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NOTE: For repairs beyond the minor adjustments listed above, please contact your local Sears Service Center.
Problem Possible Cause(s) Corrective Action
Engine fails to start 1. Fuel tank empty or stale fuel.
2. Spark plug wire disconnected.
3. Cannot pull recoil cord.
4. Choke not in ON position.
5. Blocked fuel line.
6. Engine not primed properly.
7. Faulty spark plug.
8. Safety switch not depressed.
9. Safety switch wire is not
connected to engine or not
properly grounded.
1. Fill tank with clean, fresh gasoline. Fuel will not
last over thirty days unless a fuel stabilizer is
added.
2. Connect wire to spark plug.
3. Obstruction lodged in impeller. Disconnect
spark plug wire and remove lodged object.
4. Move CHOKE to ON position.
5. Clean fuel line.
6. Prime engine.
7. Clean, adjust gap, or replace.
8. Safety switch must be depressed by the front
tab on the bag handle when securing the bag.
9. Connect safety switch wire to engine connector
and ground to mounting bracket.
Loss of power;
operation erratic
1. Spark plug wire loose.
2. Unit running on CHOKE.
3. Blocked fuel line or stale fuel.
4. Water or dirt in fuel system.
5. Carburetor out of adjustment.
6. Low engine RPM.
1. Connect and tighten spark plug wire.
2. Move choke lever to OFF position.
3. Clean fuel line; fill tank with clean fresh
gasoline. Fuel will not last over thirty days
unless a fuel stabilizer is used.
4. Disconnect fuel line at carburetor to drain fuel
tank. Refill with fresh fuel.
5. Contact your Sears Service Center.
6. Always run engine at full throttle.
Too much vibration 1. Loose parts or damaged
impeller.
1. Stop engine immediately and disconnect spark
plug wire. Have unit serviced by a Sears
Service Center.
Engine overheats 1. Carburetor not adjusted
2. Engine oil level low
3. Dirty air cleaner.
1. Contact your Sears Service Center.
2. Fill crankcase with proper selection of oil.
3. Clean or replace air cleaner.
Occasional skip
(hesitates) at high
speed.
1. Spark plug gap too close. 1. Adjust gap to.030”.
Unit does not
discharge
1. Discharge chute clogged.
2. Foreign object lodged in
impeller.
3. Low engine RPM.
4. Vacuum bag is full.
1. Stop engine immediately and disconnect spark
plug wire. Clean flail screen and inside of
discharge opening. See Maintenance section of
this manual.
2. Stop engine immediately and disconnect spark
plug wire. Remove lodged object.
3. Always run engine at full throttle.
4. Empty bag.
Rate of discharge
slows considerably or
composition of
discharged material
changes
1. Low engine RPM.
2. Chipper blade dull.
1. Always run engine at full throttle.
2. Replace chipper blade or see your Sears
Service Center.
TROUBLESHOOTING