Troubleshooting - Cub Cadet 421R Operator's Manual

SECTION 8: TROUBLESHOOTING GUIDE
Problem
Engine fails to start 1.
2.
3.
4.
5.
6.
Engine runs erratic 1.
2.
3.
4.
Engine overheats 1.
2.
Loss of power 1.
2.
3.
Excessive vibration 1.
Unit fails to self-propel 1.
2.
Unit fails to discharge 1.
snow
2.
3.
4.
NOTE: For repairs beyond the minor adjustments listed above, call the Customer Dealer Line at 1-800-528-1009 for
the dealer nearest you. Refer to separate engine manual, packed with your snow thrower, for engine information.
Cause
Fuel tank empty, or stale fuel
Blocked fuel line
Key not in ON position
Spark plug wire disconnected
Faulty spark plug
Gasoline and oil not mixed correctly
Unit running on choke
Fuel line blocked, or stale fuel
Water or dirt in fuel system
Carburetor out of adjustment
Gasoline and oil not mixed correctly
Carburetor out of adjustment
Spark plug wire loose
Vent in gas cap plugged
Exhaust port plugged.
Loose parts or damaged auger
Drive cable out of adjustment
Drive belt loose or damaged
Discharge chute clogged
Foreign object lodged in auger
Drive cable not adjusted properly
Drive belt loose or damaged
1. Fill tank with clean fresh gasoline/oil
mixture as specified in the engine manual.
2. Clean fuel line
3. Insert key and turn to ON position
4. Connect wire to spark plug.
5. Clean spark plug, readjust gap, or replace.
6. Refer to engine manual
1. Move choke lever to off position.
2. Clean fuel line and fill tank with fresh,
clean gasoline.
3. Refer to engine manual on remedy.
4. Refer to engine manual.
1. Drain fuel tank and refill with proper fuel
mixture.
2. Refer to engine manual.
1. Connect and tighten spark plug wire.
2. Clear vent.
3. Clean port.
1. Stop engine immediately and disconnect
spark plug wire. Check for possible
damage. Tighten all bolts and nuts. Repair
as needed. If the problem persists, take
unit to an authorized service dealer.
1. Adjust drive cable following instructions on
snow thrower.
2. Replace drive cable following instructions
on snow thrower.
1. Stop engine immediately and disconnect
spark plug wire. Clean discharge chute
and the auger housing.
2. Stop engine immediately and disconnect
spark plug wire. Remove object .
3. Adjust drive cable following instructions on
snow thrower.
4. Replace drive belt following instructions
on snow thrower.
12
Remedy