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To register your product warranty, please visit buffalotools.com or scan the QR code. 
 

ITEM # GEN4K 

 

4000 Surge Watts / 3000 Running Watts 

 

PORTABLE GASOLINE GENERATOR INSTRUCTION MANUAL 

 
 
 
 
 

 
 
 
 
 

 
 
 
 
 

 

 

READ ALL INSTRUCTIONS AND WARNINGS BEFORE USING THIS PRODUCT. 

This manual provides important information on proper operation & maintenance. Every effort has been  

made to ensure the accuracy of this manual. These instructions are not meant to cover every possible 

condition and situation that may occur. 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!  

Questions? Problems? Call Customer Service!

 

If you experience a problem, have questions or need parts for this product, call Customer Service at   

1-866-460-9436, Monday-Friday, 8 AM - 4 PM Central Time

. A copy of the sales receipt is required. 

 

FOR CONSUMER USE ONLY – NOT FOR PROFESSIONAL USE. 
 
KEEP THIS MANUAL, SALES RECEIPT & APPLICABLE WARRANTY FOR FUTURE  
REFERENCE. 

 

 

Summary of Contents for Sportsman GEN4K

Page 1: ... are not meant to cover every possible condition and situation that may occur 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 Questions Problems Call Customer Service If you experience a problem have questions or need parts for this product call Customer Service at 1 866 460 943...

Page 2: ...ately If you are using a generator 3 000 feet above sea level it may not function properly because of air flow getting through the carburetor High Altitude Use This generator is not recommended for high altitude use 3 000 feet above sea level This generator features CO WARNING which will automatically shut off if dangerous levels of CO carbon monoxide is detected Instructions are included on the b...

Page 3: ...ep 1 Verify 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 DC Usage 16 STOPPING THE GENERATOR 17 MAINTENANCE CARE 17 Recommended Maintenance Schedule 17 Cleaning The Generator 17 Checking The Oil Level 18 Changing Adding Oil 18 Air Filter Maintenance 19 Spark Plug Maintenance 19 Emptying The Fuel Tank 19 Changing ...

Page 4: ... 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 excluding the states with high altitude areas identified in 40 CFR part 1068 Appendix III To exercise this warranty DO NOT RETURN TO RETAILER Instead call Customer Service toll free at 1 866 460 9436 email add...

Page 5: ...any electric outlet in your home Doing so could create a connection to the utility company power lines You are responsible for ensuring that your generator s electricity does not feed back into the electric utility power lines WARNING Do not use this generator to provide power for emergency medical equipment or life support devices Carbon Monoxide Gas When in operation the exhaust from this genera...

Page 6: ... cap Loosen the cap slowly to relieve pressure in the fuel tank Avoid spilling fuel Do not fill the fuel tank above the upper limit line Gasoline may expand during operation Do not fill to the top of the tank Always check for spilled gasoline and immediately wipe it up before starting this generator Empty the fuel tank before storing or transporting this generator Always handle fuel outdoors Befor...

Page 7: ...ITEM GEN2K Portable Gasoline Generator 7 ...

Page 8: ...ITEM GEN2K Portable Gasoline Generator 8 In addition to the previously described safety information familiarize yourself with all safety and hazard placards on this generator ...

Page 9: ...this Generator Verify that all items are included STOP If there are missing items call 1 866 460 9436 Monday Friday 8 AM 4 PM Central Time for customer service DO NOT RETURN THIS GENERATOR TO THE RETAILER Item List DC connector wires for charging 12 Volt automotive type batteries Spark plug wrench ...

Page 10: ...t Protector 12 12 Volt DC Outlet 13 Grounding Terminal 1 Fuel Tank Cap 2 Control Panel 3 Oil Access 4 Fuel Cock 5 Carburetor Choke Lever 6 Air Filter Cover 7 Recoil Starter GENERATOR COMPONENTS Observe the locations and functions of the various components and controls of this generator 9 1 2 8 10 13 12 3 7 4 6 5 11 ...

Page 11: ...HE 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 performance and service life When new from the package this generator contains no oil in the engine crankcase Add oil before operating this generator for the first time When replenishing oil for subsequent...

Page 12: ...xpand 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 3 6 Fuel Type Fresh Unleaded Gasoline Octane Rating 87 or Higher IMPORTANT Use only UNLEADED gasoline with an octane rating of 87 or higher Never use a mixture of oil and gasoline Never use old and or contaminated gasoline Avo...

