Troy-Bilt TB42 Operation Manual - Page 6

MAINTENANCE AND REPAIR INSTRUCTIONS AIR FILTER MAINTENANCE WARNING: To avoid serious personal injury, always turn the unit off and allow it to cool before you clean or service it. Cleaning the Air Filter Failure to maintain your air filter properly can result in poor performance or can cause permanent damage to your engine. Air Filter Cover Air Filter Housing Air Filter 1. Open the air filter cover by unscrewing the cover screw (Fig. 34). 2. Remove the air filter and the screen that sits behind it (Fig. 34). Cover Screw 3. Wash the filter in detergent and water. Rinse the filter thoroughly and allow it to dry. 4. Apply enough clean SAE 30 motor oil to lightly coat the filter. Slots Hooks 5. Squeeze the filter to spread and remove excess oil. Cover Screw Hole 6. Replace the air filter and the screen that sits behind it (Fig. 34). NOTE: Operating the unit without the air filter will VOID the warranty. 7. Reinstall the air filter cover. Insert the hooks on the air filter housing into the slots on the air filter cover Air Filter (Fig. 34). Cover 8. Swing the air filter cover to the right and align the cover screw Fig. 34 Air Filter Housing with the cover screw hole (Fig. 11). Tighten the cover screw to secure the air filter cover. NOTE: Do not over tighten as this may strip the screw. IDLE SPEED ADJUSTMENT The idle speed of the engine is adjustable. An idle adjustment screw is between the air filter cover and the engine starter housing (Fig. 35). NOTE: Careless adjustments can seriously damage the unit. An authorized service dealer should make carburetor adjustments. If, after checking the fuel mixture and cleaning the air filter, the engine still will not idle, adjust the idle speed screw as follows: Idle Speed Screw 1. Start the engine and run for one minute to warm up. Refer to Starting and Stopping Instructions. 2. Release the throttle trigger and let the engine idle. If the engine stops, insert a small Phillips screwdriver into the idle adjustment screw (Fig. 35). Turn the idle speed screw clockwise 1/8 of a turn at a time (as needed) until the engine idles smoothly. 3. If the engine appears to be idling too fast, turn the idle speed screw counterclockwise 1/8 of a turn at a time (as needed), to reduce idle speed. Fig. 35 Checking the fuel mixture, cleaning the air filter and adjusting the idle speed should solve most engine problems. If not and all of the following are true: • the engine will not idle • the engine hesitates or stalls on acceleration WARNING: The cutting attachment will spin during idle speed adjustments. Wear protective clothing and observe all safety instructions to prevent serious personal injury. • there is a loss of engine power Have the carburetor adjusted by an authorized service dealer. REPLACING THE SPARK PLUG Use replacement #753-06193, a Champion RDJ7J spark plug, or equivalent. The correct air gap is 0.025 inch (0.635 mm). Remove the plug after every 25 hours of operation and check its condition. 1. Stop the engine and allow it to cool. Grasp the plug wire firmly and pull it from the spark plug. 2. Clean around the spark plug. Remove the spark plug from the cylinder head by turning a 5/8-inch socket counterclockwise. WARNING: Do not sand blast, scrape or clean electrodes. Grit in the engine could damage the cylinder. 3. Replace a cracked, fouled or dirty spark plug. Set the air gap at 0.025 in. (0.635 mm) using a feeler gauge (Fig. 36). 4. Install a correctly-gapped spark plug in the cylinder head. Tighten by turning the 5/8-inch socket clockwise until snug. 0.025 in. (0.635 mm.) Fig. 36 If using a torque wrench torque to: 110-120 in.