Their motors are often used by other gas power washer makers. Though most manufacturers produce trustworthy motors, names like Briggs & Stratton, Honda, and Kohler have particularly strong reputations for reliability and durability. However, two motors of the same size can produce different amounts of power, so it’s useful to check horsepower (HP) as well. The actual size of the gas engine is given in cubic centimeters (cc). With the stringent California Air Resources Board (CARB) regulations and increasingly strict EPA restrictions, several gas pressure washer manufacturers now use the term “50-state” to indicate that their low-emission motors are compliant with all current regulations. With top-rated gas power washers, a four-stroke motor provides more reliability, lasts longer, runs more quietly, and produces lower emissions. Those with two-stroke engines have their advantages on tools like chainsaws, but gas pressure washers don’t need to run as fast. Gas pressure washers almost invariably use four-stroke (also called four-cycle) engines. It’s more often quoted on electric pressure washer units (possibly because the figures are impressive) but is of limited practical value. As such, it’s not a performance indicator on its own but can be used to give an overall comparison among models.
If there is high psi but low GPM, a powerful jet of water still is possible, but it will be very thin and thus of limited use. However, both psi and GPM are interdependent to some extent. More gallons per minute usually indicates the ability to clean larger areas. GPM is the volume of water flow the pressure washer can supply.Low psi, which can be a challenge with an electric pressure washer, limits the jobs that can be done. If starting with a high psi, it can usually be turned down.
Higher numbers mean a stronger jet and thus a greater ability to cut through dirt and grime. PSI is the actual water pressure a unit generates.Cleaning PerformanceĪ gas pressure washer’s cleaning performance can be compared using three measurements: pounds per square inch (psi), gallons per minute (GPM), and cleaning units (CU). In essence, gas pressure washers are for cleaning hard surfaces-those that can withstand the force of the water jet that’s generated. Some pressure washers can strip rust and flaking paint before refinishing and even remove graffiti. A residential pressure washer is a great choice for cleaning siding and brickwork and removing grease and oil from decking, paths, garage floors, and elsewhere. Medium-duty models can be used for vehicle cleaning, though using an appropriate accessory like a car-cleaning wand is a good idea. In general, gas pressure washers are tools for outside tasks. Though many gas pressure washers have considerable flexibility, they sometimes have too much power. It’s important to use a pressure washer for the right type of cleaning jobs. Understanding the following features will help you select the best gas-powered pressure washer for home use options and tasks you undertake on a regular basis.
#PSI PRESSURE PROFESSIONAL#
At the other end of the scale are heavy-duty professional machines. While most gas power washers deliver higher performance than their electric counterparts, many are still aimed squarely at general-purpose home and yard use. Photo: What to Consider When Choosing the Best Gas Pressure Washer
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