Briggs & Stratton · Portable generator
4,375 starting watts and 3,500 running watts from a 208 engine.
Product decision summary
Researched by Andrew Petla · reviewed under the FMG editorial standard · Sep 15, 2026
Trace the evidence · not a hands-on reviewBottom line
Best for: Portable power
Running output
3,500W
Fuel / power
Gasoline
Weight
115 lb
Strongest reasons
Know before buying
A reliable public price is not currently published. Confirm the delivered total and return terms with the seller.
Scores at a glance
40
Class score
84
Starter fit
Best for specific needs among 130 mid output portable generators.
Strong fitBest current buying route
Check current price
See current offers at Briggs & Stratton
The only verified seller destination for this exact model. Confirm current price and stock with the seller. Confirm price, stock, shipping, and the exact model on the seller’s site.
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 & manualsKey specifications
Published values stay labeled, and every usable metric includes class context. Missing data is shown instead of estimated.
| Specification | This model |
|---|---|
| Running output | 3,500WHigher than 11% of its class |
| Peak / starting output | 4,375WHigher than 14% of its class |
| Published runtime | 14 hrLonger than 62% of its class |
| Product weight | 115 lbLighter than 61% of its class |
| Published sound level | Not publishedNo class comparison available |
| Fuel / power source | GasolinePortable generator |
| Best current price | Check current priceSee current offers at Briggs & Stratton |
Class comparisons use 130 mid output portable generators. Runtime figures can use different loads, fuels, or test conditions; confirm the model manual before planning fuel or battery duration.
Visual spec gallery
4,375 starting watts
Starting wattage is the short surge available for motor-driven loads. Size the generator around running load plus the largest expected startup surge.
Manufacturer runtime
14 hrs at 50% load
Engine
Briggs & Stratton 208cc
Fuel tank
5.0 gal
115.0 / 117.0 / 110.0 lbs
Unit weight
25.5 × 21.1 × 21.4 in
L × W × H
Starting
Recoil
Power system
Automatic voltage regulation
CO protection
CO Guard automatic shutdown
Low-oil protection
Automatic shutdown
Electrical output: 120 / 120 / 240V.
Official product gallery
These Briggs & Stratton images show product angles, controls, safety systems, mobility features, engine details, and manufacturer feature callouts.
Complete specifications
Specifications and feature descriptions come directly from the current Briggs & Stratton U.S. model page. Some pages group multiple catalog variants, so differing values are shown together.
Manufacturer overview
Multi-Featured Control Panel with RV Outlet
Includes one GFCI 120V household outlets and one 120V RV outlet to power essentials in your home or items in your RV when you're away from home.
Briggs & Stratton PowerBuilt™ 208cc OHV Engine
Durable, easy starting engine features Overhead Valve (OHV) technology to run cooler and last longer, ideal for portable generators.
Easy Mobility
Featuring 7" Never-Go-Flat wheels and a fold-up handle.
CO Guard ® Carbon Monoxide Shutdown Technology
Advanced detection. Added protection. This patent-pending technology shuts down your generator when harmful levels of carbon monoxide accumulate in the generator's operating area.
Best-fit uses
Standout features
Run your essentials through our independent wattage calculator before buying.
Price & Availability
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
See current offers
Check current price
at Briggs & Stratton · Verify stock
Seller options
1
0 with price
Offer rank
22/100
Relative to listed sellers
Data confidence
30%
5 open fields
Delivered totals
0/1
Shipping included
The only verified seller destination for this exact model. Confirm current price and stock with the seller.
Seller data checked Sep 15, 2026.
Shipping not yet verified.
Open fields: current price, 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
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.
Briggs & Stratton
Check current price
Total not available
30% data confidence · checked Sep 15, 2026
Price history
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.
Briggs & Stratton
Check current price · Verify stock
Ownership
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 Briggs & Stratton 3500 Watt manual for maintenance intervals, fluids, storage limits, and warranty requirements. Similar models are not interchangeable.
Published warranty
2 Year Limited
Commercial coverage: 1 Year Limited. 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
115 lb · Gasoline
Plan a wheeled route, stable storage position, and help for steps or vehicle loading.
Practical care plan
Day one
Save the receipt, serial number, seller, warranty terms, and model-specific manual before packaging is discarded.
Before first load
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.
Before every use
Check oil level, leaks, cords, outlets, grounding instructions, CO-safe placement, and the transfer equipment needed for any building connection.
