50 TO 189 octane
Depends on the Model of stihl trimmer you have. The 45 home trimmer from stihl takes .080 but from that model to the larger more expensive ones the string size gets larger.
Go to your nearest stihl specialist dealer
a dealer that sells stihl or maybe online
China
Certain models of Stihl grass trimmers are designed to run on gasoline and can be used with up to a 10% (E10) blend of ethanol in the gasoline/engine oil mix, although it is important not to exceed this limit.
0.020"
shema motora
To lubricate the shaft of a Stihl FS-46 trimmer, apply Reynolds lubricant to the shaft. Rotate the shaft and pull the converging wedge between the shaft and the bearing.
Stihl FS 55 FS 65 FS 65-4 Brushcutters & FS 55,FS 55 C,FS 55 R,FS 55 RC,FS 55 T,FS 55 TC Parts Workshop Service Repair Manual This handbook contains a detailed description of all the repair.. Download LInk http://www.ebookspdfmanual.com/search/Stihl+Fs+55+/
The best electric string trimmer based on the consumer report is the Stihl FSE 60. They say it can handle as tough of weeds as any gas trimmer but you do have to contend with the chord. For a 2 stroke string trimmer, the best one is Echo SRM-225. It is light and tough on weeds.
Homelite string trimmers are inexpensive brand that you can probably buy at home depot. Depending on how much trimming you have to do in your lawn, should help you decide on how much you want to put down on a trimmer. I suggest going with a Stihl trimmer or a Poulan Pro. You can probably find a bottom of the line residential unit from these brands for about what you would pay for a homelite maybe a few dollars more, but worth it.http://www.weedwackerstore.com