Harbor Freight Tools 65761 Problem Possible Causes Probable Solutions Engine misfires, Suddenly

Page 20

Troubleshooting

Problem

 

Possible Causes

 

Probable Solutions

Engine misfires

1. Spark plug wire loose.

1.

Check wire connections.

 

2.

Incorrect spark plug gap or

2.

Re-gap or replace spark plug.

 

 

damaged spark plug.

 

 

 

3.

Defective spark plug wire.

3.

Replace spark plug wire.

 

4.

Old or low quality gasoline.

4.

Use only fresh 89+ octane unleaded

 

 

 

 

gasoline.

 

5.

Incorrect compression.

5.

Diagnose and repair compression.

 

 

 

 

(Use Engine will not start:

 

 

 

 

Compression Related

 

 

 

 

section.)

Engine stops

1.

Low oil shutdown.

1.

Fill engine oil to proper level. Check

suddenly

 

 

 

engine oil before EVERY use.

 

2.

Fuel tank empty or full of impure or

2.

Fill fuel tank with fresh 89+ octane

 

 

low quality gasoline.

 

unleaded gasoline.

 

3.

Defective fuel tank cap creating

3.

Test/replace fuel tank cap.

 

 

vacuum, preventing proper fuel flow.

 

 

 

4.

Improper idle speed.

4.

Properly adjust idle speed.

 

5.

Faulty magneto, incorrect timing, or

5.

Have qualified technician diagnose

 

 

clogged carburetor.

 

and service engine.

Engine knocks

1.

Old or low quality gasoline.

1.

Fill fuel tank with fresh 89+ octane

 

 

 

 

unleaded gasoline.

 

2.

Engine overloaded.

2.

Do not exceed equipment’s load

 

 

 

 

rating.

 

3.

Incorrect spark timing, deposit

3.

Have qualified technician diagnose

 

 

buildup, worn engine, or other

 

and service engine.

 

 

mechanical problems.

 

 

Engine backfires

1.

Impure or low quality gasoline.

1.

Fill fuel tank with fresh 89+ octane

 

 

 

 

unleaded gasoline.

 

2.

Engine too cold.

2.

Use cold weather fuel and oil

 

 

 

 

additives to prevent backfiring.

 

3.

Choke not open after engine warm.

3.

Move choke to run position after

 

 

 

 

engine warms up.

 

4.

Engine not properly adjusted for

4.

Qualified technician must adjust

 

 

high altitude operation.

 

engine at altitudes greater than

 

 

 

 

5,000 feet above sea level.

 

5.

Intake valve stuck, choke stuck,

5.

Have qualified technician diagnose

 

 

incorrect timing, clogged carburetor,

 

and service engine.

 

 

or overheated engine.

 

 

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

SKU 65761

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

Page 20

Image 20
Contents For technical questions or replacement parts, please call Distributed exclusively by Harbor Freight ToolsContents For technical questions, please call Set up precautions Save This ManualOperating precautions Carbon Monoxide Hazard Using an engine indoorsFor technical questions, please call Service precautions Basic Specifications Set Up InstructionsAssembly Access the Tires 48 for the followingConnecting the Rail Assembly to the Oil Tank Place Log Here Operating Instructions Starting the EngineEquipment Operation Important Information Transporting the Log SplitterFor technical questions, please call Servicing Technical SpecificationsMaintenance Procedures Fuel Filter Replacement if equipped Air Filter Element MaintenanceCleaning Cleaning, Maintenance, Lubrication Schedule StorageTransport Maintenance Start TroubleshootingProblem Possible Causes Probable Solutions Engine will not Problem Possible Causes Probable Solutions Engine misfires Engine stopsSuddenly Engine knocksPart Description Qty Record Product’s Serial Number HereAssembly Diagram Cylinder head parts list & diagram Description QtyCrank case parts list & diagram Crank case cover parts list and diagram CRANKSHAFT/PISTON Parts List & Diagram Gas distribution adjustment system parts list Diagram Starter subassembly parts list & diagram Diversion Assembly parts list & diagram Carburetor parts list & diagram Flywheel/coil assembly parts list & diagram Control system parts list & diagram Air cleaner parts list & diagram Muffler parts list & diagram Muffler parts list & diagram Limited 1 year / 90 Day Warranty Emission Control System WarrantyOwner’s Warranty Responsibilities