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ITEM # GEN4000IOF Portable Gas Fuel Inverter Generator  

 

 

 

20 

Air Filter Maintenance  

 
Routine maintenance of the air filter helps maintain proper airflow to the carburetor. Occasionally verify that the air filter is free of excessive dirt. The 
air filter will require more frequent cleaning when operating this generator in extremely dusty areas. 

 

To clean the air filter, remove the foam filter element from the generator and wash it in warm water and household dish detergent. Thoroughly rinse 
and dry.  Pour a small amount of motor oil onto the filter, ring out ALL excess oil, and reinstall the foam filter element in the generator. 

 

 
Unscrew the bolts, or unsnap the clips at the top and bottom of the air filter cover, located below the choke lever, to access the foam filter element.

 

 

Spark Plug Maintenance 

 
The spark plug is essential for proper engine operation. The spark plug should be intact, free of deposits, and properly gapped. A bad or incorrectly 

installed spark plug can cause engine damage. To inspect the spark plug: 
1. Remove the spark plug by pulling on the spark plug cap. 

2. Unscrew the spark plug from this generator by using the included spark plug wrench. 

3. Visually inspect the spark plug. If it is cracked and/or chipped, discard and install a new spark plug. A F7RTC Torch spark plug, such as   
NGK 

BPR7ES is recommended

4. Measure the spark plug electrode gap with a gauge. The gap should be 0.020-0.028in (0.5-0.7mm). (See Figure 9.) 

5. If re-using the spark plug, use a wire brush to clean any dirt from around the spark plug base and then re-gap the spark plug. 

6. Screw the spark plug back into place on this generator by using the included spark plug wrench. 

7. Replace the spark plug cap.  

 

 
 
 
 
 

 
 
 
 
 

                                                          Figure 9  

                                                         Measuring the spark plug gap 

 

To store this generator for extended time, drain the gasoline from the carburetor AND fuel tank. 

To drain gasoline from this generator: 
1. Turn the fuel valve to the “off” position and let the engine run until it stops. 

2. Remove the fuel filter cup.  

3. Empty the fuel filter cup of any fuel. 

4. Place a receptacle underneath this generator to catch gasoline as it drains. 

5. Turn the fuel valve to the “on” position and allow all gasoline to drain. 

6. Turn the fuel valve to the “off” position. 

7. Replace the fuel filter cup. 

8. Store the drained gasoline in a suitable place. 
To store this generator for extended time, the fuel needs to be drained from the carburetor. To drain the gasoline from the carburetor turn the fuel 
valve to the “off” position while the engine is running. The generator will shut down when all the gasoline in the carburetor has been used. 

 
 

Summary of Contents for GEN4000IOF

Page 1: ...ccur We reserve the right to change this product at any time without prior notice IF THERE IS ANY QUESTION ABOUT A CONDITION BEING SAFE OR UNSAFE DO NOT OPERATE THIS PRODUCT If you experience a proble...

Page 2: ...22 ounces Fuel Capacity 4 5 gallon Fuel Type Unleaded Gasoline Only 87 rating or higher 3 800 RPM Mobility Kit Not Available If you are using a generator 3 000 feet above sea level it may not functio...

Page 3: ...erify Oil Level 13 Step 2 Verify Gas Level 13 Step 3 Ground The Generator 13 STARTING THE GENERATOR 14 USING THE GENERATOR 15 AC Usage 15 Overload Indicator 16 Economy Control Switch 16 AC Parallel 17...

Page 4: ...ian to come to the owner to make the warranty repair or pay for the repair to be made at a local non authorized service center The provisions of this paragraph apply only for the contiguous states exc...

Page 5: ...Monoxide Gas When in operation the exhaust from this generator contains poisonous carbon monoxide gas Carbon monoxide gas is both odorless and colorless AND may be present even if you do not see or s...

Page 6: ...grees Fahrenheit 65 Degrees Celsius Do not touch hot surfaces Observe all warning placards on this generator denoting hot surfaces Allow this generator to cool for several minutes after use before tou...

Page 7: ...ITEM GEN4000IOF Portable Gas Fuel Inverter Generator 7...

Page 8: ...ITEM GEN4000IOF Portable Gas Fuel Inverter Generator 8 In addition to the previously described safety information familiarize yourself with all safety and hazard placards on this generator...

Page 9: ...enerator 9 PACKAGE CONTENTS The following item is supplied with this Generator Verify that it is included STOP If there are missing items call 1 866 460 9436 Monday Friday 8 AM 4 PM Central Time for c...

Page 10: ...ITEM GEN4000IOF Portable Gas Fuel Inverter Generator 10 GENERATOR COMPONENTS Observe the locations and functions of the various components and controls of this generator...

