Ignition Module - Stihl MS311, MS391 (early version)

Aftermarket ignition module
Sits Stihl MS311, MS391
The Stihl MS311 and MS391 have had two different ignition module and they do not interchange. This ignition module is for the earlier model which can be identified by the air filter design. The early MS311 and MS391 saws have a square clip on air filter and the later models have a circular cylinder style filter.
Stihl part number: 1140 400 1303