Here is help identifying your Stihl Products

We have gleaned this information from the Stihl USA Web site.  

From; Chainsaw FAQ

Where do I find my serial number?
Most serial numbers are stamped in the motor housing or crankcase to the left or right of the muffler looking down from the top on a flat surface. They will in most cases be 9 digits long and begin with the number 1, 2 or 5.

From; Trimmers FAQ

Where do I find my serial number?
On homeowner trimmers, it is located on the bar code label on the fan casing. On professional units and brushcutters it is on the bar code label and stamped in the top of the cylinder or main crank case. All current serial numbers will be nine digits long and begin with the numbers 1, 2, 5, 8 or 9.

From; Blowers FAQ

Where do I find my serial number?
On handheld blowers and shredder vacs, it is located on the bar code label on the fan casing. On backpack blowers, it is on the bar code label and stamped in the top of the cylinder or main crank case. All current serial numbers will be nine digits long and begin with the number 2, 3, 5 or 9.

From; KombiSystem FAQ

Where do I find my serial number?
On homeowner Kombi units it is only located on the bar code label on the fan casing. On the professional models, it is on the bar code label and stamped in the top of the cylinder or main crank case. All current serial numbers will be 9 digits long and begin with the number 2 or 5.