Cub Cadet SC 100 H Operation Manual - Page 12

Troubleshooting

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Troubleshooting 5 Problem Engine fails to start Engine runs erratic Engine overheats Occasional skips (hesitates) at high speed Idles poorly Excessive vibration/noise Mower will not mulch grass (if equipped) Uneven cut Cause Remedy 1. Blade control disengaged. 2. Spark plug boot disconnected. 3. Fuel tank empty or stale fuel. 4. Engine not primed (if equipped with primer). 5. Faulty spark plug. 6. Blocked fuel line. 7. Engine flooded. 8. Fuel valve (if equipped) closed. 9. Engine not choked (if equipped with choke). 1. Spark plug boot loose. 2. Blocked fuel line or stale fuel. 3. Vent in gas cap plugged. 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. Engage blade control. 2. Connect wire to spark boot. 3. Fill tank with clean, fresh gasoline. 4. Prime engine as instructed in the Engine Operator's Manual. 5. Clean, adjust gap, or replace. 6. Clean fuel line. 7. Wait a few minutes to restart; do not prime. 8. Open fuel valve. See Engine Operator's Manual. 9. Choke engine. See Engine Operator's Manual. 1. Connect and tighten spark plug boot. 2. Clean fuel line; fill tank with clean, fresh gasoline. 3. Clear vent. 4. Drain fuel tank. Refill with fresh fuel. 5. Refer to Engine Operator's Manual. 6. Push CHOKE knob in. 1. Fill crankcase with proper oil. 2. Clean area around and on top of engine. 1. Adjust spark plug gap. Refer to Engine Operator's Manual. 1. Spark plug fouled, faulty, or gap too wide. 2. Dirty air cleaner. 1. Cutting blade loose or unbalanced. 2. Bent/damaged blade or blade adapter. 1. Wet grass. 2. Excessively high grass. 3. Dull blade. 1. Wheels not positioned correctly. 2. Dull blade. 1. Reset gap or replace spark plug. 2. Refer to Engine Operator's Manual. 1. Tighten blade and adapter. Balance blade. 2. See an authorized service dealer. 1. Do not mow when grass is wet; wait until dry to cut. 2. Mow once at a high cutting height, then mow again at desired height or make a narrower cutting path. 3. Sharpen or replace blade. 1. Place front and rear wheels in same height position. (Dual lever height adjusters only) 2. Sharpen or replace blade. 12

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Troubleshooting
5
12
Problem
Cause
Remedy
Engine fails to start
1. Blade control disengaged.
2. Spark plug boot disconnected.
3.
Fuel tank empty or stale fuel.
4.
Engine not primed (if equipped with primer).
5. Faulty spark plug.
6. Blocked fuel line.
7. Engine flooded.
8. Fuel valve (if equipped) closed.
9.
Engine not choked (if equipped with choke).
1. Engage blade control.
2. Connect wire to spark boot.
3.
Fill tank with clean, fresh gasoline.
4.
Prime engine as instructed in the Engine
Operator’s Manual.
5. Clean, adjust gap, or replace.
6. Clean fuel line.
7.
Wait a few minutes to restart; do not
prime.
8.
Open fuel valve. See Engine Operator’s Manual.
9.
Choke engine. See Engine Operator’s Manual.
Engine runs erratic
1. Spark plug boot loose.
2.
Blocked fuel line or stale fuel.
3. Vent in gas cap plugged.
4.
Water or dirt in fuel system.
5. Dirty air cleaner.
6.
Unit running with CHOKE (if equipped) applied.
1.
Connect and tighten spark plug boot.
2.
Clean fuel line; fill tank with clean, fresh
gasoline.
3. Clear vent.
4.
Drain fuel tank. Refill with fresh fuel.
5. Refer to Engine Operator’s Manual.
6. Push CHOKE knob in.
Engine overheats
1. Engine oil level low.
2. Air flow restricted.
1.
Fill crankcase with proper oil.
2.
Clean area around and on top of engine.
Occasional skips
(hesitates) at
high speed
1.
Spark plug gap too close.
1.
Adjust spark plug gap. Refer to Engine
Operator’s Manual.
Idles poorly
1.
Spark plug fouled, faulty, or gap too wide.
2. Dirty air cleaner.
1.
Reset gap or replace spark plug.
2. Refer to Engine Operator’s Manual.
Excessive vibration/noise
1.
Cutting blade loose or unbalanced.
2. Bent/damaged blade or blade adapter.
1.
Tighten blade and adapter. Balance blade.
2. See an authorized service dealer.
Mower will not
mulch grass (if equipped)
1. Wet grass.
2. Excessively high grass.
3. Dull blade.
1.
Do not mow when grass is wet; wait until
dry to cut.
2.
Mow once at a high cutting height, then mow
again at desired height or make a narrower
cutting path.
3. Sharpen or replace blade.
Uneven cut
1. Wheels not positioned correctly.
2. Dull blade.
1.
Place front and rear wheels in same height
position. (Dual lever height adjusters only)
2. Sharpen or replace blade.