Troubleshooting - MTD 679 cc Manual Del Operador

Troubleshooting

Problem
Engine Fails to start
Engine runs erratic
Engine overheats
Occasional skips
(hesitates) at
high speed
Idles poorly
12
Cause
1. Choke not activated.
2. Spark plug boot disconnected.
3. Fuel tank empty or stale fuel.
4. Faulty spark plug.
5. Reduced fuel flow/Blocked fuel filter.
6. Engine flooded.
7. Dead battery.
8. Blown fuse.
1. Spark plug boot loose.
2. Reduced fuel flow/Blocked fuel filter.
3. Vent in gas cap plugged.
4. Water or dirt in fuel system.
5. Dirty air cleaner.
6. Engine running with CHOKE activated.
1. Engine oil level low.
2. Air flow restricted.
1. Spark plug gap too close.
1. Spark plug fouled, faulty, or gap too wide.
2. Dirty air cleaner.
Remedy
1. Place throttle/choke control in CHOKE
position.
2. Connect wire to spark boot.
3. Fill tank with clean, fresh gasoline.
4. Clean, adjust gap, or replace.
5. Replace fuel filter as instructed in the
Maintenance section.
6. Crank engine with throttle in FAST position.
7. Recharge battery. See equipment operator's
manual.
8. Replace blown fuse. See equipment
operator's manual.
1. Connect and tighten spark plug boot.
2. Replace fuel filter as instructed in the
Maintenance section.
3. Clear vent.
4. Drain fuel tank. Refill with fresh fuel.
5. Replace air cleaner element and/or clean
pre-cleaner.
6. Move throttle/choke control out of CHOKE
position.
1. Fill crankcase with proper oil.
2. Clean grass clippings and debris from around
the engine's cooling fins and blower housing.
1. Remove spark plug and adjust gap.
1. Reset gap or replace spark plug.
2. Replace air cleaner element and/or clean
pre-cleaner.
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