MTD 450 Serie Manual Del Operador página 17

Troubleshooting
Problem
Engine Fails to start
Engine runs erratic
Engine overheats
Cause
1. Throttle lever not in correct starting position.
2. Spark plug wire disconnected.
3. Choke not in CHOKE position (if equipped).
4. Fuel tank empty or stale fuel.
5, Engine not primed Of equipped).
6. Faulty spark plug.
7. Blocked fuel line.
8. Engine flooded.
1. Spark plug boot loose.
2. Unit running on CHOKE (if equipped).
3. Blocked fuel line or stale fuel.
Remedy
Occastonal skips
(hesttates) at
high speed
Excessive Vibration 2. See authorized service dealer.
Unit does not discharge 1. Discharge area clogged. 1.
4. Lowengine RPM.
5. Water or dirt in fuel system.
6. Dirty air cleaner.
7. Carburetor out of adjustment.
1. Engine oil level low.
2. Dirty air cleaner.
3. Carburetor not adjusted properly.
1. Spark plug gap too close.
2. Carburetor idle mixture adjustment
improperly set.
1. Loose parts or damaged impeller.
2. Foreign object lodged in impeller.
3. Lowengine RPM.
]. Lowengine RPM.
2. Chipper blade dull.
Rate of discharge slows
considerably or composition
of discharged material
changes
1. Move throttle lever to FAST or START
position.
2. Connect wire to spark plug.
3. Move choke lever to CHOKE position.
4. Fill tankwkh clean, fresh gasoline.
S. Prime engine as instructed in Engine Manual.
6. Clean, adjust gap, or replace.
7. Clean fuel line.
8. Wait a few minutes to restart, but do not
prime.
1. Connectand tighten spark plug boot.
2. Move choke lever to OFF position.
3. Clean fuel line; fill tank with clean, fresh
gasoline.
4. Always run engine at full throttle.
5. Drain fuel tank. Refill with fresh fuel.
6. Refertoengine manual.
7. See authorized service dealer.
1. Fill crankcase with proper oil.
2. Refertoengine manual.
3. See authorized service dealer.
1. Remove spark plug and adjust gap to .030".
2. See authorized service dealer.
2,
Stop engine immediately and disconnect
spark plug wire. Clean flail screen and inside
of discharge opening.
Stop engine and disconnect spark plug wire.
Remove lodged object.
3. Always run engine at full throttle.
1. Always run engine at full throttle.
2. Replace chipper blade or see your authorized
service dealer.
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