Ryobi RY3716 Operation Manual - Page 37

MAINTENANCE CLEANING THE ENGINE See Figures 67 - 68. Clean the cylinder fins and flywheel fins with compressed air periodically. Dangerous overheating of the engine may occur due to impurities on the cylinder. WARNING: Never run the saw without all the parts, including the clutch cover and starter housing, securely in place. Because parts can fracture and pose a danger of thrown objects, leave repairs of the flywheel and clutch to factory trained qualified service center personnel. NOTE: If you notice a power loss with the gas-­ powered tool, the exhaust port and muffler may be blocked with carbon deposits. These deposits may need to be removed to restore performance. CHECKING THE FUEL FILTER See Figure 69. Check the fuel filter periodically. Replace it if contaminated or damaged. REPLACING THE SPARK PLUG See Figure 70. This engine uses a Bosch WSR6F or Torch L7RTC spark plug with .025 in. (0,64 mm) electrode gap. Use an exact replacement and replace every 50 hours or more frequently, if necessary. NOTICE: Allow engine to cool before removing spark plug. Removing spark plug from a hot engine can cause serious damage to the chain saw. n Loosen the spark plug by turning it counterclockwise with a wrench. n Remove the spark plug. n Hand thread the new spark plug, turning it clockwise. Tighten securely with wrench. NOTE: Be careful not to cross-thread the spark plug. Cross-threading will damage the cylinder. CLEAN FLYWHEEL FINS Fig. 68 FUEL FILTER LOOSEN Fig. 69 TIGHTEN Fig. 70 Page 37 - English