Model PG5250BPulsar 4,250W Dual-Fuel Generator Review
The Pulsar PG5250B is a 5250-watt peak and 4250-watt running dual-fuel generator. It features Switch & Go technology for easy fuel switching, making it suitable for job sites, home backup, and recreational use.
At a Glance
- Running Watts4250W
- Starting Watts5250W
- Fuel TypeDual-Fuel
- Runtime (50%)12h
- Noise Level72 dB
- Weight110 lbs
Where to buy
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Is this the right generator for you?
Here's the quick tradeoff view — what this model does well, and where it may not fit.
Pros
- Operates on gasoline or propane for versatile fuel options
- High peak wattage of 5250 and continuous wattage of 4250 on gasoline
- Seamless fuel switching with Switch & Go technology
- Includes multiple outlets suitable for various devices and RV use
- Long runtime of 12 hours at half load with a 4-gallon tank
Cons
- Heavy weight of 110 pounds may affect portability
- Lacks electric start for easier operation
Summary
The Pulsar PG5250B is a dual-fuel generator built around 5,250 starting watts and 4,250 running watts. That combination gives it the headroom to handle higher startup demands while still delivering a steady output once equipment is running.
By supporting dual-fuel operation, the PG5250B adds flexibility in how it can be fueled without changing the core promise of a 5,250-watt class portable generator.
Power & Runtime
As a dual-fuel generator, the PG5250B pairs its 5,250 starting watts with 4,250 running watts to cover both surge needs and ongoing power delivery. In practical use, the higher starting figure helps when loads kick on, while the running wattage is the number that matters for keeping devices operating continuously.
Noise is rated at 72 dBA, which frames how present the generator will sound while operating. For runtime, the unit is listed at 12 hours at 50 percent load, giving a clear expectation for longer stretches of use at a mid-level demand.
Portability
At 110 lbs, the PG5250B is a substantial portable unit, and that weight signals a generator you will plan around when moving or loading. Its physical footprint is 23.2 x 17 x 17.8 inches, which helps set expectations for storage space and how it will fit in a garage, shed, or vehicle.
Those dimensions also make it easier to judge placement on-site, whether you are setting it up with clearance in mind or fitting it into a tighter storage area between uses.
Features
Starting is handled through a recoil system, keeping operation straightforward and fully manual. A built-in fuel gauge supports quick checks at a glance, which is especially helpful when you are managing longer run sessions and want a simple way to monitor fuel status.
Compliance is listed as CARB and EPA, and the inclusion of a spark arrestor adds a safety-focused element for operation where spark control matters. Automatic voltage regulation is also included, which is designed to help keep output steadier as loads change. Pulsar backs the PG5250B with a 2-year warranty, and RV-ready capability is included for users who want a generator that is set up for RV use.
Recommended Audiences
- RV owners needing RV-ready power
- Buyers wanting fuel flexibility with dual or tri-fuel capability
- Homeowners needing emergency backup for essential circuits
- DIY enthusiasts and hobbyists needing reliable portable power
Score Breakdown
- Dual-Fuel+1
- Watts/$
- Surge/$
- Runtime/$
- Warranty
- THD (lower=better)
- Build Quality
- Noise (lower=better)
- Portability
- Outlet Variety
- Feature Points
What this generator can power
At a Glance
- Continuous:4,250W(recommended usable: 3,400W)
- Surge:5,250W
- Output:120/240V
- Inverter:No
Big-item compatibility
May struggle with startup surge
Exceeds capacity
Exceeds capacity
Exceeds capacity
Example setups
Essentials
- Lights + Wi-Fi + Charging
- Refrigerator
- Furnace Blower
- Sump Pump (1/3 HP)
Est. running: 1,800W
Peak surge (single motor): 2,000W
Avoid starting multiple motor loads at the same time.
Essentials + Comfort
- Lights + Wi-Fi + Charging
- Refrigerator
- TV + Entertainment System
- Microwave
- Window AC (10,000 BTU)
Est. running: 2,900W
Peak surge (single motor): 2,000W
Avoid starting multiple motor loads at the same time.
Jobsite / Tools
- Lights + Wi-Fi + Charging
- Circular Saw (7 1/4")
Est. running: 1,600W
Peak surge (single motor): 2,800W
Avoid starting multiple motor loads at the same time.
These are estimates using typical wattage assumptions. Real appliances vary. Startup surges can be 2–6× the running wattage for motor-driven loads. 240V loads require a 120/240V generator and proper connection. Use a transfer switch or interlock kit; never backfeed a panel.
About Pulsar
Pulsar is recognized in the generator industry for providing reliable and versatile power solutions, including dual-fuel and inverter models that cater to residential and commercial needs.
Warranty
Power by fuel
| Fuel | Running | Starting | Runtime @50% | Runtime @25% |
|---|---|---|---|---|
| Gasoline | 4250W | 5250W | 12h | — |
| Propane | 3850W | 4750W | — | — |
Full Specifications
Power
| Running Watts | 4,250 watts |
|---|---|
| Starting Watts | 5,250 watts |
| Starting Watts (Gasoline) | 5,250 W |
| Starting Watts (Propane) | 4,750 W |
| Running Watts (Gasoline) | 4,250 W |
| Running Watts (Propane) | 3,850 W |
Engine
| Engine | Ducar OHV 4-stroke |
|---|---|
| Engine Type | Ducar OHV 4-stroke |
| Engine Displacement | 224 cc |
| Engine Oil | 10W-30 |
| Engine Oil Capacity | 0.625 Qt |
| Spark Arrestor | Yes |
| Emissions Compliance | CARB, EPA |
Electrical
| Voltage (AC) | 120/240 |
|---|---|
| Phase | Single |
| Running Amps | 35.4 A |
| Peak Amps | 43.8 A |
| AC Frequency | 60 hz |
| Current | 35.4A @ 120V / 17.7A @ 240V amps |
| GFCI Outlets | No |
| AC Outlets | 1x Duplex 120V 20A (5-20R)1x 120V 30A (TT-30R)1x 120/240V 30A (L14-30R) |
Dimensions
| Dimensions | 23.2 x 17 x 17.8 inches |
|---|---|
| Weight | 110 lbs |
Other
| Automatic Low Oil Shutdown | Yes |
|---|---|
| Emissions Compliance | CARB, EPA |
| Automatic Voltage Regulation | Yes |
| Automatic Voltage Regulator | Yes |
| Carbon Monoxide Sensor | No |
| Covered Outlets | No |
| Electric Start | No |
| Fuel Gauge | Yes |
| Fuel Tank Capacity | 4 gallons |
| Included Accessories | Propane hose and wheel kit |
| Indicators | No |
| Inverter | No |
| Noise Level | 72 dBA |
| Overload Protection | Low oil and overload protection |
| Parallel Capable | No |
| Recoil Start | Yes |
| RV Ready | Yes |
| Starter Type | Recoil |
| Starting System | Recoil |
| UPC | 814,726,021,603 |
| Warranty | 2 years |
| Wheels | Yes |
Core
| Fuel Type | Dual-Fuel |
|---|
Runtime
| Runtime @ 50% | 12 hours |
|---|---|
| Runtime @ 50% Load (Gasoline) | 12 hours |
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