Echo QV-8000 Instruction Manual page 17

Trouble
4. Engine lacks power.
5. Engine overheats.
6. Engine noisy or
knocking.
7. Engine "stalls" under
load.
8. No oil on chain.
9. Chain brake fails to
work.
10. Chain binds.
11. Chain is loose on
bar.
TROUBLESHOOTING
Cause
• Air cleaner clogged.
• Carburetor out of adjustment.
• Muffler clogged.
• Clogged exhaust ports.
• Poor compression.
• Insufficient oil in fuel mixture.
• Airflow obstructed.
• Spark plug incorrect heat range.
• Worn bearings, piston rings or
cylinder walls.
• Carburetor main adjustment too
"lean".
• Engine overheats.
• Empty oil tank.
• Oil filter clogged.
• Automatic oiler output set too low.
• Chain brake adjustment.
• Chain tension too tight.
• Chain tension is too loose.
• Clean air cleaner.
• See "Carburetor Adjustment".
• Clean carbon from muffler.
• Remove muffler, rotate engine until
the piston is at bottom of cylinder.
With a wooden scraper or blunt tool,
remove all carbon from exhaust ports.
Be careful not to scratch or damage
piston or cylinder walls. Blow out
loose carbon with compressed air.
Start engine and run briefly to remove
all carbon, then install muffler and
gasket.
• Contact your nearest authorized
dealer.
• Mix fuel as shown in starting
instructions.
• Clean flywheel and cylinder fins.
• Replace with plug specified for
engine.
• Contact your nearest authorized
dealer.
• See "Carburetor adjustment".
• See "Cleaning cylinder fins" in
maintenance section.
• Fill tank.
• Replace filter.
• Adjust oiler output.
• Adjust chain brake.
• Adjust chain tension.
• Adjust chain tension.
15
What to do
QV-8000 TYPE1-E