Harbor Freight Tools 69381 Owners Manual - Page 15

Safety Setup 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/oil mixture. Engine stops suddenly 5. Incorrect compression. 1. Fuel tank empty or full of impure or low quality gasoline/oil mixture. Engine stops when under heavy load 2. Defective fuel tank cap creating vacuum, preventing proper fuel flow. 3. Faulty magneto. 4. Disconnected or improperly connected spark plug cap. 1. Dirty air filter 2. Engine running cold. Engine knocks 1. Old or low quality gasoline/oil mixture. Engine backfires 2. Engine overloaded. 3. Incorrect spark timing, deposit buildup, worn engine, or other mechanical problems. 1. Impure or low quality gasoline/oil mixture. 2. Engine too cold. 3. Intake valve stuck or overheated engine. 4. Incorrect timing. Attached device 1. Device not plugged in properly. doesn't have power 2. Circuit Breaker tripped. Attached device begins to operate abnormally 3. Product needs service. 1. Problem with device. 2. Rated load capacity exceeded. Probable Solutions 1. Check wire connections. 2. Re-gap or replace spark plug. 3. Replace spark plug cap. 4. Use only fresh 87+ octane stabilizer-treated unleaded gasoline/oil mixture. Do not use gasoline with more than 10% ethanol (E15, E20, E85, etc.). 5. Diagnose and repair compression. (Use Engine will not start: COMPRESSION RELATED section.) 1. Fill fuel tank with fresh 87+ octane stabilizer-treated unleaded gasoline/oil mixture. Do not use gasoline with more than 10% ethanol (E15, E20, E85, etc.). 2. Test/replace fuel tank cap. 3. Have qualified technician service magneto. 4. Secure spark plug cap. 1. Clean element. 2. Allow engine to warm up prior to operating equipment. 1. Fill fuel tank with fresh 87+ octane stabilizer-treated unleaded gasoline/oil mixture. Do not use gasoline with more than 10% ethanol (E15, E20, E85, etc.). 2. Do not exceed equipment's load rating. 3. Have qualified technician diagnose and service engine. 1. Fill fuel tank with fresh 87+ octane stabilizer-treated unleaded gasoline/oil mixture. Do not use gasoline with more than 10% ethanol (E15, E20, E85, etc.). 2. Use cold weather fuel additives to prevent backfiring. 3. Have qualified technician diagnose and service engine. 4. Check engine timing. 1. Turn off and unplug the device, then plug it back in again and turn on. 2. Turn off and unplug device, reset Circuit Breaker, plug in device and turn on. 3. Have product repaired. 1. Immediately unplug device. Have device repaired by a qualified technician, or replace device. 2. Lower the number of items plugged into the generator to stay within the rated capacity, or use a more powerful generator. Follow all safety precautions whenever diagnosing or servicing the generator or engine. Operation Maintenance ITEM 69381 For technical questions, please call 1-888-866-5797. Page 15