•lb. (12.3-13.5 N•m) Do not over tighten. TROUBLESHOOTING CAUSE ENGINE WILL NOT START Empty fuel tank The primer bulb wasn't pressed enough Engine is flooded The fuel is old (over 30 days) and/or improperly mixed Fouled spark plug ACTION Fill fuel tank with properly mixed fuel Press the primer bulb 10 times or until fuel is visible With the choke lever in position 3, squeeze the trigger and pull the starter rope Drain the fuel tank and add fresh, properly mixed fuel Replace or clean the spark plug ENGINE WILL NOT IDLE Air filter is plugged The fuel is old (over 30 days) and/or improperly mixed Improper idle speed Replace or clean the air filter Drain the fuel tank and add fresh, properly mixed fuel Adjust the idle speed ENGINE WILL NOT ACCELERATE The fuel is old (over 30 days) and/or improperly mixed Cutting head bound with grass Dirty air filter Drain the fuel tank and add fresh, properly mixed fuel Stop the engine and clean the cutting head Clean or replace the air filter ENGINE LACKS POWER OR STALLS The fuel is old (over 30 days) and/or improperly mixed Fouled spark plug Drain the fuel tank and add fresh, properly mixed fuel Replace or clean the spark plug CUTTING HEAD WILL NOT ADVANCE LINE Cutting head bound with grass Cutting head out of line Inner reel bound up Cutting head dirty Line welded Line twisted when refilled Not enough line is exposed Stop the engine and clean cutting head Refill with new line Rewind the inner reel Clean inner reel and outer spool Disassemble, remove the welded section and rewind Disassemble and rewind the line Push the bump knob and pull out line until 4 inches (102 mm) of line is outside of the cutting head CUTTING LINE ADVANCES UNCONTROLLABLY Oil, cleaner or lubricant in cutting head Clean and thoroughly dry the cutting head IF FURTHER ASSISTANCE IS REQUIRED, CONTACT AN AUTHORIZED SERVICE DEALER. OPTIONAL ACCESSORY ELECTRIC STARTER AND POWER START BIT™ FEATURES This unit is designed to be started with an optional electric starter or Power Start Bit™, which are sold separately. If choosing to start the unit using one of these features or have questions, please contact your local retailer or call 1-800-828-5500 in the U.S. (1-800-668-1238 in Canada) for more information and purchasing. You may also go to www.troybilt.com or www.troybilt.ca. Electric Start Feature Fig. 37 SPECIFICATIONS Engine Type Air-Cooled, 2-Cycle Stroke 1.10 in. (2.8 cm) Displacement 27 cc Operating RPM 6,800+ rpm Idle Speed RPM 2,800 - 3,400 rpm Spark Plug Gap 0.025 in. (0.635 mm) Lubrication Fuel/Oil Mixture Fuel/Oil Ratio 40:1 Fuel Tank Capacity 14 fl. oz. (397 ml) Approximate Unit Weight (without fuel 11 - 13 lbs. (5 - 5.9 kg) Cutting Mechanism 4 Tooth Cutting Blade, Dual String Cutting Head Shoulder Strap Single Quick Snap Trimming Line Diameter 0.105 in. (2.66 mm) Cutting Path Diameter 18 in. (45.72 cm) * All specifications are based on the latest product information available at the time of printing. We reserve the right to make changes at any time without notice. CLEANING AND STORAGE CLEANING WARNING: To avoid serious personal injury, always turn the unit off and allow it to cool before you clean or service it. Use a small brush to clean off the outside of the unit. Do not use 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 • 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. Short Term Storage (1-2 weeks) 1. Store the unit in a horizontal position. If this is not possible, store the unit vertically with the engine at the top. Long-term Storage 1. Remove the fuel cap, tip the unit and drain the fuel into an approved container. NOTE: Do not use gasoline that has been stored for more than 30 days. Dispose of old gasoline in accordance with federal, state and local regulations. 2. Start the engine and allow it to run until it stalls. This ensures that all fuel has been drained from the carburetor. 3. Allow the engine to cool. Remove the spark plug and put 5 drops of any high quality motor oil or 2- cycle 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 unit after storage. 4. Thoroughly clean the unit and inspect it for any loose or damaged parts. Repair or replace damaged parts and tighten loose screws, nuts or bolts. The unit is ready for storage. 6