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  1. #1

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    Getting Less Water & More Air Into the Hull

    The 1997 XP & the 1998 & 1999 XP-Lís had two air intake holes with vent tubes and rubber grommets located under the hood in the front hinge area. The rubber grommets donít fit tight against the hood so when the nose of the hull drops down these skiís can take on a lot of water. Sea-Doo addressed this problem starting with the 2000 XP by leaving these vents out and putting an extra set of vents under the seat.

    For the 97 to 99 XPís you can block these vents off completely by installing some solid circles cut out of Plexiglas or some other material in the rubber grommet.

    Blocking the front vent holes and not adding any other vents is probably fine for a stock or mildly modified ski, but for safety reasons (gas fumes) and to get as much air as possible to the motor it is probably better to add some new air vents when blocking these holes.

    One way to reduce water coming in the front vents and still keep them open for air is to use some simple rubber adaptors as vent tube extenders. These adaptors fit perfectly into the stock rubber grommet and they extend up into the holes on the bottom side of the hood and seal off against the hood.

    Fernco Joint Sealant Company - Part # 22U-205 - http://www.fernco.com

    You can find these in the plumbing department at Home Depot & Lowes, for approx. $9.00 each.


    A good way to add even more air to a XP-L, or any other ski for that matter, is to drill some new holes and cover them with Flow-Rite vent covers. The Flow-Rite is covered with material that repels water, yet passes air right through. For more information go to Starting Line Products - http://www.slp.cc - and search for Flow-Rite.

    Hereís some information on the Flow-Rite vent covers that I have used. Many other sizes and types are available.

    Part #14-189 and 14-194: These are made using a rubber flange to attach the Flow-Riteô to the surface that it is being installed in. This rubber flange conforms itself to a wide variety of contoured, shaped and textured surfaces for a universal mounting system.

    Part #14-197: Designed for ease of installation on flat or nearly flat surfaces. It requires a 2 1/2" size hole saw which is readily available from any hardware store. Installation is a snap: hole saw the hole, debur the edges, clean hole saw shavings and snap Flow-Riteô into place.

    Part #14-258: This is a very easy way to add a large air vent to the XP-L without drilling any new holes. Remove the rubber plug under the seat, leaving a 4.500Ē diameter hole in the hull and just snap this Flow-Rite into the hole.

    Dan (drb)
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	Front Vent Tube Extenders 97 XP & 98 & 99 XP-L pic 1 R1.jpg 
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Name:	Front Vent Tube Extender pic 2 R1.jpg 
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Name:	Fow-Rite Part #14-194 or 14-189 R1.jpg 
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  2. #2

    Join Date
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    some more pics
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	Rubber Plug Removed - 4.500 Diameter Hole pic 1 R1.jpg 
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Name:	Flow-Rite # 14-258 to be installed pic 1 R1.jpg 
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  3. #3
    I picked up some of the tube exterders today at Home Depot. It looks like you put them in with the tapered side down. How far did you leave them sticking out of the top?

    Looks like they will work great though.

    Thanks.

  4. #4

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    Yes tapered side down. I leave them sticking out just far enough to hit the hood when I'm closing it. The hood will push them in the rest of the way.


    Dan

  5. #5

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    Jul 2007
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    PDX - Oregon
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    This is a good find... thanks Dan. What did you do with the rear hoses, leave them pointing to the rear of the boat, or wrap them around front like the newer models?

  6. #6

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    Quote Originally Posted by pdxrealtor View Post
    This is a good find... thanks Dan. What did you do with the rear hoses, leave them pointing to the rear of the boat, or wrap them around front like the newer models?


    I didn't change anything on the rear hoses.

    Dan (drb)

  7. #7
    PiMPNXP's Avatar
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    Can you post pictures of the rest of the ski and engine?

  8. #8

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    Quote Originally Posted by PiMPNXP View Post
    Can you post pictures of the rest of the ski and engine?
    Do a user name search for DRB, post started by. He has some nice pics of the motor, not installed though.

  9. #9

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    Quote Originally Posted by PiMPNXP View Post
    Can you post pictures of the rest of the ski and engine?

    http://www.picturetrail.com/gallery/...76&uid=8310876



    Dan (drb)

  10. #10
    PiMPNXP's Avatar
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    nice ski! Thanks for the link...

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