Troubleshooting - MTD 500 thru 510 Operator's Manual

SECTION 8: TROUBLESHOOTING
Problem
Engine fails to start
Engine runs erratic
Engine overheats
NOTE: For repairs beyond the minor adjustments listed above, contact your nearest authorized service dealer.
Cause
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.
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.
1. Connect wire to spark plug.
2. Fill tank with clean, fresh gasoline.
3. Move throttle lever to FAST position.
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.
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.
13
Remedy