Husqvarna Snow Blower Cover Owner Manual - Page 9

Noisy Engine Engine runs poorly in high speed range Engine lacks power Excessive Valve Chatter 1. Too large valve clearance Adjust 2. Weakened or broken valve spring Replace 3. Worn tappet or cam lobe Replace 4. Worn and burnt camshaft journal Replace Noise seems to come from piston 1. Worn down piston or cylinder Replace 2. Fouled with carbon combustion chamber Clean 3. Worn piston pin or piston pin bore Replace 4. Worn piston rings or ring grooves Replace Noise seems to come from crankshaft 1. Rattling bearings due to wear Replace 2. Worn and burnt main bearings Replace 3. Worn and burnt pin bearing Replace 4. Too large endplay Adjust Noise seems to come from outside of engine 1. Loose trim item Tighten Defective engine internal/electrical parts 1. Weakened valve springs Replace 2. Worn camshaft Replace 3. Valve timing out of adjustment Adjust 4. Too narrow spark plug gaps Adjust 5. Defective ignition coil Replace 6. Clogged air cleaner element Replace 7. Clogged fuel line, resulting in inadequate fuel supply Replace to carburetor 8. Worn bearings Replace 9. Blown head gasket Replace 10. Ignition coil air gap too wide Adjust 11. Dirty/gummed up carburetor Clean 12. Stale fuel Replace Defective air flow system 1. Carburetor gasket leak - sucking air causing engine to Replace run lean Defective engine internal/electrical parts 1. Loss of valve clearance Adjust 2. Weakened valve springs Replace 3. Out of adjustment valve timing Adjust 4. Worn piston ring or cylinder Replace 5. Poor seating of valves Replace 6. Fouled spark plug Replace 7. Incorrect spark plug Replace 8. Clogged air filter element Replace 9. Carburetor gasket leak - sucking air causing engine to Replace run lean 10. Too much engine oil Adjust 11. Air fins clogged on engine causing to overheat Remove debris 12. Not enough oil in engine Adjust Rev:010410 Copyright © 2010 Liquid Combustion Technology, LLC LCT Engine Service Manual: 208cc, 291cc & 414cc 8