Hopefully sombody can help me on this one. I bought a boat with a 1988 90HP Johnon on it. It was not kept very well and had very bad gas in the tank. I rebuilt everything in the boat and installed new tanks fuel filters, lines etc. The boat was running fine and then some of the carb cleaner I put in dislodged some muck. The boat lost all high end. I rebuilt the carbs (they were very clogged up), new floats, cleaned the jets and air orifices. Installed new wires and plugs. Now it runs clean at high RPM but idle is like the engine is fighting itself and barely runs, misses and spits.
I am at a total loss after taking the carbs off 4x. There are only 2 carbs that have absolulty no adjustmnets on them.
1. How do you adjust the mixture on these carbs?
2. Larger jets are in the bottom and smaller are inside the bowls? (just checking to make sure I put it together right)
3. Floats are set level with the carb body with about 7/8 travel. Correct?
Any help would be great. I am at wits end with this engine. I have never rebuilt arbs and had tehm run worse!