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GEN4KDF Portable Dual Fuel Generator  

 

 

 

RECOGNIZE SAFETY SYMBOLS, WORDS AND LABELS 

 
What You Need to Know About Safety Instructions 

 

Warning and Important Safety Instructions appearing in this manual are not meant to cover all possible conditions and situations that 
may occur. Common sense, caution and care must be exercised when operating or cleaning tools and equipment. 
 
Always contact your dealer, distributor, service agent or manufacturer about problems or conditions you do not understand.

 

 

 

 

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. 

 

 

 

 

DANGER indicates an imminently hazardous situation 
which, if not avoided, will result in death or serious injury.

 

 

 

WARNING indicates a potentially hazardous situation which, 

if not avoided, could result in death or serious injury.

 

 

 

CAUTION indicates a potentially hazardous situation which, 
if not avoided, may result in minor or moderate injury.

 

 

 

CAUTION used without the safety alert symbol indicates a  

potentially hazardous situation which, if not avoided, may  
result in property damage.

 

 

2 YEAR LIMITED EMISSION-RELATED WARRANTY 

 

 
THIS ENGINE MEETS U.S. EPA EMISSION STANDARDS UNDER 40 CFR 1054.625 .The emission-related limited warranty is valid for two (2) 
years. Keep the purchase receipt and mail in the product registration card for proof of purchase. Buffalo Corp limits emission-related warranty repairs 

to authorized service centers for owners located within 100 miles of an authorized service center. For owners located more than 100 miles from an 
authorized service center, Buffalo Corp will, in its sole discretion, either pay for shipping costs to and from an authorized service center, provide for a 
service technician 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, 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 address 
[email protected]) and you will be instructed on where to take the engine for warranty service. Take the generator and proof of purchase (your 
receipt) to the repair facility recommended by the Customer Service Representative. The warranty does not extend to generators damaged or 
affected by fuel contamination, accidents, neglect, misuse, unauthorized alterations, use in an application for which the product was not designed 

and any other modifications or abuse.  
 

1 YEAR LIMITED WARRANTY  

(30 Day Limited Warranty for Commercial and Rental Purpose)

 

 

Generators are warranted to be free from defects in materials and workmanship for a period of 1 YEAR from date of original purchase. Buffalo Corp. 
is not liable for any indirect, incidental or consequential damages from the sale or use of this product. Any implied warranties are limited to 1 YEAR 
as stated, or as otherwise stated, in this written limited warranty. Some states do not allow the exclusion or limitation of incidental or consequential 
damages. Some states do not allow limitation on the length of an implied warranty. Buffalo Corp will repair or replace, at its discretion, any part that 
is proven to be defective in materials or workmanship under normal use during the 1 YEAR warranty period. Warranty repairs or replacements will be 
made without charge for parts or labor. Parts replaced during warranty repairs will be considered as part of the original product and will have the 

same warranty period as the original product. This warranty gives you specific legal rights, and you may have other rights that vary state to state. 
 

Summary of Contents for GEN4KDF

Page 1: ... 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 ON...

Page 2: ... level the generator may not function properly because of air flow getting through the mixer SURGE WATTS RUNNING WATTS MAY BE REDUCED BY 10 WHEN USING PROPANE FUEL VS USING GASOLINE AC Output Rated Voltage V 120 Rated Watts W 3500 Rated Frequency Hz 60 Phase Single Engine Engine Type 4 stroke single cylinder with forced air cooling system Ignition System Non contact transistor T C I Starting Syste...

Page 3: ...tep 1 Verify Oil Level 14 Step 2 Verify Gas Level 14 Step 3 Ground The Generator 15 STARTING THE GENERATOR 15 USING THE GENERATOR 16 AC Usage 16 STOPPING THE GENERATOR 19 MAINTENANCE CARE 19 Recommended Maintenance Schedule 19 Cleaning The Generator 19 Spark Arrestor 19 Checking The Oil Level 20 Changing Adding Oil 20 Air Filter Maintenance 21 Changing Fuel Line 21 Spark Plug Maintenance 21 Emptyi...

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 addr...

Page 5: ...grounding electrode 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 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 smell gas Breathing this poison gas can lead to headaches dizziness ...

Page 6: ...ldren or non qualified persons to operate this generator Flammable Gasoline This generator may emit highly flammable and explosive gasoline vapors which can cause severe burns or even death A nearby open flame can lead to an explosion even if not directly in contact with gasoline Do not operate this generator near open flame Do not smoke near this generator Always operate this generator on a firm ...

Page 7: ...rator only on a dry level surface Do not secure the generator with a chain or rope which would prevent it from being moved in an emergency Allow this generator to run for several minutes before connecting any electrical devices Promptly turn off any malfunctioning devices and disconnect them Do not operate an excessive number of electrical devices in excess of the wattage capacity of this generato...

Page 8: ...GEN4KDF Portable Dual Fuel Generator 8 ...

Page 9: ...GEN4KDF Portable Dual Fuel Generator 9 In addition to the previously described safety information familiarize yourself with all safety and hazard placards on this generator ...

Page 10: ...supplied with 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 Item List Spark plug wrench 5 9 Ft Regulator Hose Kit YOU MUST USE THE SUPPLIED REGULATOR FOR SAFE OPERATION ...

