Craftsman 21ES122R799 Operator's Manual

TRANSPORTING• Allow the engine to cool before transporting.• Drain fuel from unit.• Tighten fuel cap before transporting.• Secure the unit while transporting.CLEANINGUse a small brush to clean off the outside of the unit. Do not use strongdetergents. Household cleaners that contain aromatic oils such as pineand lemon, and solvents such as kerosene, can damage plastic housingor handle. Wipe off any moisture with a soft cloth.STORAGE• Never store a fueled unit where fumes may reach an open flame or spark.• Allow the engine to cool before storing.• Store the unit locked up to prevent unauthorized use or damage.• Store the unit in a dry, well-ventilated area.• Store the unit out of the reach of children.LONG TERM STORAGEIf you plan on storing the unit for an extended time, use thefollowing storage procedure:1. Carefully drain the fuel tank by running the unit dry or removefuel cap and tip the motor housing over and drain oil/gas fuelinto a container with the same 2-cycle fuel mixture. Do not usefuel that has been stored for more than 60 days.2. Start the engine and allow it to run until it stalls. This ensuresthat all fuel has been drained from the carburetor.3. Allow the engine to cool. Remove the spark plug and put 5drops of any high quality motor oil or 2-cycle oil into thecylinder. Pull the starter rope slowly to distribute the oil.Reinstall the spark plug.NOTE: Remove the spark plug and drain all of the oil from thecylinder before attempting to start the unit after storage.4. Thoroughly clean the unit and inspect it for any loose ordamaged parts. Repair or replace damaged parts and tightenloose screws, nuts or bolts. The unit is ready for storage.MOVING THE UNIT1. Allow the unit to coolbefore moving.2. Loosen the knobs on thehandlebar.3. Fold the handlebars downas shown (Fig. 19).Tighten the knobs.4. Either carry the unit bythe shaft tube grip orgrasp the center of thehandlebar to use it as acarrying handle (Fig. (20).5. After the unit has beenmoved, reposition thehandlebars and continueoperation.8SPARK ARRESTOR MAINTENANCENOTE: Pay close attention when disassembling the muffler so youcan put it back together correctly. Failure to do so willdamage the unit and may cause serious personal injury.1. Remove air filter/muffler cover. Refer to Removing the AirFilter/Muffler Cover.2. Locate the muffler, but do not remove it. Find the screw on thebottom of the muffler (Fig. 17). This screw holds the Spark ArrestorHood Assembly and the spark arrestor screen to the bottom of themuffler. Remove this screw using either a Torx T20 or flat bladescrewdriver.3. Using a small flat bladescrewdriver, carefully pryup the spark arrestorscreen from the recessedhole, taking care to noticethat the “raised” part ofthe spark arrestor screenis inside the recessed hole.Remove the spark arrestorscreen from the muffler.4. Clean the spark arrestor screen with a wire brush. Replace it if itis damaged, or if you are unable to clean it thoroughly.5. Reinstall the spark arrestor screen by putting the “raised”portion of the screen inside the recessed hole of the muffler.Make sure that the spark arrestor screen fits flat against themuffler.6. Place the spark arrestor hood on top of the spark arrestor platewith the “raised” side up and the opening facing AWAY from theengine (Fig. 17). Verify that the exhaust will be directed AWAYfrom the engine.7. Replace the screw you removed in Step 2 and tighten securely.8. Reinstall the air filter/muffler cover (Fig. 12).CARBURETOR ADJUSTMENTNOTE: Careless adjustments can seriously damage your unit. Contacta Sears or other qualified service dealer to make carburetoradjustments. Call 1-800-4-MY-HOME® for more information.REPLACING THE SPARK PLUGUse a Champion RDJ7Y spark plug or equivalent. Remove the plugafter every 25 hours of operation and check its condition.1. Stop the engine and allow it to cool. Grasp the plug boot firmlyand pull it from the spark plug.2. Clean around the sparkplug. Remove the sparkplug from the cylinderhead by turning a 5/8-inch socketcounterclockwise.3. Replace a cracked, fouledor dirty spark plug. Setthe air gap at 0.025 in.(0.635 mm) using a feelergauge (Fig. 18).4. Install a correctly-gapped spark plug in the cylinder head. Tighten byturning the 5/8-inch socket clockwise until snug. If using a torquewrench, torque to:110-120 in.•lb. (12.3-13.5 N•m). Do not over-tighten.5. Reattach the plug boot.MAINTENANCE & REPAIR INSTRUCTIONSScrewsFig. 17TabsSpark Arrestor Hood0.025 in.(0.635 mm)Fig. 18WARNING: If the spark arrestor hood and spark arrestorscreen are not tightened securely, they could fall off causingdamage to the unit and possible serious personal injury.WARNING: Do not sand blast, scrape or clean spark plugelectrodes. Grit in the engine could damage the cylinder.WARNING: To avoid serious personal injury, always turn yourunit off and allow it to cool before you clean or maintain it.Spark ArrestorScreen MufflerEngineSlotsFig. 19Fig. 20