My props tangled with some rocks last night and now the vibration is really bad. Bad enough that I can't even travel faster than a couple mph. Question: Can the prop be removed/replaced in the water easily enough? To complicate things, its a dual prop. Do you actually need both props? Both props are pretty mangled. How difficult is it to work on this in the water?(underwater). Do you just remove the cone and then go after the nut to remove the prop? (Volvo Penta on Wellcraft)<br />Thanks in advance.