Troubleshooting - Engine - Chicago Electric 66619 Operation And Service Instructions Manual

Problem
Engine will not
start
Follow all safety precautions whenever diagnosing or servicing the
equipment or engine.
SKU 66619 For technical questions, please call 1-800-444-3353.

TRoUblEShooTING - ENGINE

Possible causes
FUEL RELATED:
1. Improper gasoline/2 cycle oil mix.
2. No fuel in tank or fuel valve closed.
3. Choke not in start position, especially
with cold engine.
4. Low quality or deteriorated, old
gasoline.
5. Carburetor not primed.
6. Dirty fuel passageways blocking fuel
flow.
7. Carburetor needle stuck. Fuel can be
smelled in the air.
8. Too much fuel in chamber. This can be
caused by a stuck carburetor needle.
IGNITION (SPARK) RELATED:
1. Spark plug wire not connected
securely.
2. Spark plug electrode wet or dirty.
3. Incorrect spark plug gap.
4. Spark plug wire or spark plug broken.
5. Incorrect spark timing or faulty ignition
system.
COMPRESSION RELATED:
1. Cylinder not lubricated. Problem after
long storage periods.
2. Loose or broken spark plug. (Hissing
noise will occur when trying to start.)
3. Loose cylinder head or damaged head
gasket. (Hissing noise will occur when
trying to start.)
4. Engine valves or tappets misadjusted
or stuck.
Probable Solutions
FUEL RELATED:
1. Mix 50 parts unleaded gasoline with 1
part 2-cycle oil.
2. Fill fuel tank and open fuel valve.
3. Move choke to start position if engine
is cold.
4. Use only fresh 89+ octane unleaded
gasoline and 2-cycle oil mixture.
5. Prime carburetor by pressing priming
bulb specified number of times (if
equipped).
6. Clean out passageways using fuel
additive. Heavy deposits may require
further cleaning.
7. Gently tap side of carburetor float
chamber with screwdriver handle.
8. Turn choke to run position. Remove
spark plug and pull the start handle
several times to air out the chamber.
Reinstall spark plug and set choke to
start position.
IGNITION (SPARK) RELATED:
1. Connect spark plug wire properly.
2. Clean spark plug.
3. Correct spark plug gap.
4. Replace spark plug wire and/or spark
plug.
5. Have qualified technician diagnose/
repair ignition system.
COMPRESSION RELATED:
1. Pour tablespoon of oil into spark plug
hole. Crank engine a few times and try
to start again.
2. Tighten spark plug. If that does not
work, replace spark plug. If problem
persists, may have head gasket
problem, see #3 below.
3. Tighten head. If that does not remedy
problem, replace head gasket.
4. Adjust valve clearance. If that does not
work, clean or replace valves/tappets.
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