Poulan 2750 User Manual - Page 15

6. Clean the spark arresting screen with a wire brush. Replace screen if any wires are broken or screen is blocked after cleaning. 7. Reinstall spark arresting screen. 8. Reinstall outlet cover and 2 screws. En- sure outlet cover and both screws are reinstalled correctly to prevent damage to the saw (see illustrations). The exhaust outlets must face the chain brake (bar side) of the saw. Outlet Cover To maintain guide bar: S Move ON/STOP switch to the STOP posi- tion. S Loosen and remove chain brake nuts and chain brake. Remove bar and chain from saw. S Clean the oil holes and bar groove after each 5 hours of operation. Remove Sawdust From Guide Bar Groove Oil Holes Exhaust Outlets Exhaust Outlets must face chain brake (bar side) of chain saw 9. Inspect the muffler gasket and replace if damaged. 10. Reinstall backplates, muffler gasket and muffler using muffler bolts. Tighten until secure. 11. Reinstall bolt cover and locknut. 12. Reinstall the spark plug boot. 13. Reinstall the cylinder cover and 3 screws. Tighten securely. CARBURETOR ADJUSTMENTS WARNING: The chain will be mov- ing during most of this procedure. Wear your protective equipment and observe all safety precautions. The chain must not move at idle speed. The carburetor has been carefully set at the factory. Adjustments may be necessary if you notice any of the following conditions: S Chain moves at idle. See IDLE SPEED--T adjusting procedure. S Saw will not idle. See IDLE SPEED--T adjusting procedure. Idle Speed--T Allow engine to idle. If the chain moves, idle is too fast. If the engine stalls, idle is too slow. Adjust speed until engine runs without chain movement (idle too fast) or stalling (idle too slow). S Turn idle speed screw (T) clockwise to increase engine speed. S Turn idle speed screw (T) counterclockwise to decrease engine speed. If you require further assistance or are unsure about performing this procedure, contact your authorized service dealer or call 1--800--554--6723. BAR MAINTENANCE If your saw cuts to one side, has to be forced through the cut, or been run with an improper amount of bar lubrication it may be necessary to service your bar. A worn bar will damage your chain and make cutting difficult. After each use, ensure ON/STOP switch is in the STOP position, then clean all sawdust from the guide bar and sprocket hole. S Burring of guide bar rails is a normal process of rail wear. Remove these burrs with a flat file. S When rail top is uneven, use a flat file to restore square edges and sides. File Rail Edges and Sides Square Worn Groove Correct Groove Replace guide bar when the groove is worn, the guide bar is bent or cracked, or when excess heating or burring of the rails occurs. If replacement is necessary, use only the guide bar specified for your saw in the repair parts list or on the decal located on the chain saw. CHAIN SHARPENING Chain sharpening is a complicated task that requires special tools. We recommended you refer chain sharpening to a professional chain sharpener. IGNITION TIMING Ignition timing is fixed and nonadjustable. SPARK PLUG The spark plug should be replaced each year to ensure the engine starts easier and runs better. 1. Loosen 3 screws on cylinder cover. 2. Remove the cylinder cover. 3. Pull off the spark plug boot. 4. Remove spark plug from cylinder and discard. 5. Replace with Champion RCJ--7Y spark plug and tighten securely with a 3/4 inch socket wrench. Spark plug gap should be 0.025 inches. 6. Reinstall the spark plug boot. 7. Reinstall the cylinder cover and 3 screws. Tighten securely. Spark Plug Boot 15