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Old 23 May 2015, 11:13   #1
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Thrust board replacement

1981 mk2 C: wood floor is in generally good shape...but the glued in thrust board was toast. The board is out and available as a template. Any tips on re installing the board...Thinking I need to cut ney hypalon sections to add mounts to the tubes???
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Old 26 May 2015, 22:44   #2
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bump?
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Old 27 May 2015, 08:09   #3
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I don't know much about this, but I can tell you that the position and tension on that thrust board will be very important because when the floorboards are in place up against the resistance that the thrust board provides, they stretch out the fabric on the bottom of the boat giving the hull its proper shape (along with proper keel inflation). If that doesn't happen - if the floor isn't stretched out enough with enough tension, the hull can get a hook in it causing horrible, nose down performance with acceleration.
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Old 27 May 2015, 08:48   #4
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Good morning Projectile,
Thank you for that info. That helps.
Cheers
Mike
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Old 27 May 2015, 13:16   #5
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Do you have any photos dizzyspots ..it may help others with what you are asking about. ?

Perhaps you got few answers initially because of the term "Thrust Board" ?

I have three SIBS but no idea what one is..perhaps its just a different term for the wooden Transom ? If it is..then perhaps others can offer some advice. ?

I sincerely hope you find what you need .. regardless of my ignorance of what a thrust board is
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Old 27 May 2015, 13:26   #6
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sincerely hope you find what you need .. regardless of my ignorance of what a thrust board is



See the board to towards the bow? It is glued in place. That is a thrust board. They often rot due to being left in the trailer with water inside the boat, or they just simply come unglued over time.
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Old 27 May 2015, 13:56   #7
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Thanks 888..that is exactly what I need help on...I can see where it would be critical for forming a proper inflatable keel. ...I have the old rotten board to use as a pattern....plan is to glue a new board in place with tubes inflated....then reinstall the floor...am I on the right track??
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Old 27 May 2015, 14:17   #8
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Thanks 888..that is exactly what I need help on...I can see where it would be critical for forming a proper inflatable keel. ...I have the old rotten board to use as a pattern....plan is to glue a new board in place with tubes inflated....then reinstall the floor...am I on the right track??
You completely are!

The floor needs to be unglued to properly install the thrustboard.

REPLACEMENT MUST BE EXACT TO THE ORIGINAL.

Too far forward or too far backward will alter the floorboard stretch (referred to as "GRIP" by Zodiac). The tolerance for this is about +/- 15mm, depending on which model boat it is.
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Old 27 May 2015, 14:28   #9
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Thanks for the info on the thrust board guys.. I see what it is now.. my inflatable dont have them. It was worth asking too..as you got a good response to your question dizzyspots
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Old 27 May 2015, 15:10   #10
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I had a 1980s Mark 2C, and it didn't have a board like that.
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