Extreme angle of heel might be the key, which you can't duplicate with the garden hose. The amount of water is also significant.
Are you leaking thru the deck/hull seam?
How about the dead lights or the opening ports? Water could enter between the cabin and liner, end up on the shelves and down the hull to the bilge.
The scuppers by the cockpit from the deck down to the waterline, any sign of leaking here?
How about the cockpit sole? Fore hatch? Extreme angle may have taken leaking water off at an unusual track.
Leaking around the transom exit of the manual pump hose. ie the fitting?
A newly installed access hatch?
Water on the cockpit seats? Potential for water getting in here.
Hose clamps ok? Like the upper ones?
Water tank ok? Plastic bottle leaking?
I've been looking at so-called scupper drains for 338. They are one way fittings sometimes flapper style, ball in cage, and a soft duckbill style like the valve in a head. If you find the culprit is the pump, one of these exit check valves might work. Do you have a sufficient up-loop in the exit hose?
Reply With Quote