No. All you gotta do is pull out the gas tank so you can access the fuel tap at the bottom. ( it will help if it's empty )
There's two little flathead screws on either side of the tap. Undo those. Then the rotating portion will remove and underneath is a rubber round gasket with 4 holes in it. Just replace that piece.
Then put the thing back together, and get the two flathead screws back in there so that it's as tight as they can be while still allowing you to turn the lever.