Subaru's line of electronic fuel injection (EFI) engines are ideally suited for use with a variety of equipment, including welders, generators, pressure washers and lawnmowers. The line includes two models, the EH72 V-Twin and EH72 UTV.
Allowing for differences in operating speed, applications and fuel type, the estimated fuel economy improvements are 11-25% over that of a similar carbureted engine. Additionally, exhaust emissions are reduced by more than 20%, Subaru assures.
Fuel volume is closely controlled to provide faster starts in a variety of ambient temperatures. Excellent response and acceleration is delivered from the initial start up, Subaru says, eliminating the need for a choke.
Altitude changes pose no threat to the EFI engine’s operation, thanks to precise oxygen level detection from the ECU (electronic control unit) sensors. The system is able to identify changes in altitude and instantly adjust the air-to-fuel ratio to make it ideal for the current location. As a result, maximum fuel economy and power in any altitude is achieved throughout the entire power range from low idle to full power, Subaru assures.
Both models are available in a 653cc or 720cc configurations, with power outputs ranging from 20-27 horsepower. The engines feature a two-barrel manifold with a fuel injector for each cylinder. This allows each cylinder to operate independently of the other, which aids in fuel optimization and also in improving the engine’s efficiency and performance.
For applications that require a smaller, more compact engine, the EH72 UTV engine is available in a low-profile design for both the 653cc and 720cc configurations.