. 486 Answers SOURCE: Over the past 8 years, the FS55 has had at least 5 different carburetors, and they have at least 3 different systems with different adjustments. Many of them do not have much of an adjustment and will not cure running problems. If you are experiencing poor running conditions, I would suggest some basic checks first. The spark arrestor screen is a big culprit on this model. Chainsawr.com/./ tuning./1126042- adjustment-and- tuning-of-a- c. Carburetor Adjustment for Chainsaws Carburetor adjustment is critical on chain saws.
These saws have what is called a 'fixed jet' which is set from the factory. Tekindoor.com MISC. Stihl chainsaw's have three carburetor adjustment screws (LA) Idle Speed screw - This.
When the engine is tested at the factory the carburetor is set to obtain a. Adjustable Mortgage Rates. The fuel/air mixture in any gasoline-powered engine is regulated by the carburetor, and the carburetor in a Stihl chainsaw is factory-adjusted to provide the best performance.
You'll find three adjustment screws for the carburetor, usually located under the air filter cover. Dec 04, 2015. Download Link: This service manual contains detailed descriptions of all the repair and servicing procedures specific to this power tool series. There are separate handbooks for servicing procedures for standardized parts and assemblies that are installed in several STIHL power tool models. Reference is made to these handbooks in the appropriate chapters in this manual. As the design concept of models FS 120 FS 200 FS 300 FS 350 FS 400 FS 450 and FR 350, FR 450 is almost identical, the descriptions and servicing procedures in this manual generally apply to all models.
Dec 03, 2013. Hi F Del Before you remove or try to adjust your low and high speed jets you should always count the number of turns it takes to lightly seat the idle mixture screw and high speed needle adjusting screws. Be sure to write the number of turns down on a piece of paper so you will know how many turns from the seated position to open the jets when you go to reinstall them, or if you remove them for cleaning or replacement. If you have aready tried to adjust them then the adjustments below should get it running for you for final adjustment when warm.
Normally you will adjust your idle jet to 1/2-3/4 turn open from the bottom seated position. Then you will re-adjust the low speed of the engine when the engine is warm by turning the idle screw in or out till the engine runs smoothly at idle speed, around 1200 RPM. The high speed jet is adjusted to 1 1/2- 1 3/4 open from the bottom seated position, after the engine is warm. Then re-adjusted by turning the High Speed jet adjustment screw in or out till the motor runs smoothly at high speed. Alway use the 'lightly seated' method if you have not changed the screw settings.
Please take time to rate me Bud Oct 10, 2012. Download Link: This service manual contains detailed descriptions of all the repair and servicing procedures specific to this power tool series. There are separate handbooks for servicing procedures for standardized parts and assemblies that are installed in several STIHL power tool models.
Reference is made to these handbooks in the appropriate chapters in this manual. As the design concept of models FS 120 FS 200 FS 300 FS 350 FS 400 FS 450 and FR 350, FR 450 is almost identical, the descriptions and servicing procedures in this manual generally apply to all models. Jul 05, 2012.
Description Stihl FS 120 Service Workshop Manual Repair Stihl FS 120 Service Workshop Manual for the Stihl brushcutter, Trimmer, clearing saw. Repair and service the FS120 with this manual, which has clear repair photos.
The manual has diagrams and accurate information as used by professional mechanics and repair shops to troubleshoot and repair the brushcutter. View free page images online or download full PDF that you can print or view on any suitable device.
The manuals have plenty of pictures and diagrams to make the entire repair process easy for you. Can be used as guides for other models as they may share key components such as motors. Stihl FS 120 Service Workshop Manual Contents Introduction, Specifications, Troubleshooting Attachments, Clutch, Engine, Ignition, Starter, Servicing, Controls, Fuel System, Special Tools. The FS 120 PDF manual has very detailed diagrams and descriptions.
At the click of a mouse you have access to the most comprehensive diagnostic, repair and maintenance information as used by professional mechanics, technicians and repair workshops. Very clear and precise diagrams and instructions. The manual is designed to get the information you need quickly and easily. Stihl FS 120 Specifications Capacity cm3 30,8 Performance kW 1,3 Weight kg 1) 6,3 Sound pressure level with plastic tool dB(A) 2) 98 Sound pressure level with metal tool dB(A) 2) 97 Sound power level dB(A) 2) 111 Sound power level with metal tool dB(A) 2) 109 Cutting diameter mm 420 Tank volume l 0,64 Speed at maximum power Um 9.000 Stihl FS 120 Service Workshop Manual Diagrams.