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Generac · Portable generator · GP6500 COsense 49ST

GP6500 COsense 49ST

GP6500 COsense 49ST delivers up to 6,500 running watts and 8,125 starting watts from a portable gasoline system.

6,500W ratedPortable generatorGasolineListed available
Check Generac price Official listed price $939.00
Portable Generator, 6500 | With COsense | 49ST
Product image · Generac

Product decision summary

Researched by · reviewed under the FMG editorial standard · Sep 15, 2026

Trace the evidence · not a hands-on review

Bottom line

Best for specific needs for home essentials & rv and recreation.

Best for: Home essentials & RV and recreation

Running output

6,500W

Fuel / power

Gasoline

Weight

172 lb

Strongest reasons

  • GP6500 COsense 49ST delivers up to 6,500 running watts and 8,125 starting watts from a portable gasoline system.
  • Product weight is lighter than 94% of its class.
  • 6,500W of rated running output.

Know before buying

A comparable published sound rating is unavailable, so verify noise expectations before using it near living areas.

Best current buying route

$939

MSRP at Generac

The only verified seller destination. Its listed price is known, but shipping and delivered cost still need confirmation. Confirm price, stock, shipping, and the exact model on the seller’s site.

Check price & availability

Affiliate links may earn us a commission at no added cost to you. Disclosure

Never run a fuel-burning generator in a home, garage, shed, or other enclosed or partly enclosed space.

Price intelligence Evidence ledger Accessories & manuals

Key specifications

The numbers that drive the decision.

Published values stay labeled, and every usable metric includes class context. Missing data is shown instead of estimated.

Open complete specifications
SpecificationThis model
Running output6,500WHigher than 6% of its class
Peak / starting output8,125WHigher than 6% of its class
Published runtime11.5 hrLonger than 53% of its class
Product weight172 lbLighter than 94% of its class
Published sound levelNot publishedNo class comparison available
Fuel / power sourceGasolinePortable generator
Best current price$939MSRP at Generac

Class comparisons use 144 high output portable generators. Runtime figures can use different loads, fuels, or test conditions; confirm the model manual before planning fuel or battery duration.

Product gallery & complete specifications Official imagery, full spec tables, use cases, and source linksView details

Infographic gallery

Output, stored energy, charging, and portability.

01 · Usable output

6,500W rated output

Gasoline6,500W / 8,125W

The comparison uses Generac’s published rated and peak, surge, or maximum output figures.

02 · Energy & runtime

Energy source

Gasoline

Published runtime guidance

11.5 hours at 50% load on the primary listed fuel

03 · Size & construction

172 lb

Listed weight

27.2 × 27 × 26.5 in

Dimensions

Battery or engine
OHV
Warranty
See the official Generac warranty document for this model
04 · Charging & continuity

Charging or integration

Fueling and starting per Generac instructions; manual transfer equipment sold separately

Backup transfer

Not an automatic standby system; approved manual transfer equipment is required for home connection

Noise

No official dBA figure listed on the model page

Official product gallery

Product views and factory feature graphics.

The current official image set for GP6500 COsense 49ST includes product views, connection diagrams, feature explanations, and compatible system configurations where Generac publishes them.

GP6500 COsense 49ST official Generac image 1
Published by Generac · image 1 of 8
GP6500 COsense 49ST official Generac image 2
Published by Generac · image 2 of 8
GP6500 COsense 49ST official Generac image 3
Published by Generac · image 3 of 8
GP6500 COsense 49ST official Generac image 4
Published by Generac · image 4 of 8
GP6500 COsense 49ST official Generac image 5
Published by Generac · image 5 of 8
GP6500 COsense 49ST official Generac image 6
Published by Generac · image 6 of 8
GP6500 COsense 49ST official Generac image 7
Published by Generac · image 7 of 8
GP6500 COsense 49ST official Generac image 8
Published by Generac · image 8 of 8

Complete specifications

The complete factory data available for comparison.

These pages retain Generac's model-specific output, charging, battery, port, continuity, dimensions, environmental, engine, fuel, app-control, and warranty fields where published.

Run combustion generators outdoors only. Keep the generator at least 20 feet from occupied buildings with exhaust directed away from doors, windows, and vents.

