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Chinook Uni no longer compatible w/ Streamlined Extension

 
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rigatoni



Joined: 25 Feb 1999
Posts: 494

PostPosted: Fri Aug 13, 2021 12:48 pm    Post subject: Chinook Uni no longer compatible w/ Streamlined Extension Reply with quote

I've been using Chinook Universal with Streamlined mast extension for years. Recently replaced the Chinook universal and strangely it no longer is compatible with the Streamlined extension. The washer inside the extension where the pulleys attach interferes with the part of the of Universal that inserts into the extension. One of the buttons is able to pop thru the hole on the side of the extension but the other one does not.

anyone else have a similar experience?
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dhmark



Joined: 04 Sep 2007
Posts: 364

PostPosted: Fri Aug 13, 2021 1:20 pm    Post subject: Reply with quote

Had similar problem years ago with compatibility of Windsurfing Hawaii and Chinook, the cup needs to be inset from round to accommodate any nuts on inside of extension. Seems like you need to replace the Chinook cup with a Streamlined cup, pictures show that it is extremely shaped from round to have a lot of space. US cup bases wiggle around inside most extensions, the Streamlined one must wiggle around a lot unless it has otherwise very tight tolerances. Maybe Chinook has some old style cups lying around that they would sell to you. I have found it difficult to remove cups, they are stuck on pretty well.
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dllee



Joined: 03 Jul 2009
Posts: 5105
Location: East Bay

PostPosted: Fri Aug 13, 2021 2:07 pm    Post subject: Reply with quote

Sometimes, if one pops thru, flip it over and both pop in.
Sometimes, sand a bit off of the basecup.
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manuel



Joined: 08 Oct 2007
Posts: 1126

PostPosted: Mon Aug 16, 2021 6:03 pm    Post subject: Reply with quote

Photos ?
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*NEW* - Manu's Windsurfing Blog, The STORE!
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techno900



Joined: 28 Mar 2001
Posts: 3976

PostPosted: Tue Aug 17, 2021 7:57 am    Post subject: Reply with quote

Using universals with different extensions can be a problem when they seem to match. I found out the hard way when I had a separation on a 4.0 day because the pins, even though they protruded through the hole in the extension, didn't protrude far enough and didn't hold. I drilled the holes bigger to accommodate the fatter pins. Luckily, the wind that day was on shore which is where my board wound up. Blowing away too fast to catch and only 100 yds. to shore.
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