I have posted several different questions the past few days regarding my new (to me) Suzuki DT 75 Motor. I need to recap from the beginning and see if anyone can lead me in the right direction.<br /><br />When the previous owner ran the motor it started right up and ran fine. When I got it home it wouldn't run at all, and after checking for spark (STRONG on all 3 cyl) I noticed that the fuel was VERY dirty. I drained both tanks, cleaned and dried them, and then filled them with premium fuel and a half bottle of techron. I replaced the fuel filter as well.<br /><br />The motor still didn't want to start, so I took off the air box and sprayed starting fluid into the carbs. The motor started, but was running a little ragged. As it would start easily, I took it out (in the LI Sound). <br /><br />Initially it ran ragged, and sounded like only 2 cylinders were working, but after a while the motor started to run great. We went though a tank of gas, and I was confident that the motor just needed to get good gas through it. I replaced the plugs after I got home, just for the heck of it, as the old ones looked pretty good.<br /><br />The next day I went out again, and as before, the motor ran great, pushing the 17' runabout to close to 35 Mph. As a new boater, that speed was a little uncomfortable, and most of the day was spent cruising around 20 Mph. The motor was purring, and then I ran out of gas in the first tank. I switched to the second tank, and the problems began. Firstly I noticed that the "water" light in the Suzuki gauge was on. The motor was pumping water strongly, and I am confident that it did not overheat. Then,as a few days before, the motor would not run smoothly, and seemed to be running on 2 cylinders. This time however, the problem would not go away. I took the boat home and when I flushed it with fresh water it started strongly and readily.<br /><br />This morning I started the motor, it started easily again, so I took it out for a run. The motor ran a little rough on the way out of the channel, but I figured that it would smooth out as it had before. The problem got worse however, and the motor stalled, and was VERY dificult to re-start. When it did start it would only run for a few seconds, and would make a fairly loud "chirping" noise (backfire?) and stall. Eventually I got towed in (thanks Uncle Barry!) and here we go again.<br /><br />So, short of taking it to a repair place, where do I go from here? Anyone have any idea as to what I should do now? Thanks in advance for your help.
