Owner's Manual

English – 29
TROUBLESHOOTING TABLE
!
WARNING! Always stop unit and disconnect spark plug before performing all of the
recommended remedies below except remedies that require operation of the unit.
TROUBLE CAUSE REMEDY
Engine will not
start or will run only
a few seconds after
starting.
1. ON/STOP switch in STOP position.
2. Engine flooded.
3. Fuel tank empty.
4. Spark plug not firing.
5. Fuel not reaching carburetor.
6. Carburetor requires adjustment.
7. None of the above.
1. Move ON/STOP switch to ON.
2. See “Difficult Starting” in the Operation
Section.
3. Fill tank with correct fuel mixture.
4. Install new spark plug.
5. Check for dirty fuel filter; replace.
Check for kinked or split fuel line; repair or
replace.
6. Contact Sears Service (see back cover).
7. Contact Sears Service (see back cover).
Engine will not idle
properly.
1. Idle speed set too high or too low.
2. Low Speed Mixture requires adjustment.
3. Crankshaft seals worn.
4. Compression low.
5. None of the above.
1. See “Carburetor Adjustment” in the
Service and Adjustments Section.
2. Contact Sears Service (see back cover).
3. Contact Sears Service (see back cover).
4. Contact Sears Service (see back cover).
5. Contact Sears Service (see back cover).
Engine will not
accelerate, lacks
power, or dies
under a load.
1. Air filter dirty.
2. Spark plug fouled.
3. Carburetor requires adjustment.
4. Exhaust ports or muffler outlets plugged.
5. Compression low.
6. Chain brake engaged.
7. None of the above.
1. Clean or replace air filter.
2. Clean or replace plug and regap.
3. Contact Sears Service (see back cover).
4. Contact Sears Service (see back cover).
5. Contact Sears Service (see back cover).
6. Disengage chain brake.
7. Contact Sears Service (see back cover).
Engine smokes
excessively.
1. Choke partially on.
2. Fuel mixture incorrect.
3. Air filter dirty.
4. High Speed Mixture requires adjustment.
5. Crankcase leak.
1. Adjust choke.
2. Empty fuel tank and refill with correct fuel
mixture.
3. Clean or replace air filter.
4. Contact Sears Service (see back cover).
5. Contact Sears Service (see back cover).
Engine runs hot.
1. Fuel mixture incorrect.
2. Spark plug incorrect.
3. High Speed Mixture set too lean.
4. Exhaust ports or muffler outlets plugged.
5. Carbon build-up on spark arresting screen.
6. Starter housing dirty
7. None of the above.
1. Empty fuel tank and refill with correct fuel
mixture.
2. Replace with correct plug.
3. Contact Sears Service (see back cover).
4. Contact Sears Service (see back cover).
5. Clean spark arresting screen.
6. Clean starter housing area.
7. Contact Sears Service (see back cover).
Oil inadequate or
bar and chain
lubrication.
1. Oil tank empty.
2. Oil pump or oil filter clogged.
3. Guide bar oil hole blocked.
1. Fill oil tank.
2. Contact Sears Service (see back cover).
3. Remove bar and clean.
Chain moves at
idle speed.
1. Idle speed requires adjustment.
2. Clutch requires repair.
1. See “Carburetor Adjustment” in the
Maintenance Section.
2. Contact Sears Service (see back cover).