Craftsman 79193 Operation Manual - Page 10

REPLACING THE SPARK PLUG LONG TERM STORAGE Use a replacement Champion ® #RDZ19H spark plug. The correct air gap is 0.025 in. (0.635 ram.}. Remove the plug after every 25 hours of operation and check its condition. 1. Stop the engine and allow it to cool. Remove the six (6) screws on the back of the engine cover with a Flat-head or -I--25 Torx screwdriver (Fig. 29). 2. Grasp the plug wire firmly and pull the cap from the spark plug. --_[_ i eleActRroNdeINs.G: Grit Dino tnhoet esnagnidne bclaosutl,d scdrampeageor cthleancylsinpdarekr. plug 3. Clean dirt from around the spark plug. Remove the spark plug from the cylinder head by turning a 5/8 in. socket counterclockwise. 4. Replace cracked, fouled or dirty spark plug. Set the air gap at 0.025 in. (0.635 ram) using a feeler 0.025 in. t (0.635 ram) gauge (Fig. 33). Fig. 33 5. Install a correctly-gapped spark plug in the cylinder head. Turn the 5/8 in. socket clockwise until snug. If using a torque wrench torque to: 110-120 in.olb. (12.3-13.5 Nora} Do not over-tighten. SPARK ARRESTOR MAINTENANCE 1. Drain all gasoline from the gas tank into a container. Do not use gas that has been stored for more than 60 days. Dispose of the old gasoline in accordance to Federal, State, and Local regulations. 2. Start the engine and allow it to run until it stalls. This ensures that all gasoline has been drained from the carburetor. 3. Allow the engine to cool. Remove the spark plug and put 5 drops of high quality motor oil into the cylinder. 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 the cylinder before attempting to start the trimmer after storage. 4. Change the oil, referring to Changing the Oil. Dispose of the old oil in accordance to Federal, State and Local regulations. 5. Thoroughly clean the unit and inspect for any loose or damaged parts. Repair or replace damaged parts and tighten loose screws, nuts or bolts. The unit is ready for storage. TRANSPORTING Allow the engine to cool before transporting. Secure the unit while transporting. Drain the gas tank before transporting. Tighten gas cap before transporting. 1. Remove the rear engine cover. See Rocker Arm Clearance. 2. With a flat blade screwdriver or Torx -I--20 bit and a T-25 bit, remove the screws attaching the spark arrestor cover to the muffler (Fig. 39). Muffler Spark Arrestor 3. Pull the tab on the spark arrestor cover out of the muffler. Remove the spark arrestor cover. Cover ELECTRIC START FEATURE This unit is designed to be started with an optional electric starter. If choosing to start the unit using the electric start feature please refer to the Electric Starter operator's manual for correct starting procedure. If you have any question please call 1-800-235-5878. 4. Remove the spark arrestor screen from the spark arrestor cover. 5. Clean the spark arrestor screen with a wire brush or replace it. Screen Slot 1"=20Screw_ _ Fig. 39 6. Reinstall the spark arrestor screen, spark arrestor cover and screws. CLEANING i _ turn the unit off and allow it to cool before you clean or WseArvRicNe INit.G: To avoid serious personal injury, always 1| Item No. Use a small brush to clean off the outside of the unit. Do not use 316.85951 strong detergents. Household cleaners that contain aromatic oils such as pine and lemon, and solvents such as kerosene, can damage plastic housing or handle. Wipe off any moisture with a soft cloth. STORAGE Electric Start Feature Description Electric Starter Never store the unit with fuel in the tank where fumes may reach an open flame or spark. Allow the engine to cool before storing. Lock up the unit to prevent unauthorized use or damage. Store the unit in a dry, well-ventilated area. Store the unit out of the reach of children. 10