Chainsaw Repair

I don't know what year your chainsaw is but the tank vent was changed in 2007.

Before 2007 they had the black plastic stand pipe vent 501 87 31-01 with a little disk of cork or felt 503 60 04-01 stuck in the hole

In 2007 there was a 90 degree fitting 537 09 22-01 went in the hole of the stand pipe 537 09 22-01. Then in 2011 with a rubber hose 544 32 49-06 connected to the elbow fitting went up through a hole into the carburetor air box 503 62 73-03 in a loop and connected to a little spud in the air box floor that vented the tank to the area between the carburetor air box floor and the gas tank.