Controls 2 Safety Precautions 4 Assembly of Unit 11 Fuel 14 Fueling 15 Control Handle 16 Starting 17 Air Filter 19 Adjusting the Carburetor 20 Operating Instructions 21 Checking Spark Plug 22 Replacing the Starter Rope and Rewind Spring 23 Special Accessories 26 Metering Unit 27 Notes on Use of Mistblower 28 Printed on chlorine-free paper . 1999 Andreas Stihl AG & Co., Waiblingen 0458 352 3021. M0,15. G9. PM. Printed in USA Maintenance Chart 37 Specifications 38 STIHL Incorporated Federal Emissi

This avoids unnecessary high loads during the break-in period. As all moving parts have to bed in during the break-in period, the frictional resistances in the engine are greater during this period. The engine develops its maximum power after about 5 to 15 tank fillings. 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

SR 430, SR 450 English Checking the Spark Plug 000BA039 KNA Engine Running Behavior If engine running behavior is unsatisfactory even though the air filter 1 is clean and the carburetor is properly adjusted, the cause may be the muffler. Have the muffler checked for contamination (carbonization) by your servicing dealer. STIHL recommends that you have N Clean dirty spark plug. N Check electrode gap (A) and 2 servicing and repair work carried out exclusively by an authorized STIHL servicing deale

If your daily working time is longer than normal or operating conditions are difficult ( very dusty work area etc. ), shorten the specified intervals accordingly. beforestarting workafter finishingwork or dailyafter eachrefueling stopweeklymonthlyif problemif damagedif required Complete machine Visual inspection (conditon, leaks) x x Clean x Control handle Check operation x x Air filter Clean x x Replace x Filter in fuel tank Check x Replace x x Fuel tank Clean x x Carburetor Check idle setting

Do not fill fuel canisters that are sitting in or on a vehicle. The canister should be kept tightly closed in order to avoid any moisture getting into the mixture. The machine‘s fuel tank and the canister in which fuel mix is stored should be cleaned as necessary. 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

If you have any reason to believe that you might be blowing or otherwise disturbing asbestos, immediately contact your employer or a local OSHA representative. Warning! Dust with silica in its composition may contain crystalline silica. Silica is a basic component of sand, quartz, brick, clay, granite and numerous other minerals and rocks, including masonry and concrete products. Repeated and / or substantial inhalation of airborne crystalline silica can cause serious or fatal respiratory diseas

N Refit the filter cover and turn the filter cover lock to the horizontal position, Engine Management 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. 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 i

The throttle trigger must move freely. Never attempt to modify the controls or safety devices. Warning! Never use a power tool that is damaged or not properly maintained. Warning! Check that the spark plug boot is securely mounted on the spark plug – a loose boot may cause arcing that could ignite combustible fumes and cause a fire. Warning! Keep the handles clean and dry at all times; it is particularly important to keep them free of moisture, pitch, oil, grease or resin in order for you to mai

Inspections andMaintenance by Dealer Spark Arresting Screen in Muffler Spark arresting screen in muffler (not all markets) N If the engine is down on power, check the spark arresting screen in the muffler. STIHL recommends that you have servicing and repair work carried out exclusively by an authorized STIHL servicing dealer. BG 56, BG 56 C, BG 66, BG 86, BG 86 C, SH 56, SH 56 C, SH 86, SH 86 C English Maintenance and Care The following intervals apply to normal operating conditions only. If you

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