Echo QV-680 Instruction Manual - Troubleshooting

13

QV-680

TROUBLESHOOTING

Trouble

1. Engine fails to start.

2. Engine hard start.

3. Engine misses.

Cause

• No fuel in tank.

• Fuel filter clogged.

• Fuel line clogged.

• Spark plug shorted or fouled.

• Spark plug broken (cracked

porcelain or electrodes broken).

• Ignition lead wire shorted, broken

or disconnected from spark plug.

• lgnition inoperative (no spark from

lead wire).

• Water in gasoline or stale fuel

mixture.

• Too much oil in fuel mixture.

• Engine over or under choked.

• Carburetor out of adjustment.

• Gasket leaks (carburetor or

cylinder base gasket).

• Weak spark at spark plug.

• Dirt in fuel line or carburetor.

• Carburetor improperly adjusted.

• Spark plug fouled, broken or

incorrect gap setting.

• Weak or intermittent spark at spark

plug.

What to do

• Fill tank.

• Replace filter.

• Clean fuel line.

• Install new spark plug.

• Replace spark plug.

• Replace lead wire or attach to spark

plug.

• Contact your nearest authorized

dealer.

• Drain entire system and refill with

fresh fuel.

• Drain and refill with correct mixture.

• If flooded by over choking, proceed

according to instructions in previous

section. If under choked, move choke

knob to closed position and crank two

or three times.

• See “Carburetor adjustment”.

• Contact your nearest authorized

dealer.

• Contact your nearest authorized

dealer.

• Remove and clean.

• See “Carburetor adjustment” in

maintenance section.

• Clean or replace spark plug - set gap

to 0.6 - 0.7 mm (0.024 to 0.028 in.).

• Contact your nearest authorized

dealer.