Comparison summary

Gasoline output
6,500W running / 8,125W starting or surge
Energy source
Gasoline
Dimensions
27.2 × 27 × 26.5 in
Listed weight
172 lb
Price and availability
$939.00 official MSRP; check current availability from Generac

Factory output & connection specifications

Generac model number
G0076803
Gasoline output
6,500W running / 8,125W starting
Fuel Tank Capacity (gal)
7.9
Fuel Tank Capacity (l)
29.9
Oil Capacity (qt)
1.06
Oil Capacity (l)
1
Running Watts (W)
6,500
Starting Watts
8,125
WiFi Factory Installed
No

Factory charging & battery specifications

Battery Included
No

Factory engine, fuel & runtime specifications

Fuel Type
Gaseous
Oil Type
Gaseous
Starting Method
Recoil
Engine Type
OHV
Run Time @@ 50% Load (hr)
11.5

Factory dimensions & operating specifications

Dimensions
27.2 × 27 × 26.5 in
Listed weight
172 lb
Wheel Kit Included
Yes
Length (in)
27.2
Length (cm)
69.2
Width (in)
27
Width (cm)
68.4
Height (in)
26.5
Height (cm)
67.4
Weight (kg)
86
Weight (lb)
172

Additional factory specifications

Base model / SKU
76803_
Official MSRP
$939.00
Extension Cord Included
No
Parallel Capable
No
Transfer Switch Included
No
Non Wi-Fi / NFPA 110 Capable
No
Mobile Link
No
Quiet Test
No

Official feature details

System capability

GP6500 COsense 49ST delivers up to 6,500 running watts and 8,125 starting watts from a portable gasoline system.

Power delivery

GP Series 6500 COSENSE® 49ST Portable Generator.

Safety and controls

Generac's GP6500 COsense® 49ST portable generator offers PowerRush™ Advanced Technology , which delivers more than a 40% increased starting capacity* allowing you to do more with less.

Runtime and fueling

Generac's OHV engine and large-capacity steel fuel tank ensures extended engine life and run times, while the steel tube cradle provides added strength.

Portability detail

The low-oil feature protects the generator from damage.

Connection options

The GP6500 COsense® 49ST can be easily transported across rough or difficult terrain with the heavy-duty wheels and easy fold-down handle.

Ownership note

Even maintenance is a breeze, with the hour meter keeping track of necessary upkeep at regular intervals.

Additional manufacturer note

Featuring PowerRush™ ADVANCED TECHNOLOGY – Delivers over 40% more starting capacity allowing you to do more with less.*.

Best-fit uses

  • Home essentials
  • RV and recreation
  • DIY projects
  • Jobsite tools

Standout features

  • 6,500W maximum rated output
  • 8,125W maximum starting or surge output
  • Gasoline
  • Portable generator

Match capacity and output to your actual loads.

Use the independent calculator before choosing a battery system or generator.

Check my power plan
Sources: Generac GP6500 COsense 49STGenerac productsOfficial manualVerified September 15, 2026

Price & Availability

Compare the whole buying route.

The lowest sticker price is not always the best offer. We rank exact-model seller pages using price, stock, shipping, freshness, returns, and warranty details—then show what is still unknown.

Price and delivered cost

Shipping is included only when the seller publishes a usable amount.

Stock and freshness

Current, low-stock, preorder, and stale records are scored differently.

Purchase protections

Published return and warranty terms improve evidence confidence.

Affiliate-neutral ranking

Commission status is recorded but never adds ranking points.

Watch this model

Save it to your shortlist to retain the current price snapshot and turn price and safety watches on or off.

Best current buying route

Generac GP6500 COsense 49ST

Review soon

MSRP

$939

at Generac · Verify stock

Verify offer

Seller options

1

1 with price

Offer rank

57/100

Relative to listed sellers

Data confidence

55%

4 open fields

Delivered totals

0/1

Shipping included

The only verified seller destination. Its listed price is known, but shipping and delivered cost still need confirmation.

Seller data checked Sep 15, 2026.

Shipping not yet verified.

Open fields: confirmed stock, delivered cost, return window, warranty term.

