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Harbor Freight Tools 68120 manual

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Table of contents for the manual

  • Page 1

    Visit our website at: http://www .harborfreight.com Email our technical support at: predator@harborfreight.com ITEMS 68120, 68121, 68136, 68306 Read this material before using this product. Failure to do so can result in serious injury . SA VE THIS MANUAL. Copyright © 2010 by Harbor Freight T ools ® . All rights reserved. No portion of this manua[...]

  • Page 2

    Page 2 For technical questions, please call 1-800-520-0882. Horizontal Engines T able of Contents Specifications ............................................. 2 Safety ......................................................... 3 Setup .......................................................... 6 Operation .............................................[...]

  • Page 3

    Page 3 For technical questions, please call 1-800-520-0882. Horizontal Engines W ARNING SYMBOLS AND DEFINITIONS This is the safety alert symbol. It is used to alert you to potential personal injury hazards. Obey all safety messages that follow this symbol to avoid possible injury or death. Indicates a hazardous situation which, if not avoided, will[...]

  • Page 4

    Page 4 For technical questions, please call 1-800-520-0882. Horizontal Engines 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 eq[...]

  • Page 5

    Page 5 For technical questions, please call 1-800-520-0882. Horizontal Engines 20. Parts, especially exhaust system components, get very hot during use. Stay clear of hot parts. 21. Do not cover the engine or equipment during operation. 22. Keep the equipment, engine, and surrounding area clean at all times. 23. Use the equipment, accessories, etc.[...]

  • Page 6

    Page 6 For technical questions, please call 1-800-520-0882. Horizontal Engines Set Up Read the ENTIRE IMPORT ANT SAFETY INFORMA TION section at the beginning of this manual including all text under subheadings therein before set up or use of this product. TO PREVENT SERIOUS INJUR Y : Operate only with proper spark arrestor installed. Operation of t[...]

  • Page 7

    Page 7 For technical questions, please call 1-800-520-0882. Horizontal Engines Engine Controls Starter Handle Oil Drain Plug Air Filter Fuel V alve Choke Fuel Cap Throttle Engine Switch (Electric Start Models) Muffler Dipstick Starter (Electric Start Models) Serial Number Location (Write on front cover of manual.) Engine Switch (Manual Start Models[...]

  • Page 8

    Page 8 For technical questions, please call 1-800-520-0882. Horizontal Engines Operation Read the ENTIRE IMPORT ANT SAFETY INFORMA TION section at the beginning of this manual including all text under subheadings therein before set up or use of this product. Pre-Start Checks Inspect engine and equipment looking for damaged, loose, and missing parts[...]

  • Page 9

    Page 9 For technical questions, please call 1-800-520-0882. Horizontal Engines Checking and Filling Fuel W ARNING! TO PREVENT SERIOUS INJUR Y 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 Fu[...]

  • Page 10

    Page 10 For technical questions, please call 1-800-520-0882. Horizontal Engines Manual Start 1. T o start a cold engine, move the Choke to the CHOKE position. T o restart a warm engine, leave the Choke in the RUN position. 2. Open the Fuel V alve. 3. Slide the Throttle or Speed Control Lever to 1/3 away from the SLOW position (the “turtle”). No[...]

  • Page 11

    Page 1 1 For technical questions, please call 1-800-520-0882. Horizontal Engines 6. Allow the Engine to run for several seconds. Then, if the Choke lever is in the CHOKE position, move the Choke Lever very slowly to its RUN position. Note: Moving the Choke Lever too fast could stall the engine. IMPORT ANT : Allow the engine to run at no load for fi[...]

  • Page 12

    Page 12 For technical questions, please call 1-800-520-0882. Horizontal Engines Electric Start (if equipped) 1. T o start a cold engine, move the Choke to the CHOKE position. T o restart a warm engine, leave the Choke in the RUN position. 2. Open the Fuel V alve. 3. Slide the Throttle or Speed Control Lever to 1/3 away from the SLOW position (the ?[...]

