Model # GENSD7

Internet # 100660521

5,500/7,000-Watt Quiet Diesel Powered Contractor Generator

This item has been discontinued.
The Home Depot no longer carries this specific product.

  • Rated Voltage: 120V / 52.5 A; 240V / 26.25 A
  • Engine Noise Level: less than 70 db
  • 120V/220V Voltage Selector Switch

Frequently Bought Together

Product Overview

The Pro Series Diesel 5,500/7,000-Watt Generator is ideal at the job site to power tools and equipment. Its equipped with two 120-Volt outlets, a 120-Volt twist lock outlet, a 120/240-Volt outlet and a 12-Volt DC terminal for battery charging. With a full load of 5,500 running watt and 7,000 surge watt this generator can run for up to 7 hours and runs on readily available diesel fuel. The Automatic-Voltage Regulator controls power output so tools wont be damaged by power fluctuations. This unit is designed for Pros with features like an eye hook to hang from cranes and scaffolding, and is engineered to run for long periods without too much noise or overheating. Engine noise level is less than 70 db, quite enough to work around all day long. Its also easy to maneuver with the four installed wheels. Other pro features such as an automatic low oil shutdown, heavy duty housing and electric start feature make it ideal for contractors. A lawn tractor battery (not included) must be installed to use the generator's electric start feature. Consider using a riding lawnmower battery with a minimum of 360 CCA (Cold Cranking Amps). The Unit requires 58 ounces 15W-40 Diesel Grade Oil to operate.

  • Two 120-Volt 25 Amp outlets, one 120-Volt / 240-Volt 25 Amp outlet (twist lock) and one 12-Volt 8.3 Amp DC connection with ground
  • Includes wheels for mobility and eye hook for hanging from cranes and scaffolding
  • Runs on diesel fuel, 4 gallon fuel tank capacity, runs for 7 hours with a full load
  • Electric start system (12-Volt battery not included but readily available at Home Depot or wherever 12-Volt riding lawnmower/motorcycle batteries are sold), Battery Specs: Max, 7 3/4 in. L x 5 1/4 in. H x 7 in. W, 360 minimum CCA (Cold Cranking Amps) any brand with similar specs may be used, the battery may be smaller in size, and have a higher CCA
  • Self excited, 2 pole, single phase, AVR automatic-Voltage regulator, automatic low oil shutdown
  • Single phase 9 HP engine
  • Rated frequency 60 Hz/Rated output 6.3 kw, rated-Voltage 120/240-Volt/Max output 7.0 kw, rated current 19.2 Amp/Power factor 1.0
  • Max operating height above sea level 3,280 ft., max environment temp 104 Deg F
  • Weight 392 lb. size: 37.8 in. x 21.8 in. x 30.7 in.
  • EPA Approved
  • The Unit requires 58 ounces 15W-40 Diesel Grade Oil (Not Included) to operate
  • Click on the “More Info” tab to download the specifications pdf to view the -Wattage requirement guide

Info & Guides

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Product Depth (in.) 
Product Height (in.) 
Product Length (in.) 
Product Width (in.) 


Built-in inverter 
CA (CARB) Compliant 
Not CARB Compliant 
Continuous Wattage 
Engine Displacement (cc) 
Engine Make 
OEM Branded 
Fuel tank capacity (gallons) 
Fuel type 
Full load fuel consumption (gallons/hour) 
Generator Features 
Auto Idle Control,Automatic Voltage Regulation,Fuel Gauge,Low Oil Shutdown,Wheel Kit 
Horsepower (hp) 
9 hp 
Number of circuits/outlets 
Operational volume (dB) 
Osha Required GFCI Outlets 
Peak Wattage 
Product Weight (lb.) 
398 lb 
Run time at 50% load (hours/tank) 
Voltage (volts) 
Wheel Kit Included 

Warranty / Certifications

Certifications and Listings 
1-UL Listed 
Manufacturer Warranty 
1 Year Limited 

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Customer Questions & Answers

2 Questions3 Answers

Customer Questions & Answers

5,500/7,000-Watt Quiet Diesel Powered Contractor Generator
5,500/7,000-Watt Quiet Diesel Powered Contractor Generator

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2 answers

Where I can buy the filters?