Prices, local stock, shipping, taxes, installation, and seller terms can change. Confirm the exact model and final checkout total before buying. Affiliate disclosure.

Seller comparison

Every verified exact-model destination.

Browse all priced models

One exact-model seller destination is currently verified. We show the unknown fields so a single listing is never presented as a broad market comparison.

Generac

Best overallLowest listed
Review soon

$939

Final total at checkout

Availability
Verify stock
Shipping
Shipping not yet verified
Returns
Not verified
Warranty
Not verified
Verify seller

55% data confidence · checked Sep 15, 2026

Price history

A durable record, starting with verified snapshots.

We preserve each dated seller observation instead of replacing the old number. Trends use the lowest verified listed price on each observation date—not an estimated market price.

Generac

$939 · Verify stock

Verify offer

Ownership

What living with it looks like.

Ownership requires a safe fuel plan, hour-based engine service, correct storage, and confidence that parts and support are accessible.

Ownership rule

Use the exact Generac GP6500 COsense 49ST manual for maintenance intervals, fluids, storage limits, and warranty requirements. Similar models are not interchangeable.

Open owner’s manual Manufacturer support

Published warranty

See the official Generac warranty document for this model

Coverage can vary by use, seller, and region. Confirm eligibility and exclusions before purchase.

Service information

2 official resources

An owner or operator manual is linked below for exact service intervals.

Routine upkeep

Engine service required

Oil, filters, spark plug, fuel system, and starting battery needs vary by model and hours used.

Handling & storage

172 lb · Gasoline

Plan a wheeled route, stable storage position, and help for steps or vehicle loading.

Practical care plan

From delivery to long-term readiness

  1. 1

    Day one

    Register and record the exact unit

    Save the receipt, serial number, seller, warranty terms, and model-specific manual before packaging is discarded.

  2. 2

    Before first load

    Complete setup and break-in correctly

    Add the specified oil, inspect the fuel system, position the generator outdoors, and follow the exact break-in and first-service instructions in the manual.

  3. 3

    Before every use

    Check the safety-critical basics

    Check oil level, leaks, cords, outlets, grounding instructions, CO-safe placement, and the transfer equipment needed for any building connection.

  4. 4

    By hours and season

    Log service and keep it outage-ready

    Track running hours and perform oil, filter, spark-plug, fuel-system, and starting-battery service at the intervals published for this exact model.

Before you buy

Five ownership questions to settle first

  • Confirm that See the official Generac warranty document for this model applies to your seller, region, and intended use.
  • Open the official manual for GP6500 COsense 49ST and review setup, service intervals, warnings, and storage requirements.
  • Verify access to Generac parts, authorized service, and a practical return path in your area.
  • Plan approved fuel storage, outdoor operating clearance, weather protection, and safe refueling.
  • Plan how the 172 lb unit will move over steps, gravel, and door thresholds.
Manuals and compatible accessories Compare seller protections

Evidence

See the proof behind the conclusion.

We separate sourced facts, reproducible calculations, editorial judgments, and missing evidence. That makes every important claim easier to inspect—and harder to overstate.

Published-data coverage

88%documented

7 of 8 relevant evidence fields are documented for this model.

Source-backed editorial analysis—not a hands-on or laboratory test.

Read our evidence standard Explore original market research

Source record

3 traceable sources

Last reviewed Sep 15, 2026

Hands-on testing

Checking ledger…

No manufacturer data is presented as an independent test

Verified owners

Checking reports…

Percentages stay hidden until the sample qualifies

CPSC screening

3 potential matches

39 generator recall records screened

88%

Documented fields

3

Traceable sources

4

Reproducible calculations

1

Open evidence gaps

Original calculation

Published surge reserve

1,625W

8,125W peak − 6,500W running

25% above rated running output. This is arithmetic headroom, not a promise that every motor load will start.

Original calculation

Rated power density

37.79 running W/lb

6,500W ÷ 172 lb

A catalog-derived portability ratio. It does not account for handles, wheels, shape, or how the weight feels in use.

Original calculation

Listed dollars per running kW

$144.46/kW

$939 ÷ 6.5 running kW

A point-in-time catalog value ratio. It excludes tax, shipping, accessories, fuel, service, and battery expansion costs.

