Harbor Freight Tools 68120 Air Filter Element Maintenance, Cleaning, Spark Plug Maintenance Cap

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SAFETY

SETUP

OPERATION

MAINTENANCE

Air Filter Element Maintenance

1.Remove the air filter cover and the air filter elements and check for dirt. Clean or replace as described below.

2.Cleaning:

•For “paper” filter elements:

To prevent injury from dust and debris, wear ANSI-approved safety goggles, NIOSH‑approved dust mask/respirator, and heavy-duty work gloves. In a well-ventilated area away from bystanders, use pressurized air to blow dust out of the air filter. If this does not get the filter clean, replace it.

•For foam filter elements:

Wash the element in warm water and mild detergent several times. Rinse. Squeeze out excess water and allow it to dry completely. Soak the filter in lightweight oil briefly, then squeeze out the excess oil.

3.Install the new filter or the cleaned filter. Secure the Air Cleaner Cover before use.

Spark Plug Maintenance

Spark

Plug

Cap

1.Disconnect spark plug cap from end of plug. Clean out debris from around spark plug.

2.Using a spark plug wrench, remove the spark plug.

3.Inspect the spark plug:

If the electrode is oily, clean it using a clean, dry rag. If the electrode has deposits on it, polish it using emery paper. If the white insulator is cracked or chipped, the spark plug needs to be replaced.

Recommended Spark Plugs

Brand

 

 

 

68120, 68121

68136

68306

 

NGK®

BP-6ES

 

 

NHSP® / TORCH®

F6TC

F6TC

F6TC

NOTICE: Using an incorrect spark plug may damage the engine.

4.When installing a new spark plug, adjust the plug’s gap to the specification on the Technical Specifications chart. Do not pry against the electrode, the spark plug can be damaged.

5.Install the new spark plug or the cleaned spark plug into the engine. Gasket-style: Finger-tighten until the gasket contacts the cylinder head, then tighten about 1/2-2/3 turn more.

Non-gasket-style: Finger-tighten until the plug contacts the head, then tighten about 1/16 turn more.

NOTICE: Tighten the spark plug properly.

If loose, the spark plug will cause the engine to overheat. If overtightened, the threads in the engine block will be damaged.

6.Apply dielectric spark plug boot protector (not included) to the end of the spark plug and reattach the wire securely.

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

Horizontal Engines

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Contents Email our technical support at predator@harborfreight.com Save this ManualTable of Contents Symbol Definitions RPMSet up Precautions Operating PrecautionsCarbon Monoxide Hazard Using an engine indoors can Kill YOU in MinutesRefueling Service PrecautionsDo not Overfill To Prevent Serious Injury Battery Setup InstructionsEngine on a Vehicle Engine Switch Engine ControlsStarter Handle Muffler Dipstick Serial Number LocationPre-Start Checks Checking and Filling Engine OilChecking and Filling Fuel Starting the EngineInjury from Fire Turn the Engine Switch on Manual StartStopping the Engine Break-in PeriodTurn the Engine Switch to Start StartOFF To Prevent Serious Injury from Accidental Starting Cleaning, Maintenance, and Lubrication ScheduleTo Prevent Serious Injury from Equipment Failure Engine Oil Change Air Filter Element Maintenance CleaningSpark Plug Maintenance Cap BrandStorage Do not use gasoline with more than Troubleshooting10% ethanol E15, E20, E85, etc Use Engine will not start Compression Related section Emission Control System Warranty Limited 90 Day WarrantyManufacturer’s Warranty Coverage Please Read the Following Carefully 68120 212cc Parts List Record Product’s Serial Number Here68120 212cc Assembly DiagramCall 088268121 212cc Parts List 68121 212cc Assembly Diagram 68136 346cc Parts List Assembly Diagram 68136 346cc68306 420cc Parts List Assembly 68306 420ccMounting Hole Diagrams Item 68120 / 68121 212ccItem 68136 346cc and Item 68306 420cc For technical questions, please call Horizontal EnginesPower Take-Off Diagrams 16-24UNFMission Oaks Blvd. PO Box 6009 Camarillo, CA 93011 800

68306, 68120 specifications

Harbor Freight Tools is known for offering a wide range of tools and equipment at competitive prices, making it a favored choice for DIY enthusiasts and professionals alike. Among their extensive catalog, the 68120 and 68306 models stand out for their performance and versatility.

The Harbor Freight Tools 68120 is a 1,000-pound capacity engine hoist designed for lifting heavy engines and machinery with ease. One of its main features is its compact design, which allows for great maneuverability in tight spaces. The hoist operates on a hydraulic system, providing smooth lifting capabilities that ensure safety and reliability. The adjustable boom extends from 45 to 70 inches, enabling users to reach a variety of engine positions without hassle.

Additionally, the 68120 boasts a sturdy steel construction that adds to its durability and longevity. It also includes oversized wheels, making it effortless to move around the garage or shop without damaging floors. A safety latch is integrated into the main boom, which secures loads during operation, providing peace of mind to the user. The hoist is designed with efficiency in mind, enabling users to complete tasks more quickly and effectively.

The 68306 model is a pneumatic tire changer, specifically designed for hassle-free tire changing on various vehicles. This tool features an impressive range of compatibility, accommodating tires from 10 to 21 inches in diameter. The robust construction includes heavy-duty steel components, ensuring that it can withstand the rigorous demands of repeated use in a busy workshop or in mobile situations.

One of the standout features of the 68306 is its pneumatic operation, which allows for quick and effortless tire mounting and demounting. The user-friendly design includes an adjustable arm for varying tire widths, ensuring versatility for different vehicle types. Moreover, the incorporated bead breaker makes it easy to separate tires from their wheels without exerting excessive force.

In summary, both the Harbor Freight Tools 68120 and 68306 provide exceptional value for users seeking reliable, efficient, and robust tools to enhance their automotive repairs. With their advanced features and durable designs, they exemplify the high-quality offerings available from Harbor Freight, catering to both casual and professional users. Whether you need to lift heavy engines or change tires quickly, these tools stand ready to deliver performance and convenience.
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