This question is from 5,500/7,000-Watt Quiet Diesel Powered Contractor Generator
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July 5, 2015
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Asked by
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July 8, 2015
Hi you can buy anything thing for it, Call the number from the book you got with it.
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Asked by
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July 6, 2015
To purchase parts for the generator please contact customer service at 636-532-9888. Thank you.
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1 answer

I need a New maintenance manual

This question is from 5,500/7,000-Watt Quiet Diesel Powered Contractor Generator
Asked by
Brockville Ontario Canada
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December 13, 2015
I have lost the manual for this item, can you sell me a new one
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Answer (1)

Asked by
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June 3, 2016
Please email info@buffalotools or contact our customer service department at 800-568-6657.
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Customer Reviews

Rated 3.6 out of 5 by 29 reviewers.
Rated 1.0 out of 5.0 by Dont Waste your time, effort or money! I have owned a ton of generators, this is the worst one I have ever come across. This unit only lasts about 6hrs before it breaks down, repaired it and it only keeps breaking down. Company does not stand behind its product. Its a very expensive paper weight! Don't buy this headache!! January 26, 2016
Rated 2.0 out of 5.0 by Pro Series 7000 Watt Diesel Generator The generator started giving me trouble from the begining before I even turn it on. First of all one of the tank hoses was cut from the edge so when I was fueling it with diesel it was driping all over the place. I was able to quick fix it and was runing fine for about five days when the air filter holding bracket fell apart the welding did not hold the vibration. If they could manage to weld that part and that hose which has an sharp edge next to it can hold I think it can do its job. Also it does not come with a battery. I think if those problems can get fix this might be a good generator but hard to tell since I was not able to try it for long. September 5, 2012
Rated 4.0 out of 5.0 by Good generator,good price... good price for the generator,i use it for my outside lights,power tools.. June 4, 2015
Rated 5.0 out of 5.0 by This Generator Runs Everyday for our Excavating Business Flawlessly We have owned this for a year and a half. It powers our bulk refueling station which we use to refuel at the end of every day. Whether it is 90 or -10 degrees outside it starts and performs flawlessly day in and day out. We actually plan on purchasing additional units to run more refueling stations. Reading the reviews, this unit may not be what your looking for if you do not intend to use it frequently, but if you plan on running it all the time, this has given us no problem. February 6, 2015
Rated 5.0 out of 5.0 by Great Value! Excellent operation!! I wanted to take a moment to express our satisfaction with this product and with Buffalo Tools in general. We are a manufacturer of equipment and needed a diesel generator offering on one of our products. We were having issues with finding units small enough to be affordable to our customers. That is when we found the Buffalo 7000 Watt Generator. We reached an agreement with Buffalo to purchase as an OEM and our customers have never been happier. We even replaced some of our older units with lower quality generators with the better and more efficient Buffalo unit. We also use the propane unit. Their customer support and dealer support system is second to none. Working with Tyler was a great deciding factor in choosing to stick with the Buffalo units as he stayed on top of our concerns and really pushed hard for us to get the OEM line so we could offer the warranty to our customers. We Highly recommend Buffalo Tools for your diesel and propane operated generator solution. - Separation By Design, Inc February 9, 2015
Rated 4.0 out of 5.0 by Good I have had no problems with it just turn the key and go February 3, 2015
Rated 3.0 out of 5.0 by Good value for price. Bottomline is...you either going to get a good one that last a while, or you will get a lemon. This generator could not produce 7000 watts no matter how hard it tried. Peak wattage is 6000 at the most and 5000 running watts. The description says it outputs 20 amps at 240 which is 4800 watts. And the engine is sort of a mystery, the specification and description of this item are different. One says 409 cc which is a 9 HP engine, and the other says 418 cc. I guess you really have to look at it and inspect it to know what you are paying for. Overall, good quality if you get a good one. June 20, 2011
Rated 5.0 out of 5.0 by Excellent Diesel Very Good Price and good quality, easy to use. January 20, 2015
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