Original calculation

Strongest class-relative spec

94th percentile

Product weight: 172 lb ranked within 144 high output portable generators

Lighter than 94% of its class

Claim-by-claim evidence ledger

Evidence typeClaimBasisTrace
Published factSource-backed6,500W running and 8,125W peak output are recorded for this model.Model-specific output fields in the catalog.Official model source
Published factSource-backedGasoline power and 172 lb product weight are recorded.Published configuration and dimensional data.Official model source
Original calculationReproduciblePublished surge reserve: 1,625W.8,125W peak − 6,500W runningCalculation standard
Original calculationReproducibleRated power density: 37.79 running W/lb.6,500W ÷ 172 lbCalculation standard
Original calculationReproducibleListed dollars per running kW: $144.46/kW.$939 ÷ 6.5 running kWCalculation standard
Editorial judgmentEditorialBest for specific needs for home essentials & rv and recreation.Class score 42/100, declared best use, comparative specifications, and explicit buying cautions.Inspect the score
Editorial judgmentEditorialA comparable published sound rating is unavailable, so verify noise expectations before using it near living areas.Editorial risk check based on product category, weight, output, price availability, and missing fields.Judgment standard
Open evidence gapCautionSound level is not sufficiently documented in the current record.The field remains unknown rather than being inferred from a related model or marketing language.Not available

What this evidence cannot prove

  • No Find My Generator hands-on test, instrumented load test, teardown, or long-term ownership trial is claimed for this page.
  • Manufacturer specifications may use different fuels, loads, test distances, temperatures, or operating modes. Cross-brand comparisons inherit those differences.
  • The listed price is a dated snapshot and may not equal the current delivered price.
  • Sound level is missing and receives no invented or estimated value.

Editorial analysis for Generac GP6500 COsense 49ST. Source record last verified Sep 15, 2026. Corrections can be submitted through the contact page with a model-specific source.

Ownership resources

Accessories, manuals, and documents.

Start with the exact Generac GP6500 COsense 49ST model or item number. Accessory families can look alike while using different connectors, electrical limits, engines, or mounting points.

Compatible accessories

Match by model and connection.

Verify exact fit

Generator power cord or inlet connection

Use a correctly rated cord or professionally selected inlet connection for the intended load.

Match voltage, amperage, blade pattern, and wire rating to the generator receptacle. Home connections require approved transfer equipment and qualified installation.
View official accessory options
Verify exact fit

Parallel kit

This model’s published information references parallel operation. Use the manufacturer’s matching kit and pairing rules.

Confirm that the kit explicitly names GP6500 COsense 49ST or its exact generator family before connecting another unit.
View official accessory options
Verify exact fit

Maintenance kit and service parts

Model-matched filters, spark plugs, batteries, oil supplies, and service parts support scheduled maintenance.

Match the complete GP6500 COsense 49ST model or item number and follow the maintenance table in its manual.
View official accessory options
Verify exact fit

Storage cover or approved running shelter

A fitted storage cover protects a cooled, stored generator. A running shelter must be designed for generator operation.

Never run a fuel-burning generator indoors or inside a storage cover. Follow the manual’s clearance and ventilation requirements.
View official accessory options

Manuals & PDFs

Official product materials.

Owner’s or operator’s manualPDFOperating, safety, maintenance, and troubleshooting instructions for GP6500 COsense 49ST.Official product pageProduct pageCurrent manufacturer overview, notices, specifications, downloads, and support links.

Compatibility note: Links lead to manufacturer or official retailer resources. Confirm the full model or item number, connector type, voltage, amperage, and published compatibility list before buying. Installation involving a home panel, inlet, transfer switch, or fuel plumbing should be handled as required by local code.

Deeper analysis

Open the details you need

The key decision is above. These supporting scorecards, owner signals, and evidence notes stay out of the way until you want to inspect them.

Fit and score detailsSee the class benchmarks and personalize the fit score for your needs.

Find My Generator score

42/ 100

Best for specific needs

Compared with 144 high output portable generators in the current catalog.

