I've just took out all six carbs and cleaned them. they were very dirty. I just changed the water pump. I just change the lower unit oil. I have not changed the spark plugs or the spak plug wires. on water hose. I prime bulb is hard after several pumps. I have water separator filter. starts easy. but once fired it will hesitate, rpm go up and down, then die. Same if I give it some gas and start it, it will slowly go up and down (rpm) and then die. What is the cause? It got real dark out so I was not able to play with it more cause of the neighborhood. so I was force to quit. I did check the prime bulb and it was still stiff. I did one time put it in forward and it died almost immediately. but did not try it again. I know I should have. --- could it be water in gas tank? Or I did not clean carburetors good enough? spark plugs? will spraying a can of decarb into the carbs and running it fix the problem? but I am thinking.......its not even working smoothly enough for me to spray it in? can I do this? Any help or anyone with a similar problem like this will be appreciated.<br /><br />anxious to start tomorrow after work.