99cc Horizontal Engine Item 68124 99cc Using an engine indoors CAN KILL YOU IN MINUTES. Engine exhaust contains carbon monoxide. This is a poison you cannot see or smell. NEVER use inside a home or garage, EVEN IF doors and windows are open. Only use OUTSIDE and far away from windows, doors, and vents. When unpacking, make sure that the product is intact and undamaged. If any Engine parts are missing or broken, please call 1-800-520-0882 as soon as possible.
Specifications Description Displacement Dimensions Dry Weight Maximum Torque Maximum RPM Compression Ratio Bore x Stroke Fuel Type Engine Oil Capacity Fuel Tank Capacity Bearing Type Mounting Base Pattern PTO Shaft Diameter PTO Shaft Length PTO Shaft Height PTO Shaft Keyway Shaft End Tapped (Diameter / Thread per inch) Shaft Rotation (From PTO) Spark Plug Page 2 Item 68124 99cc 310L x 290W x 300H mm 12.2L x 11.4W x 11.8H IN. 22 LBS. / 10 KG 3.5 FT-LBS @ 2500 RPM 3600 RPM 8.5:1 56 mm x 40 mm 2.2 IN. x 1.
Save This Manual Symbol Definitions Keep this manual for the safety warnings and precautions, assembly, operating, inspection, maintenance and cleaning procedures. Write the product’s serial number in the back of the manual near the assembly diagram (or month and year of purchase if product has no number). Keep this manual and the receipt in a safe and dry place for future reference.
Set up Precautions 1. Gasoline fuel and fumes are flammable, and potentially explosive. Use proper fuel storage and handling procedures. Do not store fuel or other flammable materials nearby. 2. Have multiple ABC class fire extinguishers nearby. 3. Operation of this equipment may create sparks that can start fires around dry vegetation. A spark arrestor may be required. The operator should contact local fire agencies for laws or regulations relating to fire prevention requirements. 4.
23. Use the equipment, accessories, etc., in accordance with these instructions and in the manner intended for the particular type of equipment, taking into account the working conditions and the work to be performed. Use of the equipment for operations different from those intended could result in a hazardous situation. 4. Wear ANSI-approved safety goggles, heavy-duty work gloves, and dust mask/respirator during service. 24. Do not operate the equipment with known leaks in the engine’s fuel system. 6.
Engine Controls Fuel Cap Engine Switch Serial Number Location (Write on front cover of manual.) Oil Drain Plug Dipstick Muffler Throttle Starter Handle Choke Air Filter Page 6 For Engine technical questions, please call 1-800-520-0882.
Set Up The emission control system for this engine is warranted for standards set by the U.S. Environmental Protection Agency. For warranty information, refer to the last pages of this manual. Read the ENTIRE IMPORTANT SAFETY INFORMATION section at the beginning of this manual including all text under subheadings therein before set up or use of this product. TO PREVENT SERIOUS INJURY: Operate only with proper spark arrestor installed.
Checking and Filling Fuel Operation Read the ENTIRE IMPORTANT SAFETY INFORMATION section at the beginning of this manual including all text under subheadings therein before set up or use of this product. Pre-Start Checks WARNING! TO PREVENT SERIOUS INJURY FROM FIRE: Fill the fuel tank in a well-ventilated area away from ignition sources. If the engine is hot from use, shut the engine off and wait for it to cool before adding fuel. Do not smoke. 1. Clean the Fuel Cap and the area around it. 2.
1. To start a cold engine, move the Choke to the CHOKE position. To restart a warm engine, leave the Choke in the RUN position. 2. Slide the Throttle or Speed Control Lever to 1/3 away from the SLOW position (the “turtle”). Note: Some tools have a Speed Control Lever located elsewhere on the tool which functions the same as the Throttle. Use the Speed Control Lever in place of the Throttle when the tool is so equipped. 3. Turn the Engine Switch on. 1 2 3 ON 4.
7. Break-in Period: a. Breaking-in the engine will help to ensure proper equipment and engine operation. b. The operational break-in period will last about 3 hours of use. During this period: • Do not apply a heavy load to the equipment. • Do not operate the engine at its maximum speed. c. The maintenance break-in period will last about 20 hours of use. After this period: • Change the engine oil.
