Stihl HL 91 K Instruction Manual - Page 26

1191BA023 KN English Sharpening Instructions When cutting performance and behavior begin to deteriorate, i.e. blades frequently snag on branches: Resharpen the cutting blades. It is best to have the cutting blades resharpened by a dealer on a workshop sharpener. STIHL recommends an authorized STIHL servicing dealer. It is also possible to use a flat crosscut sharpening file. Hold the sharpening file at the prescribed angle (see "Specifications"). N Only sharpen the cutting edges - take care not to file the cutter guard (see "Main Parts"). N Always file towards the cutting edge. N The file only sharpens on the forward stroke - lift it off the blade on the backstroke. N Use a whetstone to remove burr from cutting edge. N Remove as little material as possible. N After sharpening, clean away filing or grinding dust and then spray the cutting blades with STIHL resin solvent. NOTICE Do not operate your machine with dull or damaged cutting blades. This may cause overload and will give unsatisfactory cutting results. Storing the Machine For periods of about 3 months or longer N Drain and clean the fuel tank in a well ventilated area. N Dispose of fuel properly in accordance with local environmental requirements. N Run the engine until the carburetor is dry - this helps prevent the carburetor diaphragms sticking together. N Clean the cutting blades, check condition and spray them with STIHL resin solvent. N Fit the blade scabbard. N Thoroughly clean the machine. N Store the machine in a dry and secure location Keep out of the reach of children and other unauthorized persons. Inspection and Maintenance by User Throttle Cable Checking adjustment of throttle cable Error: Engine speed increases when only the throttle trigger is pulled. 2 1 N Start the engine. N Pull the throttle trigger (1) - do not press down the throttle trigger lockout (2). If the engine speed increases or if the cutting blades run, the throttle cable has to be adjusted. N Shut off the engine. N Have throttle cable adjusted by your dealer. STIHL recommends an authorized STIHL servicing dealer. Spark arresting screen in muffler WARNING To reduce the risk of fire caused by hot particles escaping from the machine, never operate the machine without a spark arresting screen, or with the spark 24 HL 91 K