  • Page 13

    Page 13 For technical questions, please call 1-800-520-0882. Horizontal Engines 5. Allow the Engine to run for several seconds. Then, if the Choke lever is in the CHOKE position, move the Choke Lever very slowly to its RUN position. Note: Moving the Choke Lever too fast could stall the engine. IMPORT ANT : Allow the engine to run at no load for fiv[...]

  • Page 14

    Page 14 For technical questions, please call 1-800-520-0882. Horizontal Engines Maintenance W ARNING TO PREVENT SERIOUS INJUR Y FROM ACCIDENT AL ST ARTING: T urn 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 proce[...]

  • Page 15

    Page 15 For technical questions, please call 1-800-520-0882. Horizontal Engines Checking and Filling Fuel W ARNING! TO PREVENT SERIOUS INJUR Y 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 F[...]

  • Page 16

    Page 16 For technical questions, please call 1-800-520-0882. Horizontal Engines 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: T o prevent injury from dust and debris, wear ANSI-approved safety goggl[...]

  • Page 17

    Page 17 For technical questions, please call 1-800-520-0882. Horizontal Engines Storage When the equipment is to remain idle for longer than 20 days, prepare the engine for storage as follows: 1. CLEANING : W ait for engine to cool, then clean engine with dry cloth. NOTICE: Do not clean using water . The water will gradually enter the engine and ca[...]

  • Page 18

    Page 18 For technical questions, please call 1-800-520-0882. Horizontal Engines T roubleshooting Problem Possible Causes Probable Solutions Engine will not start FUEL RELA TED: 1. No fuel in tank or fuel valve closed. 2. Choke not in CHOKE position, cold engine. 3. Gasoline with more than 10% ethanol used. (E15, E20, E85, etc.) 4. Low quality or de[...]

  • Page 19

    Page 19 For technical questions, please call 1-800-520-0882. Horizontal Engines Problem Possible Causes Probable Solutions Engine misfires 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. 1. Check wire connections. 2. Re-gap or replace [...]

  • Page 20

    Page 20 For technical questions, please call 1-800-520-0882. Horizontal Engines W arranties Limited 90 Day W arranty Harbor Freight T ools 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 p[...]

  • Page 21

    Page 21 For technical questions, please call 1-800-520-0882. Horizontal Engines Harbor Freight T ools Emission Control Defects W arranty Coverage Engines are warranted for a period of two (2) years relative to emission control parts defects, subject to the provisions set forth below . If any emission related part on your engine is defective, the pa[...]

  • Page 22

    Page 22 For technical questions, please call 1-800-520-0882. Horizontal Engines Parts Lists and Diagrams 68120 212cc Parts List Part Description Qty . 1 Gasket, Cylinder Head 1 2 Cover Asm., Cylinder Head 1 3 Gasket, Cylinder Head Cover 1 4 T ube, Breather 1 5 Bolt 4 6 Stud 1 7 Stud 1 8 Stud 2 9 Pin 2 10 Bolt, Cylinder Head 4 11 Plug, Spark 1 12 He[...]

  • Page 23

    Page 23 For technical questions, please call 1-800-520-0882. Horizontal Engines 68120 212cc Assembly Diagram 52 45 49 50 50 44 46 43 54 54 41 42 51 52 53 53 39 33 34 35 36 33 37 38 47 48 47 48 51 16 21 22 15 14 17 18 18 17 20 23 23 19 13 32 56 56 56 55 72 72 73 74 11 1 4 2 3 5 6 8 10 10 10 10 8 7 9 9 5 5 12 40 79 78 81 82 83 82 84 85 85 80 92 93 93[...]

  • Page 24

    Page 24 For technical questions, please call 1-800-520-0882. Horizontal Engines 68121 212cc Parts List Part Description Qty . 1 Gasket, Cylinder Head 1 2 Cover Asm., Cylinder Head 1 3 Gasket, Cylinder Head Cover 1 4 T ube, Breather 1 5 Bolt 4 6 Stud 1 7 Stud 1 8 Stud 2 9 Pin 2 10 Bolt, Cylinder Head 4 11 Plug, Spark 1 12 Head Asm., Cylinder 1 13 Cr[...]

