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Old 11 September 2009, 15:45   #11
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From the manual:

Tubes 3.6psi
Floor 11-12psi
Keel 6.4psi

Sounds like your floor and keel are way under inflated. Get a decent stirrup pump with a pressure gauge. The Quicksilver one is good (I've just bought another one because mine is going with the Quicksilver that I've just sold!).
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Old 11 September 2009, 16:15   #12
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Hmm. From my Seago manual now I look more closely...tubes 2.25psi...air floor 3psi...no mention of the keel
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Old 11 September 2009, 16:18   #13
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thanks for that john, just to check thats the manual for the quicksilver not the bombard yes?
Next time out i will use your figures and let you all know how it goes.
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Old 11 September 2009, 17:18   #14
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Yes, that's direct from the Quicksilver 340 Airdeck manual. The pressures for the Bombard are much the same though. The main rule of thumb seems to be that these air floors need to be pumped up much more than you would think!
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Old 12 September 2009, 10:50   #15
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No matter how well you inflate the floor to it's correct working pressure, will still rock a bit, it's the nature of the little beast, portability versus perfect performer as compared to wooden or aluminum floors on same size sibs.

If your Tohatsu engine is not splashing water against transom do to improper transom height for this engine use, place engine thrust rod trim angle in a position so that the anticav plate is at 90 with respect of bottom hull and boat is paralell to water when on full plane. Place weight towards middle/bow.

Get yourself a good brand pressure gauge, and inflate sib as stated by the manual.

Happy Sibbing
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