Stihl 026 top cover

[mortalitool]

Hey guys, was looking at my 026 today and noticed a screw holding a small plastic insert in. I took the screw out and one side has a snow flake on it, the other a sun. Now I know what they represent, and how they help the chainsaw in terms of temperature outdoors. But does this piece really make a difference? I appreciate a company trying to make something better so does this piece make it better?

Stihl 026, 036 pro, BR550, echo CS-300, jonsereds 49sp.

 

[mortalitool]

Maybe the opening allows warm air from the muffler to be drawn over the jug and into the carb?

Stihl 026, 036 pro, BR550, echo CS-300, jonsereds 49sp.

 

[fearofpavement]

The direction the piece is installed affects the airflow to the carb. Warm air or ambient temp air.

 

[Saw Dr.]

That shutter is there to prevent carb icing at lower temps with high humidity. It does work when needed. Not a good idea to have it open during the summer, though.