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Manafacture: Stihl File size: 1.98 mb File name: Language of manual:

It springs back to the run position F. The ignition is switched on again. 452BA122 KN 0009BA011 KN 0009BA021 KN BR 350, BR 430 English Starting As soon as the engine runs BR 350 0009BA012 KN H LA L 0009BA015 KN NPlace the unit securely on the ground and make sure that bystanders are well clear of the N Press the fuel pump bulb at least eight times – even if the bulb is filled with fuel. Cold engine (cold start) BR 430 0009BA016 KN 0009BA013 KN 0009BA022 KN N Push the choke knob in and turn it to c. Warm engine (warm start) 0009BA014 KN NPush the choke knob in and turn it to o. Also use this setting if the engine has been running but is still cold. nozzle outlet. N 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. N 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 out the starter rope to full length – it might otherwise break. N Do not let the starter grip snap back. N Operate the throttle trigger. 0009BA017 KN N Choke knob returns automatically to Guide it slowly back into the housing run position e. so that the starter rope can rewind properly. At very low outside temperatures N Crank the engine until it begins to N Open throttle slightly – warm up the fire. After no more than three engine for a short period. attempts, turn the choke knob to o. BR 350, BR 430 English To shut down the engine BR 350 BR 430 N Move the setting lever in the direction of † – the engine stops – the setting lever springs back to the on position. Other hints on starting Engine stalls in cold start position c or under acceleration N Move the choke knob to o and continue cranking until the engine runs. Engine does not start in warm start position o N Move the choke knob to cand continue cranking until the engine runs. If the engine does not start N Check that all settings are correct. N Check that there is fuel in the tank and refuel if necessary. N Check that the spark plug boot is properly connected. N Repeat the starting procedure. Fuel tank run until completely dry N After refueling, press the fuel pump bulb at least eight times – even if the bulb is filled with fuel. N Set the choke knob according to engine temperature. N Start the engine. Operating Instructions During Operation After a long period of full throttle operation, allow the engine to run for a short while at idle speed so that engine heat can be dissipated by the flow of cooling air. This protects engine- mounted components (ignition, carburetor) from thermal overload. After Finishing Work Storing for a short period: Wait for the engine to cool down. Empty the fuel tank and keep the machine in a dry place, well away from sources of ignition, until you need it again. For longer out-ofservice periods – see "Storing the Machine". 0009BA018 KN 0009BA023 KN BR 350, BR 430 English Dirty air filters reduce engine power, increase fuel consumption and make starting more difficult. If there is a noticeable loss of engine power NRemove the filter element (3). NReplace dirty or damaged filters. NFit the new filter in the filter housing. NFit the filter cover. NInsert the screws and tighten them down firmly. Exhaust emissions are controlled by the design of the fundamental engine parameters and components (e.g. carburation, ignition, timing and valve or port timing) without the addition of any major hardware. Replacing the Air Filter 1 0002BA046 KN 1 2 0002BA047 KN 3 Engine Management N Turn the choke knob to c. N Loosen the screws (1). N Remove the filter cover (2). BR 350, BR 430 English Adjusting the Carburetor The carburetor comes from the factory with a standard setting. This setting provides an optimum fuel-air mixture under most operating conditions. With this carburetor it is only possible to adjust the high speed screw within fine limits. Standard Setting N To shut down the engine N Check the air filter and replace it if necessary. N Check that the throttle cable is properly adjusted – readjust if necessary – see chapter on "Adjusting the Throttle Cable". N Have the spark arresting screen (not all markets) checked – see “Inspection and Maintenance by Dealer" 0002BA048 KN H LA L BR 350 N Turn high speed screw (H) counterclockwise as far as stop (no more than 3/4 turn). N Turn the low speed screw (L) carefully clockwise as far as stop, then turn it back 1 1/2 turns. N Start and warm up the engine. BR 430 N Turn high speed screw (H) counterclockwise as far as stop (no more than 3/4 turn). N Turn the low speed screw (L) carefully clockwise as far as stop, then turn it back 1 turn. N Start and warm up the engine. Adjusting Idle Speed Engine stops while idling N Check the standard setting. N Turn the idle speed screw (LA) slowly clockwise until the engine runs smoothly. Erratic idling behavior, engine stops even though setting of LA screw has been corrected, poor acceleration Idle setting is too lean N Tur...

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