Subaru Industrial Engines has introduced two new big block V-Twin engines. The 35-hp (26 kW) EH90 and 40-hp (30 kW) EH99 meet a growing demand for larger, air-cooled gasoline engines that deliver increased power for a wider range of applications. The engines are ideal for equipment like concrete polishers, riding trowels, utility vehicles, zero-turn mowers and ride-on blowers.
The EH90 and EH99 are 999cc and feature heavy-duty connecting rods, large crankshaft bearings and three-ring pistons. The hardened exhaust valve and seats can handle high temperatures, which improves engine performance, efficiency and overall life of the engine. Temperature sensors are located on the engine heads and will shut off the engine to prevent any damage from overheating due to clogged air intake valves, according to the manufacturer.
In addition, the standard four-cycle OHV (overhead valve) gasoline engines feature a dual element air filter that protects the engine from dust and reduces maintenance. A Donaldson canister style air cleaner comes standard on both engine configurations and has an inlet pre-cleaner, which offers additional filtration by removing a majority of the particles before they reach the filter, thereby minimizing maintenance and extending the intervals between cleanings or filter changes.
Furthermore, a low oil pressure sensor allows equipment manufacturers to offer control panel alerts or automatic engine shutoff. Pressurized lubrication systems keep the engine well lubricated by pumping oil directly to every critical bearing, even when a piece of equipment is operating at extreme angles.