Recently my 1989 100hp Johnson sunk. It was under water for approx 3-4 hours before I could get it afloat. Blewout the engine real well, took down carbs and cleaned them, changed spark plugs, new fuel and clean all fuel lines. Began cranking and within a few chranks it started but idled rough. Cleaned plugs once again and the same thing happened. The above was repeated a few times with the same results, then it stop starting completely. I repeated all of the above and nothing. I then discovered my spark plugs are not firing at all. Any suggetions? Have I shorted something out does something need to be change.<br /><br />Any Help would be greatly appreciated<br />Thanks