By hours and season
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
Evidence
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
6 of 8 relevant evidence fields are documented for this model.
Source-backed editorial analysis—not a hands-on or laboratory test.
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
No model-text match
39 generator recall records screened
75%
Documented fields
3
Traceable sources
3
Reproducible calculations
2
Open evidence gaps
Published surge reserve
875W
4,375W peak − 3,500W running
25% above rated running output. This is arithmetic headroom, not a promise that every motor load will start.
Rated power density
30.43 running W/lb
3,500W ÷ 115 lb
A catalog-derived portability ratio. It does not account for handles, wheels, shape, or how the weight feels in use.
Strongest class-relative spec
62th percentile
Published runtime: 14 hr ranked within 130 mid output portable generators
Longer than 62% of its class
Claim-by-claim evidence ledger
| Evidence type | Claim | Basis | Trace |
|---|---|---|---|
| Published factSource-backed | 3,500W running and 4,375W peak output are recorded for this model. | Model-specific output fields in the catalog. | Official model source |
| Published factSource-backed | Gasoline power and 115 lb product weight are recorded. | Published configuration and dimensional data. | Official model source |
| Original calculationReproducible | Published surge reserve: 875W. | 4,375W peak − 3,500W running | Calculation standard |
| Original calculationReproducible | Rated power density: 30.43 running W/lb. | 3,500W ÷ 115 lb | Calculation standard |
| Original calculationReproducible | Strongest class-relative spec: 62th percentile. | Published runtime: 14 hr ranked within 130 mid output portable generators | Calculation standard |
| Editorial judgmentEditorial | Best for specific needs for portable power. | Class score 40/100, declared best use, comparative specifications, and explicit buying cautions. | Inspect the score |
| Editorial judgmentEditorial | A reliable public price is not currently published. Confirm the delivered total and return terms with the seller. | Editorial risk check based on product category, weight, output, price availability, and missing fields. | Judgment standard |
| Open evidence gapCaution | Published price 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 |
| Open evidence gapCaution | Sound 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 |
Source ledger
What this evidence cannot prove
Editorial analysis for Briggs & Stratton 3500 Watt. Source record last verified Sep 15, 2026. Corrections can be submitted through the contact page with a model-specific source.
Ownership resources
Start with the exact Briggs & Stratton 3500 Watt model or item number. Accessory families can look alike while using different connectors, electrical limits, engines, or mounting points.
Compatible accessories
Use a correctly rated cord or professionally selected inlet connection for the intended load.
Model-matched filters, spark plugs, batteries, oil supplies, and service parts support scheduled maintenance.
A fitted storage cover protects a cooled, stored generator. A running shelter must be designed for generator operation.
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
The key decision is above. These supporting scorecards, owner signals, and evidence notes stay out of the way until you want to inspect them.
Find My Generator score
Best for specific needs
Compared with 130 mid output portable generators in the current catalog.
Running and peak output versus the class
Longest published runtime figure
Lower weight scores higher
Single-fuel operation
Class comparison
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 11% of its class
Peak output
Higher than 14% of its class
Published runtime
Longer than 62% of its class
Product weight
Lighter than 61% of its class
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.
Starter Fit Score
Strong fit
For a 3,000W target and a $1,500 budget.
Clears your critical profile limits
Why it scored this way
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.
Clears your 3,000W running target.
Price is not published; confirm the current offer.
Gasoline works with your flexible fuel preference.
115 lb against your medium portability priority.
Noise is not published; quietness gets a neutral score.
Home-backup fit rewards adequate output and fuel flexibility.
Testing protocol
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.
Manufacturer-published baselines
Rated running output
3,500W
Peak / starting output
4,375W
Product weight
115 lb
Published sound level
Not published
These numbers organize the test plan. They are not independent confirmations.
Model-specific test matrix
Planned measurement
Can 3500 Watt 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.
Planned measurement
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.
Planned measurement
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.
Planned measurement
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.
Planned measurement
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.
Controlled conditions
Required equipment class
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
Long-term reports from confirmed owners show starting, maintenance, failure, support, and recommendation outcomes for the Briggs & Stratton 3500 Watt.
See how ownership is verifiedVerified owners only
Reliability percentages stay hidden until at least 5 ownership-verified reports are published for this exact model — 5 more needed.
Purchase or registration evidence is reviewed privately.
Reports separate new ownership from 12+ month experience.
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
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.
Prices can change faster than technical specifications. Always confirm the current price, exact model number, and manual before purchase.
CPSC model screening