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If raising the float height lowers the fuel level, then you need to turn the carbs over, you have them upside down. The straws I refer to are those little round things that stick down into the bowl, or in your case up apparently. Now refer to your comment about how the paint gun would have further to draw as the paint is depleted, this is also true with fuel. So having raised your float height (fuel level) you have made it easier to draw. Close the pilot if idle is rich, but leave the fuel available for the mains if and when they need it, otherwise you might end up lean on top due to the lack of available fuel because it has too far to draw and not enough to draw from. I sometimes use analagies for concept only not equal comparison. A pilot is a controled valve and it's size pertains to it's range and sensitivity, a main jet is controlled by the needle for mid range and is governed solely by it's size and ability to draw during WOT. The needle valve does not effect the whole range, it only overlaps slightly into the top of the low end and a little more into WOT at the other end. It does have the most range but if "set up properly" no effect on idle or WOT. The main is effectively off at idle, and unrestricted once the needle is removed WOT. Carbs101.com
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