Troubleshooting - Craftsman 31AH54SG793 Operator's Manual

This section addresses minor service issues. To locate the nearest Sears Service Center or to schedule service, simply contact Sears at 1-800-4-MY-HOME®.
Problem
Engine fails to start
Engine running erratically/
inconsistent RPM (hunting
or surging)
Excessive vibration
Loss of power
Unit fails to propel itself

TROUBLESHOOTING

Disconnect the spark plug wire and ground it against the engine to prevent
unintended starting. Before performing any type of maintenance/service,
disengage all controls and stop the engine. Wait until all moving parts
have come to a complete stop. Always wear safety glasses during operation
or while performing any adjustments or repairs.
Cause
1. Choke control not in CHOKE position.
2. Spark plug wire disconnected.
3. Faulty spark plug.
4. Fuel tank empty or stale fuel.
5. Engine not primed.
6. Key not inserted.
7. Extension cord not connected (when
using electric start button, on models so
equipped).
1. Engine running on CHOKE.
2. Stale fuel.
3. Water or dirt in fuel system.
4. Carburetor out of adjustment.
5. Over-governed engine.
1. Loose parts or damaged auger.
1. Spark plug wire loose.
2. Gas cap vent hole plugged.
1. Drive cable in need of adjustment.
2. Drive belt loose or damaged.
3. Worn friction wheel.
WARNING
1. Move choke control to CHOKE position.
2. Connect wire to spark plug.
3. Clean, adjust gap, or replace.
4. Fill tank with clean, fresh gasoline.
5. Prime engine as instructed in the Operation Section.
6. Insert key fully into the switch.
7. Connect one end of the extension cord to the
electric starter outlet and the other end to a three-
prong 120-volt, grounded, AC outlet.
1. Move choke control to RUN position.
2. Fill tank with clean, fresh gasoline.
3. Drain fuel tank by running engine until it stops. Refill
with fresh fuel.
4. Contact your Sears Parts & Repair Center.
5. Contact your Sears Parts & Repair Center.
1. Stop engine immediately and disconnect spark
plug wire. Tighten all bolts and nuts. If vibration
continues, have unit serviced by a Sears Parts &
Repair Center.
1. Connect and tighten spark plug wire.
2. Remove ice and snow from gas cap. Be certain vent
hole is clear.
1. Adjust drive control cable. Refer to Service and
Maintenance section.
2. Have drive belt replaced. Contact your Sears Parts &
Repair Center.
3. Have friction wheel replaced at a Sears Parts &
Repair Center.
26
Remedy