Whats the best way to do it
use powertune, deepcreep, or some other decarb spray in a aerosal can, and spray though carbs while motor is running, then shut off and spray into cylinders. Let sit a while and then go run it. Or you can make a seafoam cocktail in small gas tank and let the motor idle off it for 10 minutes or so, let sit for a while and then go run it. After the decarb, I normally change my plugs after i run the boat