THOMAS-S my question was about a o51av stihl chain saw about 3 hrs ago?

Answer 1

I will go back a few hours and see what the question was. I think though you asked why you were getting chain oil into the firing chamber. The chain oil has its own little compartment and is actually a part of the housing mold. If there was a leak in that everytime the piston went up there would be a suction to draw the chain oil into the combustion area.