User manual HUSQVARNA ENGINES

[. . . ] Shaft Detail - This column references a chart that designates which LCT engineering drawing corresponds to the PTO shaft. Horsepower - This column is coded to designate the engine’s power output (horsepower) with its corresponding size (cubic centimeters). Paint Code - This column is coded to which color scheme the engine is equipped with. Starter Type - This column is coded to which type of starting system the engine is equipped with. [. . . ] Is the engine flooded? Using an incorrect spark plug may cause engine damage. Rev:010410 Copyright © 2010 Liquid Combustion Technology, LLC LCT Engine Service Manual: 208cc, 291cc & 414cc 5 General Troubleshooting Engine stops running: 2. position and after starting pushed right to the off position. If engine is equipped with turned to the run position. If engine still does not start move to half choke and pull twice. START RUN Twist Choke Snow Summer 4. Is the spark plug corroded? Using an incorrect spark plug may cause engine damage. OFF 6. Is the fuel petcock turned to the on position? ON 7. Is the throttle set too low (variable speed models only)? Rev:010410 Copyright © 2010 Liquid Combustion Technology, LLC LCT Engine Service Manual: 208cc, 291cc & 414cc 6 Advanced Troubleshooting Complaint Engine will not start, or is hard to start Compression too low – For Authorized LCT Technicians Remedy Adjust Repair or Replace Adjust Replace Replace Retighten Replace Symptom and possible causes 1. Worn valve guides or poor seating of valves 3. Kill switch in “OFF” position 6. Ignition coil failure No fuel reaching the intake manifold 1. Fuel tank is empty Replace Dry off Replace Replace Switch to “On” Reset Replace Replace Clean Turn on Fill Adjust Replace or Repair Replace Replace Adjust or replace Replace Adjust Clean Replace Clean Replace Replace Adjust Engine idles poorly 1. Stale fuel Engine stalls easily 1. Valves out of adjustment Rev:010410 Copyright © 2010 Liquid Combustion Technology, LLC LCT Engine Service Manual: 208cc, 291cc & 414cc 7 Noisy Engine Excessive Valve Chatter 1. Worn and burnt camshaft journal Noise seems to come from piston 1. Fouled with carbon combustion chamber 3. Worn piston rings or ring grooves Noise seems to come from crankshaft 1. Too large endplay Noise seems to come from outside of engine 1. Loose trim item Tighten Replace Replace Adjust Adjust Replace Replace Replace Replace Replace Adjust Clean Replace Replace Replace Replace Replace Adjust Replace Clean Replace Replace Adjust Replace Replace Replace Engine runs poorly in high speed range Defective engine internal/electrical parts 1. Clogged fuel line, resulting in inadequate fuel supply to carburetor 8. Stale fuel Defective air flow system 1. [. . . ] Too lean fuel mixture Spark Plug Service Cross References Using an incorrect spark plug may cause engine damage. 2. Remove the spark plug with a 13/16-inch spark plug wrench. Replace it if the electrodes are worn or if the insulator is cracked or chipped. Spark plug gap should be set to 0. 027 - 0. 030 inches. [. . . ]