Model # GENSD7

Internet #100660521

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

Discontinued PRO-SERIES

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

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

Where I can buy the filters?

Asked by: Max123
Hi you can buy anything thing for it, Call the number from the book you got with it.
Answered by: enchantor350
Date published: 2015-10-17

I need a New maintenance manual

I have lost the manual for this item, can you sell me a new one
Asked by: Jimmybird
Please email info@buffalotools or contact our customer service department at 800-568-6657.
Answered by: Buffalo Bill
Date published: 2016-06-04
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Customer Reviews

5,500/7,000-Watt Quiet Diesel Powered Contractor Generator is rated 3.6 out of 5 by 29.
Rated 2 out of 5 by from NOT HAPPY Purchased but not used right away, had to find a battery to fit. When it worked it worked great. Within 40 days of purchase and very little use, the outlets no longer worked and fuel is leaking somewhere. Waited another two weeks of trying to reach someone that can tell us where to take it for warranty work, and when we dropped it off (not very easy given the weight) they said that shipping parts are not always covered under warranty and had to provide a deposit. Really? You made the defective machine. Waiting now to see if they can fix it. Use your machine within the 30 days return policy for the store, that way they can deal with the manufacturer if it breaks. Hope I get it back before summer is over, the whole reason for buying it in the first place.
Date published: 2013-07-23
Rated 1 out of 5 by from new, will not start ! Lots of good points but the big strike against this is that mine will NOT even puff or fire AT ALL. Only ran it three times and at first it was o.k., but did smoke a LOT until warmed up. It is dead today, even after 2 hours on the line with ''help line'' doing all sorts of experiments that I hoped to AVOID with a NEW unit ! To make it worse, the first one arrived DAMAGED by the shipper
Date published: 2013-09-04
Rated 3 out of 5 by from Good value for price. Bottomline 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.
Date published: 2011-06-20
Rated 5 out of 5 by from Expesnive but Worth it I've been very pleased with this Deisel generator; its ideal for my concrete forming crew who use it daily for several months now. We like that it's rugged and doesn't sound too loud. Also like the GFCI outlet, push button start and the low oil "idiot" light.
Date published: 2012-06-13
Rated 5 out of 5 by from excellent value Best price on a diesel generator on the market. Very pleased with the delivery time, the instructions were good, setup very quickly and was running in a matter of minutes. Been in the field for about 60 hrs with no issues. very pleased with purchase
Date published: 2011-09-19
Rated 2 out of 5 by from 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.
Date published: 2012-09-05
Rated 1 out of 5 by from Nothing quiet or silent about this generator I bought three of this generator to be used outside the US for its supposedly quiet property. The noise from these generator was deafening. I will not recommend it if you are looking for something quiet. It was a total disappointment and a waste of time and money for me. The noise and vibration will put an earthquake to shame. At this rate of vibration the durability is highly questionable.
Date published: 2013-09-01
Rated 5 out of 5 by from No issues whatsoever Arrived in great shape..started right up..has run for almost 4 days now with only a couple of hours brother owns a construction company and will be buying at least two of these for his sites. Very happy with this, even though at first I was hesitant based on some reviews.
Date published: 2012-01-21
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