My carb setting are all messed up. Does anyone have the carb settings for this engine. The fuel line comes into the motor housing, goes under the carb into a rectangular device about 1.5" tall 2.5" wide and .5" thick. This is attached to the side of the carb with a fuel line going into the carb and a second fuel line going into the engine. Will someone explain to me how this functions and what the carb setting should be. Thanks, TRod.