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Old 21 August 2014, 01:18   #1
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speed tubes

Hello .
I have been assemble a futurs mk11 . I have a manual for it on how to put it together it also has a built in pressure gauge for the tubes . The thing is how much pressure do i put in the speed tubes and the tube in the bottom of the boat . It does not say in the book .
regards chris
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Old 21 August 2014, 01:40   #2
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the same as the main tubes only the floor is higher pressure everything else is 2.5 I think
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Old 21 August 2014, 01:50   #3
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thanks .
when using the gauge which fit the main tubes when thats green its got 5 psi in them ,
regards chris
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Old 21 August 2014, 03:41   #4
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Ironically my Futura Sport with speed tubes doesn't show a pressure on the transom for them, yet it does for the middle floor 2.2mb (3.1psi), and the main tubes at 2.4mb (3.4psi). I set the speed tubes to around 3-3.5psi as they never see the sun, but they do get to feel the cold water.
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Old 25 August 2014, 02:41   #5
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Thanks for you message the pressure is 3.4 main and 3.1 hull .
Regards chris
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