Subaru Industrial Engines’ two big block V-Twin engines—the 35 HP EH90 and 40 HP 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 extremely durable and low maintenance, and they feature heat-reduction technology. Both engines 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 the overall life of the engine. Temperature sensors are located on the engine heads, and they have an optional engine shutoff to prevent any damage from overheating.

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. An optional Donaldson canister style air cleaner 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. The engines come standard with a low-mount air filter.

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. The pressurized lubrication system also allows the OHV engine to use an automotive grade spin-on oil filter, which does an exceptional job of removing dirt and carbon solids to keep the oil clean and extend the time between oil changes. The engine also has an oversized oil cooler to reduce the temperature of the oil in the engine to extend oil life.

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