Stihl MS391 - hanging idle diagnosis & muffler mod
14:45
What do you think is wrong with this Saw? Stihl MS391
23:50
Husqvarna 455 Rancher muffler mod
17:12
Lets talk about chainsaw muffler mods.
27:02
two mods you can do to increase power without porting! this really works!
8:02
Stihl ms193t before and after mod of the muffler
15:27
How to clean the carburetor on your Stihl MS171,181,211 .
50:39
Stihl MS391 Service, Modification, and Tune
19:18