The EX engine series from
Subaru Industrial Power Products
Subaru Industrial Power Products was the brand name for products manufactured by the Industrial Products division of Subaru Corporation, which were previously sold under the Robin, Robin-Subaru and Wisconsin Robin brand. The line was sold under ...
includes nine models total, with power ranges from 4.5 to 14
horsepower
Horsepower (hp) is a unit of measurement of power, or the rate at which work is done, usually in reference to the output of engines or motors. There are many different standards and types of horsepower. Two common definitions used today are the ...
. All engines in this line are
four-cycle
A four-stroke (also four-cycle) engine is an internal combustion (IC) engine in which the piston completes four separate strokes while turning the crankshaft. A stroke refers to the full travel of the piston along the cylinder, in either directi ...
,
single-cylinder
A single-cylinder engine, sometimes called a thumper, is a piston engine with one cylinder. This engine is often used for motorcycles, motor scooters, go-karts, all-terrain vehicles, radio-controlled vehicles, portable tools and garden machinery ( ...
,
air-cooled
Air-cooled engines rely on the circulation of air directly over heat dissipation fins or hot areas of the engine to cool them in order to keep the engine within operating temperatures. In all combustion engines, a great percentage of the heat ge ...
engines.
Technology
This line is Subaru's first to utilize chain-driven overhead cam (OHC) technology, and the first to utilize OHC technology in the industrial air-cooled small engine market. The significance of Overhead Cam technology is that it's been proven to enhance engine performance. The technology allows the intake and exhaust valves being positioned for optimum engine performance, which offers lower resistance for the air/fuel mixture flow. Overhead Cam engines also have fewer moving parts and produce less mechanical noise than competitive technologies. They also offer better cooling performance to combat overheating.
Models
With one exception, all engines in the EX line are
carbureted
A carburetor (also spelled carburettor) is a device used by an internal combustion engine to control and mix air and fuel entering the engine. The primary method of adding fuel to the intake air is through the venturi tube in the main meterin ...
. The 7 horsepower EX21 EFI is an
electronic fuel injection engine. The engine line was first introduced with four models in 2001, and has grown to include nine models.
EX Engine Models
* EX13 – 4.5 horsepower
* EX17 – 6 horsepower
* EX21 – 7 horsepower
* EX27 – 9 horsepower
* EX30 – 9.5 horsepower
* EX35 – 12 horsepower
* EX40 – 14 horsepower
* EX21 EFI – 7 horsepower
* EX27 All Season – 9 horsepower
Applications
The engines can be used on construction equipment such as soil compactors, pressure washers, generators, water pumps, air compressors, log splitters, lawn and turf seeders and chippers/shredders. The engines have also found to work well on go-karts.
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References
External links
2021 Subaru Impreza
Subaru engines