Engine Troubleshooting

Problem

 

Possible Causes

 

Probable Solutions

Engine will not start

Fuel Related:

Fuel Related:

 

1.

No fuel in tank or fuel valve closed.

1.

Fill fuel tank and open fuel valve.

 

2.

Choke not in CHOKE position, cold engine.

2.

Move Choke to CHOKE position.

 

3.

Gasoline with more than 10% ethanol

3.

Clean out ethanol rich gasoline from fuel

 

 

used. (E15, E20, E85, etc.)

 

system. Replace components damaged

 

 

 

 

by ethanol. Use fresh 87+ octane

 

 

 

 

unleaded gasoline only.

 

 

 

 

Do not use gasoline with more than

 

 

 

 

10% ethanol (E15, E20, E85, etc.).

 

4.

Low quality or deteriorated, old gasoline.

4.

Use fresh 87+ octane unleaded gasoline.

 

 

 

 

Do not use gasoline with more than

 

 

 

 

10% ethanol (E15, E20, E85, etc.).

 

5.

Carburetor not primed.

5.

Pull on Starter Handle to prime.

 

6.

Dirty fuel passageways.

6.

Clean out passageways using fuel additive.

 

 

 

 

Heavy deposits may require further cleaning.

 

7.

Carburetor needle stuck. Fuel

7.

Gently tap side of carburetor float

 

 

can be smelled in the air.

 

chamber with screwdriver handle.

 

8.

Too much fuel in chamber. This can be

8.

Turn Choke to RUN position. Remove spark

 

 

caused by the carburetor needle sticking.

 

plug and pull the start handle several times

 

 

 

 

to air out the chamber. Reinstall spark

 

 

 

 

plug and set Choke to CHOKE position.

 

9.

Clogged Fuel Filter.

9.

Replace Fuel Filter.

 

Ignition (spark) Related:

Ignition (spark) Related:

 

1.

Spark plug cap not connected securely.

1.

Connect spark plug cap properly.

 

2.

Spark plug electrode wet or dirty.

2.

Clean spark plug.

 

3.

Incorrect spark plug gap.

3.

Correct spark plug gap.

 

4.

Spark plug cap broken.

4.

Replace spark plug cap.

 

5.

Incorrect spark timing or

5.

Have qualified technician diagnose/

 

 

faulty ignition system.

 

repair ignition system.

 

Compression Related:

Compression Related:

 

1.

Cylinder not lubricated. Problem after long

1.

Pour tablespoon of oil into spark

 

 

storage periods.

 

plug hole. Crank engine a few

 

 

 

 

times and try to start again.

 

2.

Loose or broken spark plug. (Hissing

2.

Tighten spark plug. If that does not work,

 

 

noise will occur when trying to start.)

 

replace spark plug. If problem persists,

 

 

 

 

may have head gasket problem, see #3.

 

3.

Loose cylinder head or damaged

3.

Tighten head. If that does not remedy

 

 

head gasket. (Hissing noise will

 

problem, replace head gasket.

 

 

occur when trying to start.)

 

 

 

4.

Engine valves or tappets

4.

Have qualified technician diagnose/

 

 

mis‑adjusted or stuck.

 

repair ignition system.

Follow all safety precautions whenever diagnosing or servicing the equipment or engine.

Page 16

For Pump technical questions, please call 1-800-444-3353.

Item 68328

 

For Engine technical questions, please call 1-800-520-0882.

 

Page 18
Image 18
Harbor Freight Tools 68328 manual Engine Troubleshooting, Problem Possible Causes Probable Solutions

68328 specifications

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