Troubleshooting - MTD 21AA412A000 Operator's Manual

Rear tine tiller
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Troubleshooting
Problem
Engine fails to start
Cause
1, Fuel tankempty,
or stale fuel.
1.
2. Throttle
control
lever not in correct starting
2.
position
(if equipped).
3. Blocked fuel line.
3.
4. Dirty air cleaner.
4.
5. Choke not in ON posit=on,
5.
6. Spark plug wire disconnected.
6,
7. Faulty spark plug,
7.
8. Engine flooded.
8.
1. Tiller running
on CHOKE.
1.
2. Spark plug wire loose.
2.
3. Blocked fuel line or stale fuel.
3.
4. Ventin
gas cap plugged.
4.
5. Water or dirt in fuel system.
5.
6. Dirty air cleaner.
6.
7. Carburetor
out of adjustment.
7.
1. Engine oil level low.
1.
2. Dirty air cleaner.
2.
3. Air flow restricted.
3.
4. Carburetor
not adjusted
properly.
4.
1. Foreign object lodged in tines.
1.
2. Tine clevis pin(s) missing.
2.
3. Pulley and idler not in correct adjustment.
3.
4. Not shifting
properly.
4.
5. Control
cable notadjusted
properly.
5.
6. Belt worn and/or stretched.
6.
Engine runs erratic
Engine overheats
Tines do not engage
Tines skip over ground
Wheels do not engage
1. Improper
rotation.
1. Clevis pin missing.
2. Tiller is not being shifted
properly.
3. Control
cable notadjusted
properly.
4. Belt worn and/or stretched.
1.
1.
2.
3.
4.
Remedy
Fill tank with clean, fresh gasoline.
Move throttle
lever to start position.
Clean fuel line,
Refer to the Engine Operator's
Manual
Move switch to ON position.
Connect wire to spark plug,
Clean, adjust gap or replace.
Refer to the Engine Operator's
Manual
Move choke lever to OFF position.
Connect and tighten
spark plug wire.
Clean fuel line; fill tank with clean, fresh
gasoline.
Clear vent.
Drain fuel tank. Refill with fresh fuel.
Refer to the Engine Operator's
Manual
Refer to the Engine Operator's
Manual
Fill crankcase with proper oil.
Refer to the Engine Operator's
Manual
Refer to the Engine Operator's
Manual
Adjust carburetor
as instructed
in the Engine
Operator's
Manual
Dislodge foreign
object.
Replace tine clevis pin(s).
Take tiller to authorized
service dealer.
Refer to the Operation
Section for proper
shifting
procedures.
Adjust control
cable
Replace belt.
Forward rotation
should
only be used on soil
that has already been tilled, not on virgin soil.
Replace clevis pin.
Refer to Operation
Section for proper
shifting
procedures.
Adjust control
cable
Replace belt.

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