Troubleshooting - MTD 159 Manual Del Operador

Troubleshooting

Problem
Engine Fails to start
Engine runs erratic
Engine overheats
Occasional skips
(hesitates) at
high speed
Idles poorly
Engine stalls with full tank
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Cause
1. Blade control disengaged (Lawn mower
only).
2. Spark plug boot disconnected.
3. Fuel tank empty or stale fuel.
4. Fuel shut-off valve closed (if equipped).
5. Engine not primed (if equipped with primer).
6. Faulty spark plug.
7. Reduced fuel flow/Blocked fuel filter.
8. Engine flooded.
9. Engine not choked (if equipped with choke).
10. Burnt fuse. (Electric Start only)
1. Spark plug boot loose.
2. Reduced fuel flow/Blocked fuel filter.
3. Vent in gas cap plugged (if equipped).
4. Water or dirt in fuel system.
5. Dirty air cleaner.
6. Unit running with CHOKE (if equipped)
applied.
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.
1. Carbon canister vent line(s) pinched/kinked.
Remedy
1. Engage blade control.
2. Connect wire to spark boot.
3. Fill tank with clean, fresh gasoline.
4. Turn on fuel shut-off valve.
5. Prime engine as instructed in the Operation
section.
6. Clean, adjust gap, or replace.
7. Replace fuel filter as instructed in the
Maintenance section.
8. Wait a few minutes to restart, but do not
prime.
9. Choke engine. See engine manual.
10. Replace fuse (see Service Section of Unit).
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. Refer to engine manual.
6. Push CHOKE knob in.
1. Fill crankcase with proper oil.
2. Clean area around and on top of engine.
1. Adjust gap to .030".
1. Reset gap to .030" or replace spark plug.
2. Refer to engine manual.
1. Refer to Carbon Canister Filter Service
section to remove engine shroud and relieve
pinched/kinked vent line(s). Re-install engine
shroud making sure vent line(s) are not
pinched or kinked.
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