Locate the mesh suction screens right down in the lowest corners of the bilge, works quite well.

  6. #6
    rpa101's Avatar
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    Awesome thanks siphon tubes it is .
    i have read different ways of removing the tubes I used a little heat and a pare of vice grips with a slid hammer attachment worked great

  7. #7
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    Boring the nozzle was a little difficult first attempt was my lathe witch I tried holding the inner lip ,would of tried this if I had a spare one , I chickened out . Second attempt was the rotary table on the drill press with a milling bit this was the answer . Now to install the tube mine only had one should I drill for the second one ?

  8. #8
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by rpa101 View Post
    Boring the nozzle was a little difficult first attempt was my lathe witch I tried holding the inner lip ,would of tried this if I had a spare one , I chickened out . Second attempt was the rotary table on the drill press with a milling bit this was the answer . Now to install the tube mine only had one should I drill for the second one ?
    If you want to have dual siphons inside the hull, you will need two siphon tubes in the jet pump exit nozzle.

    And two pass-through nipples at the jet pump base.

    And two siphon elbows inside the hull, mounted high up. These have a tiny vacuum break hole to prevent back siphoning when the engine is off.

  9. #9
    rpa101's Avatar
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    Thanks for the info ran out to my part ski it has every thing to make two , so I'm going to drill for the second line . thanks agin for the help

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