Page 13: ...f 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 3 6 Fuel Type Fresh Unleaded Gasoline Octane Rating 87 or Higher Gasoline and gasoline fumes are highly flammable and explosive Handling fuel can result in serious injury or burns Do not fill the fuel tank near a heat sparks or an open flame Keep gasoline...

Page 14: ...t 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 step 6 NOTE After repeated attempts to start the engine consult the troubleshooting guide before attempting again If problems persist call 1 866 460 9436 Monday Friday 8 AM 4 PM Central Time 8 Once the en...

Page 15: ...ted 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 rated wattage of this generator Never connect devices requiring a rated wattage equal to the surge wattage of a generator A device s rated running wattage should be listed somewhere on the device itself and o...

Page 16: ...Allow the engine to run for several minutes after it has been started 2 Confirm that the electrical device is switched off prior to plugging it into this generator 4 Turn on the connected electrical devices beginning with the device with the highest rated wattage requirement and then each additional device with the next lower rated wattage requirement SOME NOTES ABOUT POWER CORDS Long or thin cord...

Page 17: ... to the schedule 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 maintenance and or failure to correct any problems prior to operating this generator can cause a malfunction which could cause death or serious injury Always follow the inspection and mai...

Page 18: ...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 and or dirt To drain the oil from this generator 1 Place a bucket underneath this generator to catch oil as it drains 2 Unscrew the oil drain plug located on the crankcase underneath the oil filler dipstick ca...

Page 19: ...ark 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 E7RTC spark plug such as NGK BPR7HS is recommended 4 Measure the spark plug electrode gap with a gauge The gap should be 0 7 0 8mm 0 028 0 031 in See Figure 9 5 If re using the spark plug use a wire brush to clean any dirt fro...

Page 20: ...asoline and add gasoline conditioner 2 months to 1 year Empty the fuel tank See Emptying the Fuel Tank in the Maintenance Care section 1 year or more Empty the fuel tank See Emptying the Fuel Tank in the Maintenance Care section Disconnect the spark plug TROUBLESHOOTING IMPORTANT If trouble persists call our customer help line at 1 866 460 9436 Monday Friday 8 AM 4 PM Central Time Symptom Cause So...

Page 21: ... on Bad connecting wires cables Try a different extension cord Bad electrical device connected to generator Disconnect device try connecting another device Generator is overloaded Reduce draw on generator to within this generator s rated wattage by reducing number of connected electrical devices Generator starts but won t stay running Choke is in Closed Choke position or gas is empty Make sure tha...

Page 22: ...ITEM GEN2K Portable Gasoline Generator 22 PARTS DIAGRAM ...

Page 23: ...ITEM GEN2K Portable Gasoline Generator 23 ...

Page 24: ...ITEM GEN2K Portable Gasoline Generator 24 s ...

Page 25: ...ITEM GEN2K Portable Gasoline Generator 25 ...

Page 26: ...ITEM GEN2K Portable Gasoline Generator 26 ...

Page 27: ...ITEM GEN2K Portable Gasoline Generator 27 ...

Page 28: ...ITEM GEN2K Portable Gasoline Generator 28 ...

Page 29: ...ITEM GEN2K Portable Gasoline Generator 29 ...

Page 30: ...ITEM GEN2K Portable Gasoline Generator 30 ...

Page 31: ...ITEM GEN2K Portable Gasoline Generator 31 ...

Page 32: ...ITEM GEN2K Portable Gasoline Generator 32 ...

Page 33: ...ITEM GEN2K Portable Gasoline Generator 33 ...

Page 34: ...ITEM GEN2K Portable Gasoline Generator 34 ...

Page 35: ...ITEM GEN2K Portable Gasoline Generator 35 ...

Page 36: ...ou retain all receipts covering maintenance on your power equipment engine but Buffalo Corp can not deny warranty solely for the lack of receipts or for your 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 equipment engine or a part has failed due to abuse ...

Page 37: ...iod stated above Buffalo Corp will maintain a supply of warranted parts sufficient to meet the expected demand for such parts 9 Any replacement part may be 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 modified parts that are not exempted by the Air Resou...

Page 38: ...rovides notification that the generator was shut off due to an accumulating CO hazard The RED light will blink for at least five minutes after a CO shut off Move the generator to an open outdoor area and point the exhaust away from people and occupied buildings Once relocated to a safe area the generator can be restarted and the proper electrical connections made to supply electrical power The RED...

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