Impossible to answer if you do not take away the air filter and marks promptly the place where the pèrdida appears, the possibilities of pèrdida can be through several places, remove the filter, start when it is dry and look where it wets and take a photo, Matcala with an arrow and sofela.
It is true, you have to remove the filter to be able to see well, by the photos and the area it looks like a poorly held hose or a fissure in the gasifier, which is the yellow glass that is seen in the image.