Troubleshooting - Cub Cadet PR-521 Operator's Manual

SECTION 9: TROUBLE SHOOTING GUIDE
Trouble Possible Cause(s)
Engine fails 1. Control handle disengaged.
to start 2. Spark plug wire
disconnected.
3. Dirty air cleaner.
4. Primer button not depressed.
5. Fuel tank empty or stale fuel.
6. Blocked fuel line.
7. Faulty spark plug.
8. Engine flooded.
Engine runs 1. Spark plug wire loose.
erratic
2. Blocked fuel line or stale fuel.
3. Carburetor out of
adjustment.
Engine 1. Engine oil level low.
overheats 2. Dirty aircleaner.
3. Air flow restricted.
4. Carburetor not adjusted.
Occasional 1. Spark plug gap too close.
skip 2. Carburetor idle mixture
(hesitates) adjustment improperly set.
at high
speed
Idles poorly 1. Spark plug fouled, faulty or
gap too wide.
2. Carburetor not adjusted.
Excessive 1. Cutting blade loose or
vibration unbalanced.
2. Bent cutting blade.
Mower will 1. Wet grass.
not mulch 2. Excessively high grass.
grass
Uneven cut 1. Wheels positioned
incorrectly.
2. Dull blade.
NOTE:
For repairs beyond the minor adjustments above, contact your local Cub Cadet dealer or call the Customer
Dealer Referral Line at 1(800)-528-1009.
Corrective Actions
1. Engage blade control handle.
2. Connect wire to spark plug.
3. Refer to the engine manual packed with your
unit.
4. Refer to the engine manual.
5. Clean fuel line.
6. Clean, adjust gap or replace.
7. Refer to the engine manual.
8. Wait for a while and crank the engine.
1. Connect and tighten spark plug wire. Check
spark plug for fouling.
2. Clean fuel line; fill tank with clean, fresh gasoline.
3. Refer to the engine manual packed with your
unit.
1. Fill crankcase with proper oil.
2. Refer to the engine manual.
3. Stop engine and disconnect spark plug wire.
Remove blower housing and clean.
4. Refer to the engine manual.
1. Adjust gap to.030".
2. Refer to the engine manual.
1. Reset gap to.030" or replace spark plug.
2. Refer to the engine manual.
1. Tighten blade and adapter. Balance blade.
2. Replace blade.
1. Wait until later to cut.
2. Mow once at a high cutting height, then mow
again at desired height.
1. Place all four wheels in same height position.
2. Sharpen or replace blade.
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