Ryobi RY3716 Operation Manual - Page 36

MAINTENANCE CARBURETOR COLD WEATHER MECHANISM See Figures 65 - 66. The chain saw is designed with a ventilation hatch on the right side of the cylinder cover which allows warm air to be supplied from the engine to the carburetor to help prevent icing under colder operating conditions. Operating the chain saw in temperatures from 32ºF to 41ºF (0ºC to 5ºC) at times of high humidity may result in ice forming within the carburetor. This can cause the output power of the engine to be reduced and/or the engine to fail to operate smoothly. When operating under these circumstances, the chain saw should be placed in cold weather mode before use. To switch to cold weather mode: n Place the on/stop switch in the OFF ( ) ­position. n Remove the air filter cover. n Remove the air filter. n Lift choke knob up to remove from the cylinder cover. n Loosen the four screws holding the cylinder cover in place. Remove the cylinder cover. n Remove the icing cap located on the right-hand side of the cylinder cover by pressing down on it with your finger. n Adjust the icing cap so that the "snow" mark faces upward, then return it to its original position in the cylinder cover. n Replace the cylinder cover and reinstall screws to secure. n Replace choke knob, air filter, and air filter cover. NOTICE: Always return the unit to normal operating mode if there is no chance of icing occurring. Continuing to use the chain saw in cold weather mode when temperatures have risen and returned to normal may result in the engine not starting properly or in the engine not operating at its normal speed. AIR FILTER SNOW SUN SUN SNOW CHOKE KNOB LOCATION OF ­CYLINDER 1 COVER SCREWS 2 CLEAN CYLINDER FINS AIR FILTER COVER CYLINDER COVER ICING CAP Fig. 65 4 3 Fig. 66 Page 36 - English Fig. 67