The lever broke of my seacock valve (Marelon Type)for water intake to cool the engine, I need to replace the seacock, it is the threaded tipe, does anyone know the correct size ? I am 100 milas away from the boat, the boat is on the water, is it possible to use a Wood thru hull plug on the bottom, and then unthread the seacock by the inside, seal it and replace it ? thanks in advance