stihl 028 wb top end
The previous poster was correct. The Stihl 028 did come in three different sizes, 42mm, 44mm, and a 46mm. The early 028 wb came with the 42mm. The 028 av and 028 super came with a 44mm and then a 46mm on the super. However, if your 028 wb has the 42mm it is NOT interchangeable with the 44mm and 46mm p/c, due to the rod length. So if your 028wb has a 42mm you must install a 42mm back in the saw. Also your 028wb piston might have the arrow pointing toward the intake side. Pay no attention to that and install it correctly. Early on they stamped a few pistons wrong.