  • Page 25

    Page 25 For technical questions, please call 1-800-520-0882. Horizontal Engines 68121 212cc Assembly Diagram 52 45 49 50 50 44 46 43 54 54 41 42 51 52 53 53 39 33 34 35 36 33 37 38 47 48 47 48 51 16 21 22 15 14 17 18 18 17 20 23 23 19 13 32 56 56 56 55 11 1 4 2 3 5 6 8 10 10 10 10 8 7 9 9 5 5 12 40 101 102 102 103 104 105 106 107 10 8 95 97 99 99 5[...]

  • Page 26

    Page 26 For technical questions, please call 1-800-520-0882. Horizontal Engines 68136 346cc Parts List Part Description Qty . 1 Gasket, Cylinder Head 1 2 Cover Asm., Cylinder Head 1 3 Gasket, Cylinder Head Cover 1 4 T ube, Breather 1 5 Bolt Asm., Cylinder Head Cover 1 6 Stud 2 7 Stud 2 8 Pin 2 9 Bolt, Cylinder Head 4 10 Plug, Spark 1 11 Head Asm., [...]

  • Page 27

    Page 27 For technical questions, please call 1-800-520-0882. Horizontal Engines 68136 346cc Assembly Diagram 46 43 42 51 1 7 9 7 6 6 10 9 9 9 8 11 2 5 4 41 64 66 99 10 0 10 1 10 2 10 4 108 105 10 7 10 9 110 111 112 39 8 3 29 32 30 33 31 33 34 34 34 34 34 34 34 35 36 37 38 42 44 45 47 48 50 49 52 53 54 55 55 56 56 57 58 58 59 59 60 60 61 61 62 62 63[...]

  • Page 28

    Page 28 For technical questions, please call 1-800-520-0882. Horizontal Engines 68306 420cc Parts List Part Description Qty . 1 Gasket, Cylinder Head 1 2 Cover Asm., Cylinder Head 1 3 Gasket, Cylinder Head Cover 1 4 T ube, Breather 1 5 Bolt Asm., Cylinder Head Cover 1 6 Stud 2 7 Stud 2 8 Pin 2 9 Bolt, Cylinder Head 4 10 Plug, Spark 1 11 Head Asm., [...]

  • Page 29

    Page 29 For technical questions, please call 1-800-520-0882. Horizontal Engines 68306 420cc Assembly Diagram 46 43 42 51 1 7 9 7 6 6 10 9 9 9 8 11 2 5 4 12 13 16 17 18 21 22 27 24 19 20 28 23 14 26 84 84 41 64 66 99 10 0 10 1 10 2 97 86 85 90 89 92 92 91 88 89 87 93 94 96 97 11 2 109 111 113 114 115 116 39 40 15 25 8 3 19 20 25 25 25 26 29 32 30 33[...]

  • Page 30

    Page 30 For technical questions, please call 1-800-520-0882. Horizontal Engines Mounting Hole Diagrams Note: Not to scale. ITEM 68120 / 68121 212cc 6.38 in. / 162mm 2.6 in. / 66mm 1.6 in. / 40.5mm 2.97 in. / 75.5mm 3.17 in. / 80.5mm ITEM 68136 346cc and ITEM 68306 420cc 7.72 in. / 196mm 4.13 in. / 105mm 4.06 in. / 103mm 3.39 in. / 86mm SAFETY OPERA[...]

  • Page 31

    Page 31 For technical questions, please call 1-800-520-0882. Horizontal Engines Power T ake-Off Diagrams Note: Not to scale. ITEM 68120 / 68121 212cc 2.43 in. / 61.7mm 1.79 in. / 45.5mm 0.67 in. / 17mm 5/16-24UNF Ø0.75 in. / 19.05mm 0.64 in. / 16.36mm 0.1875 in. / 4.78mm 4x5/16-24UNF 5/16-24UNF 4.17 in. / 106mm Ø3.625 in. / 92mm ITEM 68136 346cc [...]

  • Page 32

    3491 Mission Oaks Blvd. • PO Box 6009 • Camarillo, CA 9301 1 • (800) 520-0882 www .harborfreight.com[...]