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Old 28 January 2012, 12:57   #11
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I agree with removing the hydrofoil. I have a bombard C3 3.8m with a 40hp and put smart tabs on it. It occasionally will do the same thing you are describing, and did not do it until I installed the tabs. I've changed the settings on the tabs and it decreased it greatly. I have a solid wood keel and the fabric feels tight. I'm sure mine is the tabs.
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Old 28 January 2012, 13:08   #12
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Thanks sinner. Hydrofoil is coming off this spring!
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Old 28 January 2012, 15:58   #13
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Ok then, next question. Are the floor stringers correctly fitted and tubes at sufficient pressure. When launched the water temp can drop the pressures considerably causing the boat to bend. Esp if stringers have been fitted upside down causing the keel to sit incorrectly.
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Old 28 January 2012, 16:20   #14
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Yes I monitor the pressure while in the water...3 tube chambers and keel chamber kept at recommended PSI by Avon. (I have the original owners manual).
I took the whole boat apart and scrubbed every inch upon purchase. I'm positive that the stringers are proper side up /l_______l\.

One thing I might try is fully inflating the port/starboard chambers first followed by the bow chamber.
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Old 28 January 2012, 18:16   #15
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Don't do that - it may bugger up the baffles.
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Old 28 January 2012, 20:12   #16
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Roger!...that's why I haven't tried it yet. I read about that being an issue.
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Old 29 January 2012, 04:09   #17
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Quote:
Originally Posted by russhenchman
Roger!...that's why I haven't tried it yet. I read about that being an issue.
Silly question but looking at the pics do you run it with the fuel tanks at the stern it could be just a weight trim problem as much as anything else
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Old 31 January 2012, 15:49   #18
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I have tried fuel tank fore and aft....as well as shifting gear around and 1..2..3 people and shifting them around.

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Old 31 January 2012, 16:06   #19
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Last attempt. Has the engine the correct length shaft? Don't know the correct length for your vessel......but you may be have cavitation problems, although unlikely.
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Old 31 January 2012, 16:34   #20
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Yes. It is a standard shaft and I just checked the owners manual which matches up. I will take off the fins and cross my fingers!
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