Troubleshooting - MTD 550 Series Operator's Manual

SECTION 8: TROUBLESHOOTING
Problem Cause
Engine fails to start
Engine runs erratic
1. Spark plug wire disconnected.
2. Fuel tank empty or stale fuel.
3. Throttle control lever not in correct
starting position. (If Equipped)
4. Choke not in CHOKE position.
(If Equipped)
5. Engine not primed properly.
6. Blocked fuel line.
7. Faulty spark plug.
1. Spark plug wire loose.
2. Unit running on CHOKE.
(If Equipped)
3. Blocked fuel line or stale fuel.
Remedy
1. Connect wire to spark plug.
2. Fill tank with clean, fresh gasoline.
3. Move throttle lever to FAST position.
4. Water or dirt in fuel system.
5. Dirty air cleaner.
6. Carburetor out of adjustment.
1. Engine oil level low.
2. Dirty air cleaner.
3. Carburetor not adjusted properly.
4. Move choke to CHOKE position.
5. Prime engine.
6. Clean fuel line.
7. Clean, adjust gap, or replace.
1. Connect and tighten spark plug wire.
2. Move choke lever to OFF position.
Engine overheats
NOTE: For repairs beyond the minor adjustments listed above, contac_ _our nearest authorized service dealer.
3. Clean fuel line; fill tank with clean, fresh
gasoline
4. Drain fuel tank. Refill with fresh fuel.
5. Clean or replace air cleaner.
6. See authorized service dealer.
1. Fill crankcase with proper oil.
2. Clean or replace air cleaner.
3. See authorized service dealer.
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