Power6

Running and peak output versus the class

Endurance53

Longest published runtime figure

Portability94

Lower weight scores higher

Fuel flexibility55

Single-fuel operation

Value59

Output or stored energy per listed dollar

Class comparison

See what each spec really means.

A number is more useful with context. Each row shows this model beside its class median and translates the difference into a percentile.

Running output

Higher than 6% of its class

This model · 6,500W
Median · 9,100W

Peak output

Higher than 6% of its class

This model · 8,125W
Median · 11,350W

Published runtime

Longer than 53% of its class

This model · 11.5 hr
Median · 11 hr

Product weight

Lighter than 94% of its class

This model · 172 lb
Median · 216 lb

How the score works: Scores use published specs and are relative to comparable products in this catalog. Missing specs are excluded and remaining weights are normalized. Runtime is the longest manufacturer-published figure and may use a different load or fuel than another model.

Size a generator for your own appliances

Starter Fit Score

91/ 100

Excellent fit

For a 3,000W target and a $1,500 budget.

Clears your critical profile limits

Why it scored this way

A score you can inspect and change.

This personal score is separate from the model’s class score. It measures fit against your priorities and gives neutral partial credit when price or noise data is missing.

Power fit

33.3/35

Clears your 3,000W running target.

Budget fit

20/20

$939 is within your budget.

Fuel fit

15/15

Gasoline works with your flexible fuel preference.

Portability

7.5/10

172 lb against your medium portability priority.

Noise fit

6.5/10

Noise is not published; quietness gets a neutral score.

Use-case fit

8.5/10

Home-backup fit rewards adequate output and fuel flexibility.

Tune my profile
Testing, reviews and evidenceCheck hands-on testing status, owner reliability signals, sources, and data confidence.
Checking the hands-on test ledger…

Testing protocol

The methods behind every result.

This category-specific protocol defines the questions, equipment, conditions, outputs, and safety gates required for this exact model. Published specifications stay visibly separate from hands-on measurements.

Open the hands-on test ledger Read the full test protocol Download measurement worksheet

Manufacturer-published baselines

Rated running output

6,500W

Published

Peak / starting output

8,125W

Published

Product weight

172 lb

Published

Published sound level

Not published

Not published

These numbers organize the test plan. They are not independent confirmations.

Model-specific test matrix

Questions the measurements must answer.

01

Planned measurement

Continuous output & regulation

Pending

Can GP6500 COsense 49ST hold useful loads without unacceptable voltage or frequency drift?

After manufacturer-specified warm-up, apply a correctly rated resistive load bank at 25%, 50%, 75%, and 100% of rated running output. Hold each step for a defined interval and continuously log watts, volts, frequency, and protective events.

Sustained wattsVoltage rangeFrequency rangeFaults or shutdowns
02

Planned measurement

Starting-load response

Pending

How much voltage and frequency sag occurs during a repeatable stepped starting load?

Use a controlled, instrumented starting-load fixture within published limits. Repeat the same step three times and record the lowest voltage, lowest frequency, recovery time, and whether protection trips.

Peak delivered wattsVoltage sagFrequency sagRecovery time
03

Planned measurement

Fuel use & runtime

Pending

How much usable energy is produced from a measured fuel quantity?

Outdoors at a controlled load, record the starting and ending fuel mass or volume using a safe approved method. Log elapsed time and delivered watt-hours without refueling during the valid measurement window.

Runtime at stated loadFuel per hourkWh per unit of fuelTest fuel and mode
04

Planned measurement

Sound profile

Pending

How loud is the unit under repeatable operating loads?

At an open outdoor site, measure A-weighted sound with a calibrated meter at 7 m / 23 ft on four sides at idle or eco, 25%, 50%, and 75% load. Publish distance, meter response, wind, surface, and ambient level.

dBA by side and loadAmbient dBADistanceOperating mode
05

Planned measurement

Cold & hot starting

Pending

How consistently does the unit start under documented conditions?

Follow the manual exactly and record three ambient-temperature starts plus three heat-soaked restarts. Report attempts, elapsed time, start method, battery state, and any intervention.

