I have a 75 9.9 Evinrude long shaft. I brought it out yesterday and started it up with no problems, started on 4th pull. Shut it off with kill switch. I ran in it in a clean trash can ful of water, was water sputering out of pee hole. Came back approx 4 hrs later to re-start, will not start. Replaced fuel, checked fule lines for blockage, pulled off carb-clean as a whistle, checked spark - lower cylinder only - but should at least fire. I am at a loss right now - dont want to spend big bucks at repair shop on old motor. Any suggestions?