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manual abstract
Fuel mix ages Only mix sufficient fuel for a few days work, not to exceed 3 months of storage. Store in approved fuel-canisters only. When mixing, pour oil into the canister first, and then add gasoline. Close the canister and shake it vigorously by hand to ensure proper mixing of the oil with the fuel. Gaso- Oil (STIHL 50:1 or line equivalent high-quality oils) US gal. US fl.oz 1 2.6 2 1/ 2 6.4 5 12.8 Dispose of empty mixing-oil canisters only at authorized disposal locations. SR 340, SR 420 English / USA Fueling Information Before You Start 373BA030 KN Before fueling, clean the filler cap and 373BA007 KN Change the fuel pick up body every year. With the engine stopped and before starting, check the air intakes between the backplate and powerhead for blockages and clean if necessary. A protective screen is available as a special accessory to keep the air intakes clear. The throttle cable disconnects itself from the throttle trigger if the engine is not falls into the tank. the area around it to ensure that no dirt shut off in the idle position. The throttle cable reconnects itself Always thoroughly shake the mixture in automatically when the setting lever is the canister before fueling your moved to the idle position. machine. In order to reduce the risk of burns or other personal injury from escaping gas vapor and fumes, remove the fuel filler cap carefully so as to allow any pressure build-up in the tank to release slowly. 373BA037 KN Before storing your machine for a long After fueling, tighten fuel cap period, drain and clean the fuel tank and as securely as possible by hand. run engine until carburetor is dry. : Move the setting lever to the idle position. SR 340, SR 420 English / USA Starting / Stopping the Engine 373BA008 KN 1373BA009 KN 2373BA010 KN373BA011 KN : Observe safety precautions – see chapter on “Safety Precautions and Working Techniques”. : Slide the stop switch ( 1) to # : Move the setting lever ( 2) to the center position – this is the starting throttle position The setting lever can be used to select any throttle opening between idle speed (lower stop) and full throttle (upper stop). Set the lever to the idle position before switching off the engine. Before starting : Move stop cock lever ( 3) to upright position. : : If the engine is cold, turn the choke knob to g If the engine is warm, turn the choke lever to e Also use this position if the engine has been running but is still cold. SR 340, SR 420 English / USA 373BA012 KN : Pull the starter grip slowly with your right hand until you feel it engage and then give it a brisk strong pull. Do not pull the starter rope out all the way as it might otherwise break. : Do not let the starter grip snap back. : Guide it slowly back into the housing so that the starter rope can rewind properly. 373BA013 KN : Put the unit on the ground. Check that bystanders are well clear of the general work area and the nozzle. : Make sure you have a firm footing: Hold the unit with your left hand on the housing and put one foot against the base plate to prevent it slipping. When engine begins to fire: : If engine is cold: Turn choke knob to e and continue cranking until engine runs. : If engine is warm: Continue cranking until engine runs. SR 340, SR 420 English / USA 373BA016 KN : Fit the spark plug and reconnect the spark plug boot. : Move the stop switch to # : Turn the choke knob to e even if the engine is cold. : Now start the engine. Fuel tank run until dry and then refueled : Pull the starter rope several times to prime the fuel line. 1 373BA015 KN 373BA014 KN As soon as engine runs: : Move the setting lever ( 2) to the lower stop so that the engine settles down to idle speed. To shut down the engine: : Move the stop switch ( 1) to 0 or STOP. At very low outside temperatures: Allow engine to warm up As soon as engine runs: : Move the setting lever to the lower stop – the engine settles down to idle speed. : Open throttle slightly – warm up engine for a short period. If the engine does not start: If you did not turn the choke knob to e quickly enough after the engine began to fire, the combustion chamber is flooded. : Pull off the spark plug boot. : Unscrew and dry off the spark plug. : Move the stop switch to 0 or STOP. : Open the throttle wide. : Pull the starter rope several times to clear the combustion chamber. SR 340, SR 420 English / USA Calculating RequiredQuantity of Solution Step 1: Determine surface area (m2) In the case of ground crops, multiply the length of the field by its width. The surface area of high-growing plants is calculated approximately by multiplying the length of the rows by the average height of the foliage. The result is multiplied by the number of rows and then by two if both sides have to be treated. The area in hectares is obtained by dividing the number of square meters by 10,000. Example: A field 120 meters long and 20 meters wide has to be treated with a pesticide. Area: 120 m x 30 m = 3,600 m2 3,600 / 10,000 = 0.36 ha...