Never saw this happen before....long explanation req'd: Typical saturday, launched mast down, filled the WB, and motored to a deep cove, tied off to a branch of a large sunken tree, so the kids could fish. While they fished, I stepped the mast and hooked up the boom. Boat was a bit tippy from all the cockpit movement, so I unleashed the centerbd, it got away from me and made a good Thunk sound when it reached its lowest position. I cringed and spanked myself for letting it freefall, but figured its probably designed to take it. No trouble noticed yet They weren't having much luck, so decided to motor to a new spot. As soon as I got on the new heading at full speed, set the tiller to auto straight ahead and decided to raise the CB to reduce my drag. I can usually raise the CB by firmly pulling its rope by hand, but was a bit wimpy and only got it about 1/2 way up, so just cleated it at that point. Before I could grab the winch handle to crank it all the way, my daughter noisily pointed out a significant incoming water flow coming from the base of the teak, mast post near the cabin floor. This was very alarming and the first instinct was to get everything off the cabin floor that I didn't want wet. Then I stared at the leak more. It was hard to tell where it was coming from exactly, it just seemed to be coming from within that pedestal and of course had nowhere to go but to spill over the plastic moulding and onto the cabin floor, quickly filling the cooler's depression (lowest spot). I figured I was in big trouble with maybe a new leak around the CB pivot so quick checked the bilge pump was OK with a quick switch to manual, then reset my heading towards the dock. Before going down below, I raised the CB fully to minimize drag and called a friend I new was on the lake fishing as well. Went below and noticed the leaking was stopped. Docked anyway and went home. OK, back home....what happened? Total of about 1 gallon entered cabin floor before leak stopped, absolutely no water in any of the bilge areas - bone dry. Checked the CB pivot area using a mirror and flashlight, and besides a few microcracks, couldn't see up in there well enuf to determine any major damage had occured. In the cabin, removed the 4 screws holding the 2 pieces of plastic moulding down over the step pedestal, to expose a metal plate that is bolted to the hull pedestal, and serves as a base for the teak mast post and also has the tubing for the CB rope thruhull mounted thru it. I believe metal plate is the top portion of the CB pivot bracket. Its not going anywhere unless I unbolt it - not an easy feat. Can't see any other way to inspect closer. The lack of bilge water has me scratching head. Tapped on the side of the mast pedestal, and the 'boing' sound tells me it filled with water. I realize that its a completely sealed mini compartment and that water entering this pedestal area has nowhere to go but to spill over and into the cabin floor. I'm thinking that the CB 1/2 way up served as a funnel and at full motor speed, the water was forced up and into the CB nest, filling this pedestal compartment to excess. I'm coming to this conclusion because the leak stopped when I raised the CB to full up and the CB nest was no longer exposed to the same flow condition. 1. can this happen to a completely normal h240 or do I have a breach in the hull at the CB pivot nest? 2. if this is normal, can I seal the pedestal with goop around the metal plate, hence fully blocking any excess water from overflowing into the cabin, if the CB is set at this position again? I'm thinking I can temp fix it with #2, but likely have a breach that will require eventual attention. Sorry this is so long - would appreciate any help of similar experience, esp when motoring full speed with CB in 1/2 position Brian