Harbor Freight Tools 62779 User Manual - Page 58

Problem, Possible Causes, Probable Solutions

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Safety Setup Troubleshooting Problem Possible Causes Probable Solutions Engine will not start FUEL RELATED: 1. No fuel in tank or fuel valve closed. FUEL RELATED: 1. Fill fuel tank with fresh 87+ octane stabilizertreated unleaded gasoline and open fuel valve. Do not use gasoline with more than 10% ethanol (E15, E20, E85, etc.). 2. Choke not in START position, cold engine. 2. Move Choke to START position. 3. Gasoline with more than 10% ethanol used. (E15, E20, E85, etc.) 4. Low quality or deteriorated, old gasoline. 5. Carburetor not primed. 3. Clean out ethanol rich gasoline from fuel system. Replace components damaged by ethanol. Use fresh 87+ octane stabilizertreated unleaded gasoline only. Do not use gasoline with more than 10% ethanol (E15, E20, E85, etc.). 4. Use fresh 87+ octane stabilizer-treated unleaded gasoline. Do not use gasoline with more than 10% ethanol (E15, E20, E85, etc.). 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 can be smelled in the air. 7. Gently tap side of carburetor float chamber with screwdriver handle. 8. Too much fuel in chamber. This can be caused by the carburetor needle sticking. 9. Clogged Fuel Filter. 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. 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. 4. Spark plug cap broken. 3. Correct spark plug gap. 4. Replace spark plug cap. 5. Incorrect spark timing or faulty ignition system. 5. Have qualified technician diagnose/ repair ignition system. COMPRESSION RELATED: COMPRESSION RELATED: 1. Cylinder not lubricated. Problem after long storage periods. 1. Pour tablespoon of oil into spark plug hole. Crank engine a few times and try to start again. 2. Loose or broken spark plug. (Hissing noise will occur when trying to start.) 2. Tighten spark plug. If that does not work, replace spark plug. If problem persists, may have head gasket problem, see #3. 3. Loose cylinder head or damaged head gasket. (Hissing noise will occur when trying to start.) 3. Tighten head. If that does not remedy problem, replace head gasket. 4. Engine valves or tappets mis‑adjusted or stuck. 4. Have qualified technician adjust/ repair valves and tappets. ENGINE OIL RELATED: ENGINE OIL RELATED: 1. Low engine oil. 1. Fill engine oil to proper level. Check engine oil before EVERY use. 2. Engine mounted on slope, triggering low oil shutdown. 2. Operate engine on level surface. Check engine oil level. Follow all safety precautions whenever diagnosing or servicing the equipment or engine. Operation Maintenance Page 18 For technical questions, please call 1-888-866-5797. Engine for ITEM 62779

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Page 18
For technical questions, please call 1-888-866-5797.
Engine for ITEM 62779
SAFETY
SETUP
OPERATION
MAINTENANCE
Troubleshooting
Problem
Possible Causes
Probable Solutions
Engine will not start
FUEL RELATED:
1. No fuel in tank or fuel valve closed.
2. Choke not in START position, cold engine.
3. Gasoline with more than 10% ethanol used.
(E15, E20, E85, etc.)
4. Low quality or deteriorated, old gasoline.
5. Carburetor not primed.
6. Dirty fuel passageways.
7. Carburetor needle stuck.
Fuel can be smelled in the air.
8. Too much fuel in chamber. This can be caused
by the carburetor needle sticking.
9. Clogged Fuel Filter.
FUEL RELATED:
1. Fill fuel tank with fresh 87+ octane stabilizer-
treated unleaded gasoline and open fuel
valve.
Do not use gasoline with more than
10% ethanol (E15, E20, E85, etc.).
2. Move Choke to START position.
3. Clean out ethanol rich gasoline from fuel
system.
Replace components damaged by
ethanol.
Use fresh 87+ octane stabilizer-
treated unleaded gasoline only.
Do not use gasoline with more than
10% ethanol (E15, E20, E85, etc.).
4. Use fresh 87+ octane stabilizer-treated
unleaded gasoline.
Do not use gasoline with more than
10% ethanol (E15, E20, E85, etc.).
5. Pull on Starter Handle to prime.
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.
9. Replace Fuel Filter.
IGNITION (SPARK) RELATED:
1. Spark plug cap not connected securely.
2. Spark plug electrode wet or dirty.
3. Incorrect spark plug gap.
4. Spark plug cap broken.
5. Incorrect spark timing or faulty ignition system.
IGNITION (SPARK) RELATED:
1. Connect spark plug cap properly.
2. Clean spark plug.
3. Correct spark plug gap.
4. Replace spark plug cap.
5. Have qualified technician diagnose/
repair 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 mis-adjusted or stuck.
ENGINE OIL RELATED:
1. Low engine oil.
2. Engine mounted on slope,
triggering low oil shutdown.
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.
3. Tighten head.
If that does not remedy problem,
replace head gasket.
4. Have qualified technician adjust/
repair valves and tappets.
ENGINE OIL RELATED:
1. Fill engine oil to proper level.
Check engine oil before EVERY use.
2. Operate engine on level surface.
Check engine oil level.
Follow all safety precautions whenever diagnosing or servicing the equipment or engine.