After a whole summer of running flawlessly, my 2002 Yamaha 90 2 stroke started sneezing at idle again when I got back to the dock last Saturday. It is my understanding that this is caused by lean conditions due to obstructions in the fuel idle passages of the carburetor(s). When this problem happened last winter I disassembled, cleaned, and reassembled all three carburetors the problem went away for the last nine months. (I didn't replace any parts, gaskets, or diaphragms.) Not wanting to do that all over again I am wondering if there is any "trick of the trade" to remedy this problem without the full disassemble cleaning?