Attempts per startStart timeAmbient temperatureStart method

Controlled conditions

  • Record the exact model, serial number, firmware, sample source, and test date before any measurement.
  • Log ambient temperature, humidity, elevation, wind, surface, and background sound for every test block.
  • Record instrument model, range, accuracy, and most recent calibration or verification date.
  • Repeat timing, starting, and sound measurements three times when conditions allow; publish every valid run.
  • Keep original notes, load logs, meter exports, photos, and any excluded-run explanation with the result.

Required equipment class

  • Rated resistive or programmable load bank
  • True-RMS power, voltage, and frequency logger
  • Calibrated Class 1 or Class 2 sound-level meter
  • Approved fuel-measurement equipment and fire protection
  • Weather meter, timer, tachometer, and non-contact thermometer

Safety gate

Operate fuel-burning equipment outdoors only, far from occupied structures, openings, and ignition hazards, with working carbon-monoxide monitoring for personnel.

Testing is for qualified personnel using correctly rated load equipment and the manufacturer’s required grounding, bonding, clearance, and protective-device instructions.

Never connect a generator directly to building wiring or bypass overload, temperature, battery, GFCI, or carbon-monoxide shutdown protection.

Stop a run for unstable voltage or frequency, overheating, fuel or electrolyte leakage, abnormal sound, damaged wiring, or any manufacturer fault indication.

Badge rule: this product receives no “FMG Tested” label or score benefit until a real unit, instruments, conditions, valid runs, raw records, and limitations are documented under the public protocol.

Verified owner reliability

What happens after the honeymoon period?

Long-term reports from confirmed owners show starting, maintenance, failure, support, and recommendation outcomes for the Generac GP6500 COsense 49ST.

See how ownership is verified

Verified owners only

Be the first confirmed owner to report back.

Checking reports…

Reliability percentages stay hidden until at least 5 ownership-verified reports are published for this exact model — 5 more needed.

Ownership checked

Purchase or registration evidence is reviewed privately.

Time in service

Reports separate new ownership from 12+ month experience.

Failures documented

Repairs and maintenance are captured, not buried in a star.

Reports stay private while ownership and model details are checked. Contact information is never shown publicly.

Data trust & safety

Fresh specifications. Visible recall checks.

We show when this record was verified, where its specifications came from, and whether its model number appears in the official CPSC generator-recall dataset.

Review soon

Specification freshness

Last verified
Sep 15, 2026
Review target
Oct 15, 2026
Primary source
Manufacturer / official listing

Prices can change faster than technical specifications. Always confirm the current price, exact model number, and manual before purchase.

CPSC model screening

Potential recall match found

39 records checked

Stop and verify the full model and serial number before use or purchase. A model-family text match does not prove every unit is included, because many recalls apply only to specific serial ranges.

CPSC recall 26407 · Apr 16, 2026

Generac Power Systems Recalls Portable Generators Due to Risk of Serious Injury or Death from Burn and Fire Hazards

Hazard: When first filling the recalled generator with gasoline, fuel can leak from the carburetor, posing a risk of serious injury or death from fire or burn hazard. Consumers with generators that have previously been filled with enough gasoline to move the gauge off "E," or have been used without any gasoline leakage, can continue to be used.

Open official recall notice

CPSC recall 23040 · Nov 10, 2022

CPSC Reannounces Recall of Generac Portable Generators; Additional Finger Amputation and Crushing Injury Reported; New Repair Kit Available

Hazard: An unlocked handle can pinch consumers' fingers against the generator frame when the generator is moved, posing finger amputation and crushing hazards.

Open official recall notice

CPSC recall 21173 · Jul 29, 2021

Generac Recalls Portable Generators Due to Finger Amputation and Crushing Hazards

Hazard: An unlocked handle can pinch consumers' fingers against the generator frame when the generator is moved, posing finger amputation and crushing hazards.

Open official recall notice
Search CPSC directly Dataset checked Sep 16, 2026

Research owner

Founder & lead researcher

Editorial sign-off

Find My Generator Editorial Review

Accountable editor: Andrew Petla

Review scope: exact model identity, published specifications, calculation inputs, source quality, safety language, and affiliate independence. This is an internal editorial review, not third-party engineering, electrical, or safety certification. Hands-on testing is claimed only when a complete test record is published.Request a correction.
Read the full data methodology

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