Troubleshooting - Craftsman 247.77012 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 runs erratically
Engine overheats
Engine hesitates at high RPMs
Engine idles poorly
Excessive vibration
Unit does not discharge
Rate of discharge slows
considerably or composition of
discharged material changes

TROUBLESHOOTING

Warning
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. Disconnect spark plug wire and ground it against the
engine to prevent unintended starting. Always wear safety glasses during
operation or while performing any adjustments or repairs.
Cause
1. Throttle lever not in correct starting position
2. Choke not in ON position
3. Spark plug wire disconnected
4. Faulty spark plug
5. Fuel tank empty or stale fuel
6. Cannot pull recoil cord
7. Safety switch not depressed
8. Safety switch wire is not connected to
engine or not properly grounded
1. Unit running on CHOKE
2. Spark plug wire loose
3. Stale fuel
4. Water or dirt in fuel system
5. Dirty air cleaner
6. Low engine RPM
7. Carburetor out of adjustment
1. Engine oil level low
2. Air flow restricted
1. Spark plug gap set too close
1. Fouled spark plug
2. Dirty air cleaner
1. Loose parts or damaged impeller
1. Discharge area clogged
2. Foreign object lodged in impeller
3. Low engine RPM
4. Vacuum bag is full
1. Low engine RPM
2. Chipper blade dull
1. Move throttle lever to START/RUN position.
2. Move CHOKE to ON position.
3. Connect wire to spark plug.
4. Clean, adjust gap, or replace.
5. Fill tank with clean, fresh gasoline.
6. Obstruction lodged in impeller. Disconnect spark
plug wire and remove lodged object.
7. Safety switch must be depressed by the front tab on
the bag handle when securing the bag.
8. Connect safety switch wire to engine connector and
ground to mounting bracket.
1. Move choke lever to OFF position.
2. Connect and tighten spark plug wire.
3. Fill tank with fresh gasoline.
4. Drain fuel. Refill with fresh fuel.
5. Clean or replace air cleaner filter.
6. Always run engine at full throttle.
7. Contact your Sears Parts & Repair Center.
1. Fill engine with proper amount and type of oil.
2. Clean grass clippings and debris from around the
engine's cooling fins and blower housing.
1. Remove spark plug and adjust gap.
1. Replace spark plug and adjust gap.
2. Replace air cleaner cartridge.
1. Stop engine immediately and disconnect spark plug
wire. Contact your Sears Parts & Repair Center.
1. Stop engine immediately and disconnect spark plug
wire. Clean flail screen and inside of discharge open-
ing.
2. Stop engine and disconnect spark plug wire. Remove
lodged object.
3. Always run engine at full throttle.
4. Empty bag.
1. Always run engine at full throttle.
2. Replace chipper blade or contact your Sears Parts &
Repair Center.

remedy