I have a pair of brand new drain plug assemblies for any Seadoo jet ski, 2006/2007, part # 292001252.

They sell for $23.50 each, looking for $30 shipped for the pair.
Remove 2 screws pull out, pull off the bailer hose, put hose on new one, slip back in, replace screws, done, self sealing.

This will solve water not draining due to a stuck one way valve inside the assembly.