Page 11: ... 6 Air Filter Cover 7 Recoil Starter 8 AC Circuit Protector 9 Engine Power Switch 10 120 Volt AC Outlet 11 Grounding Terminal 12 120 Volt RV Outlet 13 Voltmeter 14 LP gas inlet GENERATOR COMPONENTS Observe the locations and functions of the various components and controls of this generator 9 1 2 8 10 11 3 4 6 5 7 12 13 14 ...

Page 12: ...RATOR 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 use of...

Page 13: ...ew fuel tank cap and set aside NOTE The fuel tank cap may be tight and difficult to unscrew 3 Slowly add fresh unleaded gasoline with an octane rating 87 or higher only to the fuel tank Be careful not to fill the fuel tank above the upper limit line NOTE 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 ga...

Page 14: ... before each use to ensure that there is sufficient quantity 1 Verify that this generator is on a level surface 2 Unscrew the oil filler dipstick cap from the engine 3 With a dry cloth wipe the oil off of the dipstick that is located on the inside of the cap 4 Fully insert the dipstick without screwing the filler dipstick cap and then remove again There should be oil on the dipstick If there is no...

Page 15: ...our area STARTING THE GENERATOR STOP Before starting this generator confirm that all the steps in the section titled Preparing the Generator for Use of this manual have been correctly completed If unsure about how to perform any of these steps call 1 866 460 9436 Monday Friday 8 AM 4 PM Central Time for customer service Disconnect all electrical loads from this generator before attempting to start...

Page 16: ...s basis The surge wattage corresponds to the maximum amount of power a generator can output for a short time Many electrical devices such as a refrigerator require short bursts of extra power for starting and stopping fan motors etc in addition to their listed rated wattage Motorized devices typically require more than their rated wattage for startup The surge wattage ability of a generator allows...

Page 17: ...nect 50Hz or 3 phase loads to this generator Do not secure the generator with a chain or rope which would prevent it from being moved in an emergency To Plug Items Into the Generator 1 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 beginnin...

Page 18: ...re 16 wire 2 5 300 600 NR 1000 600 375 250 5 600 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 NR NR 40 4800 9600 90 NR NR NR NR Figure 6 Maximum Extension Cord Lengths by Power Requirement SWITCHING BETWEEN GASOLINE PROPANE FUEL In order to swit...

Page 19: ...intenance 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 maintenance recommendations and schedules in this manual Recommended Maintenance Schedule Each Use Every Month or Each 20 Hrs Every 3 Months or Each 50 Hr...

Page 20: ...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 cap using 12...

Page 21: ... plug If it is cracked and or chipped discard and install a new spark plug A F7RTC spark plug such as NGK BPR6ES 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...

Page 22: ...ction 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 cool dry area free of excessive dust Storage Time Recommended Storage Procedure which will help prevent difficult starts Less than 1 month No storage procedure required 1 to 2 months Fill with fresh gasoline ...

Page 23: ...l 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 Inspect the float needle and make sure the orifice is not gummed up Remove the rubber gasket then clean the orifice if it is dirty Use carb cleaner Do not spray carb cleaner on the float needle or any rubber En...

Page 24: ...GEN4KDF Portable Dual Fuel Generator 24 ...

Page 25: ...GEN4KDF Portable Dual Fuel Generator 25 PARTS DIAGRAM ...

Page 26: ...GEN4KDF Portable Dual Fuel Generator 26 ...

Page 27: ...GEN4KDF Portable Dual Fuel Generator 27 EPA Model Generator Doesn t Include These Parts ...

Page 28: ...GEN4KDF Portable Dual Fuel Generator 28 ...

Page 29: ...GEN4KDF Portable Dual Fuel Generator 29 ...

Page 30: ...GEN4KDF Portable Dual Fuel Generator 30 ...

Page 31: ...GEN4KDF Portable Dual Fuel Generator 31 ...

Page 32: ...GEN4KDF Portable Dual Fuel Generator 32 WIRING DIAGRAM ...

Page 33: ...ll off road engine but Buffalo Corp cannot deny warranty coverage solely for the lack of receipts or for your failure to ensure the performance of all scheduled maintenance As the small off road engine owner you should however be aware that Buffalo Corp may deny you warranty coverage if your small off road engine or a part has failed due to abuse neglect or improper maintenance or unapproved modif...

Page 34: ...ranty period defined in Subsection b 2 Buffalo Corp must maintain a supply of warranted parts sufficient to meet the expected demand for such parts and must obtain additional parts if that supply is exhausted 8 Manufacturer approved replacement parts that do not increase the exhaust or evaporative emissions of the engine or evaporative emission control system must be used in the performance of any...

Page 35: ...ntrol Solenoids 9 Electronic Controls 10 Vacuum Control Diaphragms 11 Control Cables 12 Control Linkages 13 Purge Valves 14 Gaskets 15 Liquid Vapor Separator 16 Carbon Canister 17 Canister Mounting Brackets 18 Carburetor Purge Port Connector Note As they relate to the evaporative emission control system e Written instructions for the maintenance and use of the evaporative emissions control system ...

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