Pulsar vs GENMAX Dual Fuel Generators

What dual fuel means in this comparison

A dual fuel generator runs on either gasoline or propane from a tank. The engine is tuned for both fuels, and a selector valve or regulator lets you switch without tools. This gives you a backup when gasoline is scarce and a cleaner burning option when you have propane on hand. It also adds moving parts, so the fuel system deserves attention during generator maintenance.

Pulsar and GENMAX both offer dual fuel models across their lineups. Neither brand publishes a unified fuel consumption chart across all models, so you should read the spec sheet for the exact model you are considering. Look at the rated wattage on both fuels, because some generators produce slightly less on propane than on gasoline.

The choice between the two brands is often a choice between two families of generators rather than two single products. Pulsar has a reputation for no-frills open frame units aimed at job sites and home backup. GENMAX has pushed into inverter models as well, which matter if you plan to run laptops or other sensitive electronics. For a deeper look at other dual fuel makers, see our best dual fuel generators guide.

Wattage comparison

Both brands span the portable generator range from small recreational units to high output machines. Pulsar offers models in the 3,000 to 9,000 watt class, while GENMAX also covers that range and adds some larger units. Your load determines the class you need, not the badge on the generator.

Start by listing the appliances and tools you will power at the same time. Compare the starting watts of your motor driven loads against the generator's surge rating. Then compare running watts against the continuous rating. Our guide on generator running watts vs starting watts explains that distinction clearly.

If you only need power for a refrigerator and some lights, a model in the 3,000 to 5,000 watt class is enough. If you want to back up a well pump or a window air conditioner, step up to the 5,001 to 9,000 watt class. See our best 3000 to 5000 W generators and best 5001-9000 watt generators guides for specific picks.

Run time comparison

Run time depends on three things: fuel tank capacity, load percentage, and fuel type. Propane contains less energy per volume than gasoline, so a generator usually runs longer on a full tank of gasoline than on a standard 20 pound propane cylinder, all else being equal.

Both brands publish run time figures for their models, usually at half load or quarter load. Always check the load assumption in the spec sheet, because a figure at 25% load is not comparable to a figure at 50% load. Our explainer on generator runtime at half load covers how to read these numbers.

For overnight use, a larger fuel tank helps more than a slightly more efficient engine. A generator that sips fuel at low load still needs enough fuel to last the night. If you plan to run on propane, a large cylinder or an external tank connection can extend run time beyond a single tank. See generator fuel tank size and run time for the full picture.

Ease of use comparison

Ease of use comes down to starting method, control layout, and how easy it is to switch fuels. Both brands offer recoil start on smaller models and electric start on larger ones. Electric start requires a battery, which needs to stay charged; see generator electric start battery.

Pulsar control panels tend to be straightforward with a simple switch to select gasoline or propane and a few outlets. GENMAX models often add a digital display and more outlet options. Neither layout is objectively better, but you should choose the panel you can read and reach comfortably, especially during a storm.

The fuel selector on both brands is typically a knob or valve that directs fuel from the carburetor or the propane regulator. Switching between fuels while the engine is running is possible but not recommended, because the carburetor bowl still holds gasoline. Make the switch before you start the engine, and see our how to switch dual fuel generator gasoline propane for the safe sequence.

CO safety and placement

Regardless of which brand you choose, the exhaust contains carbon monoxide, which is odorless and colorless. The CPSC states that a portable generator can produce as much CO as hundreds of cars, and that it can kill you in minutes if used indoors. Never run a generator inside a home, garage, basement, crawlspace, or shed.

Use the generator outside, far from windows, doors, and vents. The CPSC recommends at least 20 feet of distance, with the exhaust pointed away from the home. Always keep a working CO alarm inside the living space. Both Pulsar and GENMAX models may include a CO sensor that shuts the engine down when CO builds up near the generator; see what is a CO sensor on a generator for how it works.

The EPA adds that deadly CO levels can linger for hours even after the generator shuts off. The placement rules apply the same to every dual fuel generator, whether it runs on gasoline or propane. Read our generator safety checklist outdoor use before you ever start a new unit.

Which one should you pick

Pick the model, not the brand, based on the watts you need and the fuel tank that fits your outage pattern. If you want the simplest and most affordable way to keep a refrigerator running, a Pulsar open frame dual fuel in the 3,000 to 5,000 watt class may be plenty. If you want inverter output for a camping trip or to protect a laptop, a GENMAX inverter dual fuel may be the better match.

Also weigh the warranty and local service options. Neither brand has the dealer network of a Champion or Westinghouse, so check how far you must travel for service. For a side by side with other makers, see Champion Power Equipment vs Pulsar generators.

If you are still unsure about the wattage class, read how many watts do I need generator first. Then use our buying guides to compare specific models side by side on the specs that matter.

What to pick for your use

Questions

Which brand offers more wattage choices?

Both brands cover the 3,000 to 9,000 watt range. GENMAX also offers some larger units. Your needed wattage should come from your load list, not from brand availability.

Can I run a Pulsar or GENMAX on a 20 pound propane cylinder?

Yes, both brands accept a standard 20 pound propane tank through a regulator hose. Run time will be shorter than on a full tank of gasoline because propane has lower energy density.

Do Pulsar and GENMAX dual fuel generators have electric start?

Some models do, especially in the larger wattage classes. Smaller models may be recoil start only. Check the spec sheet for the specific model you are considering.

Are Pulsar or GENMAX generators safe to use in the rain?

No portable generator is safe to touch in wet conditions. Keep it under a canopy or cover and on a dry surface. The CO exhaust remains deadly regardless; placement rules still apply.