My dramas continue...<br />My 1977 55hp Evinrude (2 banger) has been running perfect for the last couple of weeks (since its new poser pack). Yesterday we went for a run, about 1 hour, after we started, we stopped at a beach for a swim. The engine spluttered and coughed on restarting. I made it home slowely, low on power and spluttering. At home I checked it over, good spark on both pots. I noticed the bottom piston doing no work at all. With the spark plug out and running it on the top piston it spits a lot of water out form the spark plug hole. So assumption 1 is the water jacket has corroded into the bore. Assumption number 2, serious $$$ for repairs time. Can anyone let me know if these assumptions sound correct.