Forums
New posts
Search forums
What's new
Articles
Latest reviews
Author list
Classifieds
Log in
Register
What's new
Search
Search
Search titles and first posts only
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Forums
Chatting and General Stuff
General Discussion
Stihl 391 Chainsaw
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="Oak_Leaf" data-source="post: 3036546" data-attributes="member: 128477"><p>I don't think the 391 has M-tronic. Look to see if you have adjustment screws for the Hi and Lo jets. If you do, then you do not have the M-tronic.</p><p></p><p>If you're having starting issues, like someone said try non-ethanol fuel greater than 89 octane first.</p><p></p><p> Second, check your exhaust screen for carbon buildup. Every once in a while a new saw can clog that screen up if it was running too rich from the dealer.</p><p></p><p>Last, for cooler weather (denser air), you're gonna want richen up the Lo jet a tad by turning it CCW, maybe a 1/16-1/8th turn. When you get it running adjust that jet slightly until you get a smooth idle. You may have to tweak it throughout the year as temps change. Rich in cooler weather, leaner in warmer weather. Otherwise, the 391 is just a big saw and may take a few pulls to prime if it's been sitting.</p></blockquote><p></p>
[QUOTE="Oak_Leaf, post: 3036546, member: 128477"] I don't think the 391 has M-tronic. Look to see if you have adjustment screws for the Hi and Lo jets. If you do, then you do not have the M-tronic. If you're having starting issues, like someone said try non-ethanol fuel greater than 89 octane first. Second, check your exhaust screen for carbon buildup. Every once in a while a new saw can clog that screen up if it was running too rich from the dealer. Last, for cooler weather (denser air), you're gonna want richen up the Lo jet a tad by turning it CCW, maybe a 1/16-1/8th turn. When you get it running adjust that jet slightly until you get a smooth idle. You may have to tweak it throughout the year as temps change. Rich in cooler weather, leaner in warmer weather. Otherwise, the 391 is just a big saw and may take a few pulls to prime if it's been sitting. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Chatting and General Stuff
General Discussion
Stihl 391 Chainsaw
Top