Fuel Leak - Pushrod Tube

[PT20J]

Mine is doing that too. I’ll check the position of the injector nozzle bleed air hole at annual next month. Just a guess but it might be caused by fuel leaking out the bleed air hole after shutdown and then getting blown back if the engine is started again before the fuel can evaporate. Cyl 2 is unique in that the nozzle is exposed to air flowing into the cowling. 

[jetdriven]

They kind of all do that