Husqvarna TE 250 - 310 2011 I.E. Workshop Manual page 26

ENGINE
Trouble
Engine does not start or
has starting trouble
Engine stalls
easily
Engine is noisy
Noise seems to come
from secondary drive
chain
TROUBLESHOOTING
Cause
Insufficient compression
1. Piston seized
2. Connecting rod small or big end seized
3. Worn piston rings
4. Worn cylinder
5. Cylinder head loosely tightened
6. Head gasket leaking
7. Spark plug loose
8. Incorrect valve clearances
9. Weak or seized valve springs
10. Seized valves
Weak or no spark
1. Spark plug faulty
2. Fouled or wet spark plug
3. Spark plug electrode gap too wide
4. Ignition coil faulty
5. High-tension cables open circuit or shorted
6. Electronic control unit faulty
7. Right-hand switch faulty (TE - TXCi)
1. Fouled spark plug
2. Electronic control unit faulty
3. Carburettor jets clogged
4. Low idle
Noise seems to come from piston
1. Too much piston-to-cylinder clearance
2. Worn piston rings or piston grooves
3. Too much carbon build-up in
combustion chamber or on piston crown
4. Valve clearances too large
5. Weak or seized valve springs
6. Worn timing chain
7. Incorrect timing chain tension
Noise seems to come from crankshaft
1. Worn main bearings
2. Connecting rod big end has too much side clearance or end float Replace
3. Crankshaft gear damaged
4. Crankshaft locknut loose
Noise seems to come from the clutch
1. Worn plates
2. Too much clearance between clutch housing and friction plates
Noise seems to come from gearbox
1. Worn gears
2. Worn gear grooves
1. Chain stretched (worn) or improperly adjusted
2. Worn transmission sprocket and rear chain sprocket
C.2
Remedy
Replace
Replace
Replace
Replace
Tighten
Replace
Tighten
Adjust
Replace
Replace
Replace
Clean or dry
Adjust
Replace
Check
Replace
Replace
Clean
Replace
Clean
Adjust
Replace
Replace
Clean
Adjust
Replace
Replace
Adjust
Replace
Replace
Tighten
Replace
Replace
Replace
Replace
Replace or adjust
Replace
Ed. 07-2010