Ryobi RY34427 User Manual - Page 16

MAINTENANCE LINE REPLACEMENT See Figures 17 - 19.  Stop the engine and disconnect the spark plug wire.  Rotate the spool clockwise as necessary to align the arrows on the spool with the eyelets in the string head housing. n Cut one piece of trimmer line 20 ft. long. Insert the line into the eyelet on the string trimmer housing. Push until the end of the line comes out the other side of the string head. Pull the line from the other side until equal amounts of line appear on both sides of the spool.  Rotate the spool clockwise to wind the line on the spool until approximately 6 in. of line is showing on each side.  Push the spool retainer down while pulling on line(s) to manually advance the line and to check for proper assembly of the string head. IDLE SPEED ADJUSTMENT See Figure 20. WARNING: The cutting head will move when adjusting the idle speed. Wear all protective clothing and keep all bystanders, children, and pets at least 50 ft. away. Make adjustments with the unit supported by hand so that the cutting head does not contact the ground or any object. Keep all parts of your body away from the cutting head and muffler. Failure to follow these instructions could result in serious personal injury. If the cutting attachment turns at idle, the idle speed screw needs adjusting on the engine. Turn the idle speed screw counterclockwise to reduce the idle RPM and stop the cutting attachment movement. If the cutting attachment still moves at idle speed, contact a service dealer for adjustment and discontinue use until the repair is made. WARNING: The cutting attachment should never turn at idle. Turn the idle speed screw counterclockwise to reduce the idle RPM and stop the cutting attachment, or contact a service dealer for adjustment and discontinue use until the repair is made. Serious personal injury could result from the cutting attachment turning at idle. CLEANING THE AIR FILTER See Figures 21 - 22. For proper performance and long life, keep air filter screen clean.  Remove the air filter cover. To remove, push up on the latch at the bottom of the cover and gently pull the cover up.  Remove the air filter.  Clean the foam filter element with warm soapy water. Rinse and let dry. NOTE: If the foam filter element is damaged, it should be replaced.  Apply a light coat of engine lubricant to the foam filter element, then squeeze it out.  Reinstall the air filter. NOTE: Make sure the filter is seated properly inside the cover. Installing the filter incorrectly will allow dirt to enter the engine, causing rapid engine wear.  Replace the air filter cover by placing the slots on the air filter cover over the tabs on the housing, then push the cover down until it latches securely in place. FUEL CAP, TANK, AND LINES WARNING: Check for fuel leaks. A leaking fuel cap, tank, or line is a fire hazard and must be replaced immediately. If you find any leaks, correct the problem before using the product. Failure to do so could result in a fire that could cause serious personal injury. The fuel cap contains a non-serviceable filter and a check valve. A clogged fuel filter will cause poor engine performance. If performance improves when the fuel cap is loosened, check valve may be faulty or filter clogged. Replace fuel cap if required. SPARK PLUG REPLACEMENT This engine uses an Champion RY4C, Ryobi AC00164A or equivalent spark plug with .025 in. electrode gap. Use a recommended or equivalent replacement and replace a­ nnually. NOTICE: Be careful not to cross-thread the spark plug. Crossthreading will seriously damage the product. CHANGING ENGINE LUBRICANT See Figure 23. WARNING: Do not change engine lubricant while it is hot. Accidental contact with hot engine lubricant could result in serious burns. For best performance, engine lubricant should be changed after every 25 hours of operation. To change the engine lubricant:  Stop the engine and disconnect the spark plug wire. Allow the engine to cool completely before proceeding.  Remove the screw from the top engine cover and set aside. 12 - English