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manual abstract
5. Reinstall the spark arrestor screen, clip, muffler cover and screws. 17 MAINTENANCE & REPAIR INSTRUCTIONS CHECKING THE OIL LEVEL CAUTION: To prevent extensive engine wear and damage to the unit, always maintain the proper oil level in the crankcase. Never operate the unit with the oil level below the bottom of the dipstick. The importance of checking and maintaining the proper oil level in the crankcase cannot be overemphasized. Check oil before each use: 1. Stop engine and allow oil to drain into the crankcase. 2. To get a proper oil level reading, place the unit on a flat, level surface. 3. Keep dirt, grass clippings and other debris out of the engine. Clean the area around the oil fill plug/dipstick before removing it. 4. Remove the oil fill plug/dipstick and wipe off oil. Reinsert it all the way back in. 5. Remove the oil fill plug/dipstick and check the oil level. The oil should reach the top of the dipstick. See Figure 24. Top of Dipstick O-Ring Oil Fill Plug/Dipstick Full Add 1.4-1.5 Oz. (41-44 ml) FIGURE 24 6. If the level is low, add a small amount of oil to the oil fill hole and recheck. Repeat until the oil level reaches the top of the dipstick. See Figure 24. NOTE: Do not overfill the unit. NOTE: Make sure the O-ring is in place on the oil fill plug/dipstick when checking and changing the oil. See Figure 24. CHANGING THE OIL For a new engine, change the oil after the first 10 hours of operation. Change the oil while the engine is still warm. The oil will flow freely and carry away more impurities. CAUTION: Wear gloves to prevent injury when handling the unit. 1. Unplug spark plug boot to eliminate starting. 2. Remove the oil fill plug/dipstick. 3. Pour the oil out of the oil fill hole and into a container by tipping the unit to a vertical position. Allow ample time for complete drainage. See Figure 25. FIGURE 25 4. Wipe up any oil residue on the unit and clean up any oil that may have spilled. Dispose of the oil according to Federal, State and Local regulations. 5. Refill the crankcase with 3.4 fluid ounce (100 ml) of SAE 30 SF, SG, SH oil. NOTE: For cold weather operation, where temperatures plummet below 40°F (4°C), use a high-quality SAE 10W30 weight oil of API (American Petroleum Institute) service class SF, SG, SH. NOTE: Measure the correct amount of oil and fill the unit with approximately 3.4 ounces (100 ml). Check the level with the dipstick. If the level is low, add a small amount of oil and recheck. Do not overfill. 6. Replace the oil fill plug/dipstick. 7. Reconnect the spark plug boot. 18 MAINTENANCE & REPAIR INSTRUCTIONS CARBURETOR SETTING The idle speed of the engine is adjustable through the air filter/muffler cover. See Figure 26. NOTE: Careless adjustments can seriously damage your unit. An authorized service dealer should make carburetor adjustments. Check Fuel Mixture Old or dirty fuel is usually the reason for improper unit performance. Drain and refill the tank with fresh fuel prior to making any adjustments. Refer to Oil and Fuel Information. Clean Air Filter The condition of the air filter is important to the operation of the unit. A dirty air filter will restrict air flow and change the air/fuel mixture. This is often mistaken for an out of adjustment carburetor. Check the condition of the air filter before adjusting the idle speed screw. Refer to Air Filter Maintenance. Adjusting the Idle Speed WARNING: The cutting head may spin during idle speed adjustment. Wear protective clothing and observe all safety instructions to prevent serious personal injury. If, after checking the fuel mixture and cleaning the air filter, the engine still will not idle, adjust the idle speed as follows: 1. Start the engine and let it run at a high idle for a minute to warm up. 2. Release the throttle trigger and let the engine idle. If the engine stops, engage the idle speed screw with a small screwdriver. See figure 26. Turn the idle speed screw in, clockwise, 1/8 of a turn at a time (as needed) until the engine idles smoothly. NOTE: The cutting head should not rotate when the engine idles. Idle Speed Screw FIGURE 26 3. If the cutting head rotates when the engine idles, turn the idle speed screw counterclockwise 1/8 of a turn at a time (as needed) to reduce idle speed. These procedures should solve most engine problems. If this isn’t the case, and: • The engine will not idle • The engine hesitates or stalls on acceleration • There is a loss of engine power Have the carburetor adjusted by an authorized service dealer. WARNING: After the unit is turned off, make sure the cutting head has stopped before you set down the unit. This will help prevent serious personal injury. ROCKER ARM CLEARANCE This procedure requires disassembly of the engine. If you feel unsure or unqualified to perform this, take the unit to an authorized service center. NOTE: Inspect the valve to rocker arm clearance with a feeler gauge after the first 10 hours of operation and then every 25 hours of operation thereafter....