Quote:
Originally Posted by HalcyonS
yeah but - boat is in the water ....
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Exactly. if the boat was out, it would be easy to access the thru hull from outside.
With the valve closed, you remove the hose. If opening the valve does not produce water, you ream out the barnacles with a short piece of rebar and a small hammer if needed. The actual amount of water that comes in between removing the rebar and closing the valve, although scary, is quite small.
Of course, when dealing with thru-hulls, the prudent mechanic would have functioning pump(s) and a wood plug at the ready!