Page 11: ...IF THE GENERATOR WILL NOT START DOUBLE CHECK THAT THE OIL LEVEL IS COMPLETELY FULL AND ALMOST OVERFLOWING This generator requires engine oil to function Engine oil is a major factor affecting engine p...

Page 12: ...TE Because gasoline can expand do not fill the fuel tank to the very top 4 Securely tighten the fuel tank cap and immediately wipe up any spilled gasoline with a dry cloth Fuel Tank Capacity gallons 4...

Page 13: ...an octane rating of 87 or higher according to Step 2 Add Gasoline of the Using this Generator for the First Time section of this manual Fuel Tank Capacity gallons 4 5 Fuel Type Fresh Unleaded Gasoline...

Page 14: ...s felt Then pull briskly to start the engine Gently return the cord into the generator to avoid damage to the starter or housing Never allow the cord to snap back 7 If the engine fails to start repeat...

Page 15: ...the rated wattage for the generator This generator can run at its surge wattage capacity for only a short time Connect electrical devices requiring a rated running wattage equal to or less than the ra...

Page 16: ...1200 NR 500 300 200 125 7 5 900 1800 NR 350 200 125 100 10 1200 2400 NR 250 150 100 50 15 1800 3600 NR 150 100 65 NR 20 2400 4800 175 125 75 50 NR 25 3000 6000 150 100 60 NR NR 30 3600 7200 125 65 NR...

Page 17: ...black wire on left A and white wire on right B duplicate the same position on the opposite generator 3 Attach both ground connections on both control panels 4 Power up each generator with the Economy...

Page 18: ...dule in Figure 7 Never perform maintenance procedures while this generator is running Allow this generator to cool before commencing any maintenance procedures Keep heat sparks and flame away Improper...

Page 19: ...he oil should be changed after the first 20 hours of operation Subsequently the oil should be changed every 6 months or for every 100 hours of use or when the oil has become contaminated with water an...

Page 20: ...park plug If it is cracked and or chipped discard and install a new spark plug A F7RTC Torch spark plug such as NGK BPR7ES is recommended 4 Measure the spark plug electrode gap with a gauge The gap sh...

Page 21: ...Care section Turn the fuel valve to the off position Disconnect the spark plug Do not obstruct any ventilation openings Do not drop or strike this generator while moving it Store this generator in a c...

Page 22: ...off Pull the fuel line off The carburetor will slide off Turn the carburetor upside down and remove the 10mm bolt on the bottom of the bowl Remove the pin that holds the float on Pull the float up Ins...

Page 23: ...ITEM GEN4000IOF Portable Gas Fuel Inverter Generator 23...

Page 24: ...ITEM GEN4000IOF Portable Gas Fuel Inverter Generator 24 WIRING DIAGRAM...

Page 25: ...ITEM GEN4000IOF Portable Gas Fuel Inverter Generator 25 PARTS DIAGRAM CRANKCASE ASSEMBLY...

Page 26: ...ITEM GEN4000IOF Portable Gas Fuel Inverter Generator 26 CYLINDER HEAD...

Page 27: ...ITEM GEN4000IOF Portable Gas Fuel Inverter Generator 27 CRANKSHAFT PISTON...

Page 28: ...ITEM GEN4000IOF Portable Gas Fuel Inverter Generator 28 CAMSHAFT...

Page 29: ...ITEM GEN4000IOF Portable Gas Fuel Inverter Generator 29 AIR CLEANER...

Page 30: ...ITEM GEN4000IOF Portable Gas Fuel Inverter Generator 30 CARBURETOR...

Page 31: ...ITEM GEN4000IOF Portable Gas Fuel Inverter Generator 31 RECOIL STARTER...

Page 32: ...ITEM GEN4000IOF Portable Gas Fuel Inverter Generator 32 MUFFLER...

Page 33: ...ITEM GEN4000IOF Portable Gas Fuel Inverter Generator 33 GENERATOR...

Page 34: ...ITEM GEN4000IOF Portable Gas Fuel Inverter Generator 34 FUEL TANK...

Page 35: ...ITEM GEN4000IOF Portable Gas Fuel Inverter Generator 35 FRAME...

Page 36: ...ITEM GEN4000IOF Portable Gas Fuel Inverter Generator 36 INVERTER...

Page 37: ...ITEM GEN4000IOF Portable Gas Fuel Inverter Generator 37 CONTROL PANEL...

Page 38: ...ITEM GEN4000IOF Portable Gas Fuel Inverter Generator 38 ELECTRICAL SYSTEM...

Page 39: ...ur failure to ensure the performance of all scheduled maintenance As the power equipment engine owner you should however be aware that Buffalo Corp may deny your warranty coverage if your power equipm...

Page 40: ...e used in the performance of any warranty maintenance or repairs and must be provided without charge to the owner Such use will not reduce the warranty obligations of Buffalo Corp 10 Add on or modifie...

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