MAINTENANCE AND REPAIR INSTRUCTIONS
Fig. 22
5. Push the trimmer line until it lies flat against the cutting head (Fig. 23). Make sure the two lengths of cutting line are of equal length. If they are not, adjust until they are.
Fig. 23
WARNING: Always use the correct line length when installing trimming line on the unit. If the two lengths of cutting line are not of equal length, the unit may develop a vibration.
CHECKING THE OIL LEVEL
WARNING: 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 the engine and allow oil to drain into the crankcase.
2.Place the unit on a flat, level surface to get a proper oil level reading.
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. Oil should be up to the top of the dipstick (Fig. 24).
Oil Fill Plug/Dipstick
Full 
Add
Top of Dipstick
Fig. 24
6.If the level is low, add a small amount of oil to the oil fill hole and recheck (Fig. 25). Repeat this procedure until the oil level reaches the top of the dipstick.
NOTE: Do not overfill the unit.
NOTE: Make sure the
Oil Fill Plug/Dipstick 
Oil Fill Hole 
Fig. 25
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.
1.Unplug spark plug boot to prevent accidental starting.
2.Remove the oil fill plug/dipstick.
CAUTION: Wear gloves to prevent injury when handling the unit.
3.Pour the oil out of the oil fill hole and into a container by tipping the unit to a vertical position (Fig. 26). Allow ample time for complete drainage.
Fig. 26
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 3.04 fluid ounce (90 ml) of SAE 30 SF, SG, SH oil.
NOTE: Use the bottle and spout saved from initial use to measure the correct amount of oil. The top of the label on the bottle measures approximately 3.4 ounces (100 ml) (Fig. 27).
Check the level with the dipstick. If the level is low, add a small amount of oil and recheck. Do not overfill (Fig. 27).
Fill Level
Fig. 27
6.Replace the oil fill plug/dipstick.
7.Reconnect the spark plug boot.
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