Service WARNING TO PREVENT SERIOUS INJURY FROM ACCIDENTAL STARTING: Turn the Power Switch of the equipment to its “OFF” position, wait for the engine to cool, and disconnect the spark plug cap before performing any inspection, maintenance, or cleaning procedures. TO PREVENT SERIOUS INJURY FROM EQUIPMENT FAILURE: Do not use damaged equipment. If abnormal noise, vibration, or excess smoking occurs, have the problem corrected before further use. Follow all service instructions in this manual.
Checking and Filling Fuel WARNING! TO PREVENT SERIOUS INJURY FROM FIRE: Fill the fuel tank in a well-ventilated area away from ignition sources. If the engine is hot from use, shut the engine off and wait for it to cool before adding fuel. Do not smoke. 1. Clean the Fuel Cap and the area around it. 2. Unscrew and remove the Fuel Cap. If needed, fill the Fuel Tank up to the top of the Fuel Level marker on the fuel strainer with 87 octane or higher unleaded gasoline. Full level Full level 7.
Spark Plug Maintenance The spark plug is located below the muffler. 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.
Troubleshooting Problem Possible Causes Probable Solutions Engine will not start FUEL RELATED: 1. No fuel in tank or Throttle at SLOW setting. 2. Choke not in CHOKE position, cold engine. 3. Gasoline with more than 10% ethanol used. (E15, E20, E85, etc.) 9. Clogged Fuel Filter. FUEL RELATED: 1. Fill fuel tank and move throttle to faster setting. 2. Move Choke to CHOKE position. 3. Clean out ethanol rich gasoline from fuel system. Replace components damaged by ethanol.
Problem Engine misfires Possible Causes 1. Spark plug cap loose. 2. Incorrect spark plug gap or damaged spark plug. 3. Defective spark plug cap. 4. Old or low quality gasoline. 5. Incorrect compression. Engine stops suddenly 1. Low oil shutdown. 2. Fuel tank empty or full of impure or low quality gasoline. 3. Defective fuel tank cap creating vacuum, preventing proper fuel flow. 4. Faulty magneto. 5. Disconnected or improperly connected spark plug cap. Probable Solutions 1. Check wire connections. 2.
Emission Control System Warranty Warranties Limited 90 Day Warranty Harbor Freight Tools Co. makes every effort to assure that its products meet high quality and durability standards, and warrants to the original purchaser that this product is free from defects in materials and workmanship for the period of 90 days from the date of purchase.
Harbor Freight Tools Emission Control Defects Warranty Coverage 4. Warranty claims shall be filed in accordance with the provisions of the HFT warranty policy explained in the box at the top of the previous page. HFT shall not be liable for any loss of use of the engine, for any alternative usage, for any damage to goods, loss of time, or inconvenience.
Parts List and Diagram Part 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 Description Head Asm., Cylinder Gasket, Cylinder Head Cover Asm., Cylinder Head Gasket, Cylinder Head Cover Tube, Breather Bolt Stud Stud Pin Bolt, Cylinder Head Plug, Spark Block, High Tension Line Seal, Oil Bolt, Drain Plug Washer Crankcase Asm. Bearing Gear Asm.
SKU 68124 6 67 REV 11h 6 6 67 6 12 3 4 66 28 28 10 10 28 5 10 10 65 28 22 11 23 28 28 8 1 8 7 35 36 30 For Engine technical questions, please call 1-800-520-0882.
Mounting Hole Diagram 1 in. / 25.5mm Not to scale. 2.42 in. / 61.5mm Note: 1.44 in. / 36.5mm 4.02 in. / 102mm Power Take-Off Diagram Not to scale. 2x5/16-24UNF 2.37 in. / 60.1mm Ø3.625 in. / 92.1mm 0.1875 in. / 4.76mm 1.79 in. / 45.5mm Ø0.625 in. / 16mm 0.51 in. / 13mm Note: 5/16-24UNF ≥0.98 in. / 25mm 3.58 in. / 91mm* 4x5/16-24UNF *Measurement without base. PTO shaft height including base is 4.04 in. / 102.5mm 3491 Mission Oaks Blvd.
