Is that liquid water, oil or fuel?
If it is water it is nothing to worry about (could just be there from its last wash) , fuel could mean a lose spark plug, and oil could mean the tappit cover is leaking into the spark plug hole some how (OK so I'm grasping at straws with the last one, I doubt it is oil)...
"Far to the general now, and without great final hope of victory, he has nothing to lose. And it must above all have rabies. For the moment, it dominates this special."