I recently upgraded to a stihl ms 391 but am having alot of issues. When I first start milling it ran great but about 20 seconds in it will barely cut. I have a 25" bar on it currently. I have a brand new chain on it and have also tried a few differentripping chains. Ive only used this saw a few times. At this point my 211c cuts way better. I understand a pro saw or bigger saw would be better but this is what I could afford so any help with this issue is appreciated. Any ideas? Thanks
STIHL MS 391
- Thread starter Jimmyjam
- Start date
Help Support Arborist Forum:
A 391 is way under powered for milling and a 25" bar is about it's out limit for crosscuts.
I really appreciate ADVISE on the described issue. Again if your posting to tell me I need a bigger saw thats not helpful. Im well aware. For what im doing a smaller saw worked great actually. just wanted to upgrade a bit and this is the best I could get. I know something is wrong just not sure what. Thanks all
What are you milling? Real small stuff?
Try using 3/8 picco/lopro chain. It's smaller kerf and will take less power in the cut. You'll need a matching bar and drive sprocket. I use Stihl 63 PMX chain, but it's expensive and hard to find.
https://www.baileysonline.com/stihl-63pmx-3-8-low-profile-ripping-chain.html
https://www.baileysonline.com/woodlandpro-63rp-3-8-low-profile-ripping-chain-wpp-63rp.html
What kind of wood are you cutting? And what type of mill are you using?
I owned a 391 for awhile, you're asking a boy to do a mans job. You'll be looking for a replacement soon, as the 391 will be dead if you continue trying to mill with it. Theres no fix here, it's a firewood saw. Period.
thompsoncustom
ArboristSite Operative
sell your 391 and go and buy a holzfforma/farmertec g660 online. a 92cc saw will be way better for what your doing and you might come out money ahead as the clone saws are cheap.
How does it run if just cutting firewood? 20 inch is the max as far as I am concerned.
